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• Cast to generic type in C#

  - by Andrej

  I have a Dictionary to map a certain type to a certain generic object for that type. For example: typeof(LoginMessage) maps to MessageProcessor<LoginMessage> Now the problem is to retrieve this generic object at runtime from the Dictionary. Or to be more specific: To cast the retrieved object to the specific generic type. I need it to work something like this: Type key = message.GetType(); MessageProcessor<key> processor = messageProcessors[key] as MessageProcessor<key>; Hope there is a easy solution to this. Edit: I do not want to use Ifs and switches. Due to performance issues I cannot use reflection of some sort either.

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• Generic Text Only printer driver mangles control codes

  - by Terry

  If an escape character (or most other characters < 0x20) is sent to the generic / text only printer it gets printed as a period. Using the code in the WinDDK is it possible to 'correct' this behaviour so that it passes it through unmodified? The general scenario for this is that some application ('user app') outputs a document to a windows printer. My application requires this data in plain text form and so what I do is run a generic / text only printer that talks to a virtual com port. This generally works fine except where the 'user app' outputs binary data to the print queue without using the correct mechanism (which seems to work fine on some printer drivers, such as the Epson POS ones, but not the generic / text only one). I've tried changing the print processor selection without success and also tried looking at the gtt files to see if I could readily map in these characters as though they were printable, but the minidriver tool won't let me do that. Any suggestions?

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• I have 6 updates that won't install on Ubuntu 12.04?

  - by Taylor

  I'm an Ubuntu novice, so any help here is greatly appreciated! I'm running Ubuntu 12.04, and I have six updates that just won't install. I've tried Update Manger, sudo apt-get upgrade, and sudo apt-get update. Nothing has worked so far. Here are the details I get from Update Manager: installArchives() failed: Setting up linux-image-3.2.0-24-generic-pae (3.2.0-24.37) ... Running depmod. sh: 1: /usr/sbin/update-initramfs: not found Failed to create initrd image. dpkg: error processing linux-image-3.2.0-24-generic-pae (--configure): subprocess installed post-installation script returned error exit status 2 Setting up linux-image-3.2.0-27-generic-pae (3.2.0-27.43) ... No apport report written because MaxReports is reached already Running depmod. sh: 1: /usr/sbin/update-initramfs: not found Failed to create initrd image. dpkg: error processing linux-image-3.2.0-27-generic-pae (--configure): subprocess installed post-installation script returned error exit status 2 No apport report written because MaxReports is reached already Setting up linux-image-3.2.0-29-generic-pae (3.2.0-29.46) ... Running depmod. sh: 1: /usr/sbin/update-initramfs: not found Failed to create initrd image. dpkg: error processing linux-image-3.2.0-29-generic-pae (--configure): subprocess installed post-installation script returned error exit status 2 No apport report written because MaxReports is reached already Setting up udev (175-0ubuntu9.1) ... udev stop/waiting udev start/running, process 3685 /var/lib/dpkg/info/udev.postinst: 87: /var/lib/dpkg/info/udev.postinst: update-initramfs: not found dpkg: error processing udev (--configure): subprocess installed post-installation script returned error exit status 127 No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of xserver-xorg-core: xserver-xorg-core depends on udev (= 149); however: Package udev is not configured yet. dpkg: error processing xserver-xorg-core (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of fglrx: fglrx depends on xserver-xorg-core; however: Package xserver-xorg-core is not configured yet. dpkg: error processing fglrx (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of fglrx-amdcccle: fglrx-amdcccle depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-amdcccle (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of linux-image-generic-pae: linux-image-generic-pae depends on linux-image-3.2.0-24-generic-pae; however: Package linux-image-3.2.0-24-generic-pae is not configured yet. dpkg: error processing linux-image-generic-pae (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of linux-generic-pae: linux-generic-pae depends on linux-image-generic-pae (= 3.2.0.24.26); however: Package linux-image-generic-pae is not configured yet. dpkg: error processing linux-generic-pae (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of xserver-xorg-video-intel: xserver-xorg-video-intel depends on xorg-video-abi-11; however: Package xorg-video-abi-11 is not installed. Package xserver-xorg-core which provides xorg-video-abi-11 is not configured yet. xserver-xorg-video-intel depends on xserver-xorg-core (= 2:1.10.99.901); however: Package xserver-xorg-core is not configured yet. dpkg: error processing xserver-xorg-video-intel (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of fglrx-dev:No apport report written because MaxReports is reached already fglrx-dev depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-dev (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already Errors were encountered while processing: linux-image-3.2.0-24-generic-pae linux-image-3.2.0-27-generic-pae linux-image-3.2.0-29-generic-pae udev xserver-xorg-core fglrx fglrx-amdcccle linux-image-generic-pae linux-generic-pae xserver-xorg-video-intel fglrx-dev Error in function: Setting up linux-image-3.2.0-24-generic-pae (3.2.0-24.37) ... Running depmod. sh: 1: /usr/sbin/update-initramfs: not found Failed to create initrd image. dpkg: error processing linux-image-3.2.0-24-generic-pae (--configure): subprocess installed post-installation script returned error exit status 2 Setting up linux-image-3.2.0-29-generic-pae (3.2.0-29.46) ... Running depmod. sh: 1: /usr/sbin/update-initramfs: not found Failed to create initrd image. dpkg: error processing linux-image-3.2.0-29-generic-pae (--configure): subprocess installed post-installation script returned error exit status 2 Setting up linux-image-3.2.0-27-generic-pae (3.2.0-27.43) ... Running depmod. sh: 1: /usr/sbin/update-initramfs: not found Failed to create initrd image. dpkg: error processing linux-image-3.2.0-27-generic-pae (--configure): subprocess installed post-installation script returned error exit status 2 Setting up udev (175-0ubuntu9.1) ... udev stop/waiting udev start/running, process 3782 /var/lib/dpkg/info/udev.postinst: 87: /var/lib/dpkg/info/udev.postinst: update-initramfs: not found dpkg: error processing udev (--configure): subprocess installed post-installation script returned error exit status 127 dpkg: dependency problems prevent configuration of linux-image-generic-pae: linux-image-generic-pae depends on linux-image-3.2.0-24-generic-pae; however: Package linux-image-3.2.0-24-generic-pae is not configured yet. dpkg: error processing linux-image-generic-pae (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of xserver-xorg-core: xserver-xorg-core depends on udev (= 149); however: Package udev is not configured yet. dpkg: error processing xserver-xorg-core (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of fglrx: fglrx depends on xserver-xorg-core; however: Package xserver-xorg-core is not configured yet. dpkg: error processing fglrx (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of linux-generic-pae: linux-generic-pae depends on linux-image-generic-pae (= 3.2.0.24.26); however: Package linux-image-generic-pae is not configured yet. dpkg: error processing linux-generic-pae (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of xserver-xorg-video-intel: xserver-xorg-video-intel depends on xorg-video-abi-11; however: Package xorg-video-abi-11 is not installed. Package xserver-xorg-core which provides xorg-video-abi-11 is not configured yet. xserver-xorg-video-intel depends on xserver-xorg-core (= 2:1.10.99.901); however: Package xserver-xorg-core is not configured yet. dpkg: error processing xserver-xorg-video-intel (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of fglrx-amdcccle: fglrx-amdcccle depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-amdcccle (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of fglrx-dev: fglrx-dev depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-dev (--configure): dependency problems - leaving unconfigured

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• Computer crashed during 3.0.0.17-generic kernel upgrade

  - by Z Swim

  My computer crashed (due to heat) during the update process for the 3.0.0.17-generic kernel upgrade. My computer will not boot ant all in 3.0.0.17 now and 3.0.0.16 is unstable (wireless networking doesn't work, also crashes often). I found the boot to previous versions tool at start up and the last stable version is 3.0.0.15-generic. However, my computer still thinks that it has 3.0.0.16-generic and 3.0.0.17-generic, even though both of these versions are broken. Is there anyway to force a reinstall of the 3.0.0.16-generic and 3.0.0.17-generic kernel updates from 3.0.0.15 and associated other updates?. (Without having to do a full reinstall?) I am running ubuntu 11.10. Thanks!

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• Problem using Lazy<T> from within a generic abstract class

  - by James Black

  I have a generic class that all my DAO classes derive from, which is defined below. I also have a base class for all my entities, but that is not generic. The method GetIdOrSave is going to be a different type than how I defined SabaAbstractDAO, as I am trying to get the primary key to fulfill the foreign key relationships, so this function goes out to either get the primary key or save the entity and then get the primary key. The last code snippet has a solution on how it will work if I get rid of the generic part, so I think this can be solved by using variance, but I can't figure out how to write an interface that will compile. public abstract class SabaAbstractDAO<T> { ... public K GetIdOrSave<K>(K item, Lazy<SabaAbstractDAO<BaseModel>> lazyitemdao) where K : BaseModel { if (item != null && item.Id.IsNull()) { var itemdao = lazyitemdao.Value; item.Id = itemdao.retrieveID(item); if (item.Id.IsNull()) { return itemdao.SaveData(item); } } return item; } } I am getting this error, when I try to compile: Argument 2: cannot convert from 'System.Lazy<ORNL.HRD.LMS.Dao.SabaCourseDAO>' to 'System.Lazy<ORNL.HRD.LMS.Dao.SabaAbstractDAO<ORNL.HRD.LMS.Models.BaseModel>>' I am trying to call it this way: GetIdOrSave(input.OfferingTemplate, new Lazy<SabaCourseDAO>( () => { return new SabaCourseDAO() { Dao = Dao }; }) ); If I change the definition to this, it works. public K GetIdOrSave<K>(K item, Lazy<SabaCourseDAO> lazyitemdao) where K : BaseModel { So, how can I get this to compile using variance (if needed) and generics, so I can have a very general method that will only work with BaseModel and AbstractDAO<BaseModel>? I expect I should only need to make the change in the method and perhaps abstract class definition, the usage should be fine.

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• help me refactor iteration over a generic collection

  - by Biswanath

  Hi, I am working with a generic data structure, say MyGeneric<Type>. There is a case where I have to iterate over all the values it holds The code I am trying to do. for ( all the keys in myGeneric ) { // do lot of stuff here } Now the generic can hold base type as double and string and it can hold some user-defined type also. There is a particular situation where I have to some specific work depending upon the type of the generic. so the final code block looks something like this for( all the keys in myGeneric ) { if key is type foo then //do foo foo else if key is of type bar //do bar bar } Now, as complexity sensitive as I am I do not like to have an if condition in the for loop. So the next solution I did was if myGeneric is of type foo call fooIterator(myGeneric) if myGenric is of type bar call barItetrator(myGeneric) function FooIterator() { // ..... // foo work //...... } function BarItetrator() { // ..... // bar work //...... } Then again when somebody sees my code then I am quite sure that they will shout where is the "refactoring". What is the ideal thing to do in this situation ? Thanks.

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• Generic factory of generic containers

  - by Feuermurmel

  I have a generic abstract class Factory<T> with a method createBoxedInstance() which returns instances of T created by implementations of createInstance() wrapped in the generic container Box<T>. abstract class Factory<T> { abstract T createInstance(); public final Box<T> createBoxedInstance() { return new Box<T>(createInstance()); } public final class Box<T> { public final T content; public Box(T content) { this.content = content; } } } At some points I need a container of type Box<S> where S is an ancestor of T. Is it possible to make createBoxedInstance() itself generic so that it will return instances of Box<S> where S is chosen by the caller? Sadly, defining the function as follows does not work as a type parameter cannot be declared using the super keyword, only used. public final <S super T> Box<S> createBoxedInstance() { return new Box<S>(createInstance()); } The only alternative I see, is to make all places that need an instance of Box<S> accept Box<? extends S> which makes the container's content member assignable to S. Is there some way around this without re-boxing the instances of T into containers of type Box<S>? (I know I could just cast the Box<T> to a Box<S> but I would feel very, very guilty.)

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• Update fails to Install

  - by FirmTech

  I get the below error when I try to install updates using Software Updater: Not enough free disk space The upgrade needs a total of 81.3 M free space on disk '/boot'. Please free at least an additional 15.9 M of disk space on '/boot'. Empty your trash and remove temporary packages of former installations using 'sudo apt-get clean'. What should I do? firmtechnologies@FirmTechnologies:~$ (ls -l /boot) total 155801 -rw-r--r-- 1 root root 1158016 May 3 01:30 abi-3.13.0-24-generic -rw-r--r-- 1 root root 1161713 May 8 01:31 abi-3.13.0-26-generic -rw-r--r-- 1 root root 1161713 May 15 20:07 abi-3.13.0-27-generic -rw-r--r-- 1 root root 1161764 Jun 4 22:57 abi-3.13.0-29-generic -rw-r--r-- 1 root root 165510 May 3 01:30 config-3.13.0-24-generic -rw-r--r-- 1 root root 165538 May 8 01:31 config-3.13.0-26-generic -rw-r--r-- 1 root root 165521 May 15 20:07 config-3.13.0-27-generic -rw-r--r-- 1 root root 165544 Jun 4 22:57 config-3.13.0-29-generic drwxr-xr-x 5 root root 1024 Jun 6 14:31 grub -rw-r--r-- 1 root root 29091568 May 7 21:31 initrd.img-3.13.0-24-generic -rw-r--r-- 1 root root 29094684 May 12 12:24 initrd.img-3.13.0-26-generic -rw-r--r-- 1 root root 29095678 May 18 10:57 initrd.img-3.13.0-27-generic -rw-r--r-- 1 root root 29093700 Jun 6 14:32 initrd.img-3.13.0-29-generic drwx------ 2 root root 12288 Apr 30 17:11 lost+found -rw-r--r-- 1 root root 176500 Mar 12 13:31 memtest86+.bin -rw-r--r-- 1 root root 178176 Mar 12 13:31 memtest86+.elf -rw-r--r-- 1 root root 178680 Mar 12 13:31 memtest86+_multiboot.bin -rw------- 1 root root 3372643 May 3 01:30 System.map-3.13.0-24-generic -rw------- 1 root root 3377429 May 8 01:31 System.map-3.13.0-26-generic -rw------- 1 root root 3377429 May 15 20:07 System.map-3.13.0-27-generic -rw------- 1 root root 3378267 Jun 4 22:57 System.map-3.13.0-29-generic -rw------- 1 root root 5776416 May 3 01:30 vmlinuz-3.13.0-24-generic -rw------- 1 root root 5790912 May 8 01:30 vmlinuz-3.13.0-26-generic -rw------- 1 root root 5790912 May 15 20:07 vmlinuz-3.13.0-27-generic -rw------- 1 root root 5792544 Jun 4 22:57 vmlinuz-3.13.0-29-generic

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• Forming triangles from points and relations

  - by SiN

  Hello, I want to generate triangles from points and optional relations between them. Not all points form triangles, but many of them do. In the initial structure, I've got a database with the following tables: Nodes(id, value) Relations(id, nodeA, nodeB, value) Triangles(id, relation1_id, relation2_id, relation3_id) In order to generate triangles from both nodes and relations table, I've used the following query: INSERT INTO Triangles SELECT t1.id, t2.id , t3.id, FROM Relations t1, Relations t2, Relations t3 WHERE t1.id < t2.id AND t3.id > t1.id AND ( t1.nodeA = t2.nodeA AND (t3.nodeA = t1.nodeB AND t3.nodeB = t2.nodeB OR t3.nodeA = t2.nodeB AND t3.nodeB = t1.nodeB) OR t1.nodeA = t2.nodeB AND (t3.nodeA = t1.nodeB AND t3.nodeB = t2.nodeA OR t3.nodeA = t2.nodeA AND t3.nodeB = t1.nodeB) ) It's working perfectly on small sized data. (~< 50 points) In some cases however, I've got around 100 points all related to each other which leads to thousands of relations. So when the expected number of triangles is in the hundreds of thousands, or even in the millions, the query might take several hours. My main problem is not in the select query, while I see it execute in Management Studio, the returned results slow. I received around 2000 rows per minute, which is not acceptable for my case. As a matter of fact, the size of operations is being added up exponentionally and that is terribly affecting the performance. I've tried doing it as a LINQ to object from my code, but the performance was even worse. I've also tried using SqlBulkCopy on a reader from C# on the result, also with no luck. So the question is... Any ideas or workarounds?

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• Java multi Generic collection parameters complie error

  - by Geln Yang

  Hi, So strange!Please have a look the code first: public class A { } public class B extends A { } public class C extends A { } public class TestMain { public <T extends A> void test(T a, T b) { } public <T extends A> void test(List<T> a, List<T> b) { } public static void main(String[] args) { new TestMain().test(new B(), new C()); new TestMain().test(new ArrayList<B>(), new ArrayList<C>()); } } The statement "new TestMain().test(new ArrayList(), new ArrayList())" get a "Bound mismatch" compile error, while "new TestMain().test(new B(), new C())" is compiled ok. Bound mismatch: The generic method test(T, T) of type TestMain is not applicable for the arguments (ArrayList, ArrayList). The inferred type ArrayList is not a valid substitute for the bounded parameter It seems the type of the second generic List parameter is limited by the Type of the first.Is it a feature or a bug of the compile program? ps, jdk:1.6,IDE:Eclipse 3.5.1

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• Different behavior of reflected generic delegates with and without debugger

  - by Andrew_B

  Hello. We have encountered some strange things while calling reflected generic delegates. In some cases with attatched debuger we can make impossible call, while without debugger we cannot catch any exception and application fastfails. Here is the code: using System; using System.Windows.Forms; using System.Reflection; namespace GenericDelegate { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private delegate Class2 Delegate1(); private void button1_Click(object sender, EventArgs e) { MethodInfo mi = typeof (Class1<>).GetMethod("GetClass", BindingFlags.NonPublic | BindingFlags.Static); if (mi != null) { Delegate1 del = (Delegate1) Delegate.CreateDelegate(typeof (Delegate1), mi); MessageBox.Show("1"); try { del(); } catch (Exception) { MessageBox.Show("No, I can`t catch it"); } MessageBox.Show("2"); mi.Invoke(null, new object[] {});//It's Ok, we'll get exception here MessageBox.Show("3"); } } class Class2 { } class Class1<T> : Class2 { internal static Class2 GetClass() { Type type = typeof(T); MessageBox.Show("Type name " + type.FullName +" Type: " + type + " Assembly " + type.Assembly); return new Class1<T>(); } } } } There are two problems: Behavior differs with debugger and without You cannot catch this error without debugger by clr tricks. It's just not the clr exception. There are memory acces vialation, reading zero pointer inside of internal code. Use case: You develop something like plugins system for your app. You read external assembly, find suitable method in some type, and execute it. And we just forgot about that we need to check up is the type generic or not. Under VS (and .net from 2.0 to 4.0) everything works fine. Called function does not uses static context of generic type and type parameters. But without VS application fails with no sound. We even cannot identify call stack attaching debuger. Tested with .net 4.0 The question is why VS catches but runtime do not?

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• Using generic type from other generic parameter

  - by DEHAAS

  Hi, I have a question about .net generics. Consider the following code: public class Test<TKey> { TKey Key { get; set; } } public class Wrapper<TValue, TKey> where TValue : Test<TKey> { public TValue Value { get; set; } } Now, when using this code, I could do something like this: Wrapper<Test<int>, int> wrapper = new Wrapper<Test<int>, int>(); The int type parameter has to be provided twice. Is it possible to modify the Wrapper definition, to require TValue to be a generic type, and use this 'nested' generic type parameter insted of the TKey type parameter?

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• usb mouse/keyboard doesn't work with 3.11.0-12-generic kernel

  - by x-yuri

  I can't use my usb keyboard/mouse after upgrade from raring to saucy. The keyboard works in grub menu and if I boot with the previous kernel version (3.8.0-31-generic). My new kernel version is 3.11.0-12-generic. I've got Mad Catz R.A.T.7 wired USB mouse, Canyon CNL-MBMSO02 wired usb mouse and Logitech diNovo Edge wireless keyboard, connected to computer through Logitech Unifying Receiver. Using PS/2 keyboard I've managed to get some information. dmesg says: [ 0.166273] ACPI: bus type USB registered [ 0.166273] usbcore: registered new interface driver usbfs [ 0.166273] usbcore: registered new interface driver hub [ 0.166273] usbcore: registered new device driver usb ... [ 3.534226] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 3.534228] ehci-pci: EHCI PCI platform driver [ 3.534291] ehci-pci 0000:00:1a.7: setting latency timer to 64 [ 3.534299] ehci-pci 0000:00:1a.7: EHCI Host Controller [ 3.534304] ehci-pci 0000:00:1a.7: new USB bus registered, assigned bus number 1 [ 3.534315] ehci-pci 0000:00:1a.7: debug port 1 [ 3.538218] ehci-pci 0000:00:1a.7: cache line size of 64 is not supported [ 3.538231] ehci-pci 0000:00:1a.7: irq 18, io mem 0xd3325400 [ 3.548017] ehci-pci 0000:00:1a.7: USB 2.0 started, EHCI 1.00 [ 3.548042] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 [ 3.548045] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.548048] usb usb1: Product: EHCI Host Controller [ 3.548050] usb usb1: Manufacturer: Linux 3.11.0-12-generic ehci_hcd [ 3.548053] usb usb1: SerialNumber: 0000:00:1a.7 [ 3.548155] hub 1-0:1.0: USB hub found [ 3.548159] hub 1-0:1.0: 6 ports detected [ 3.548311] ehci-pci 0000:00:1d.7: setting latency timer to 64 [ 3.548319] ehci-pci 0000:00:1d.7: EHCI Host Controller [ 3.548323] ehci-pci 0000:00:1d.7: new USB bus registered, assigned bus number 2 [ 3.548333] ehci-pci 0000:00:1d.7: debug port 1 [ 3.552228] ehci-pci 0000:00:1d.7: cache line size of 64 is not supported [ 3.552239] ehci-pci 0000:00:1d.7: irq 23, io mem 0xd3325000 [ 3.564014] ehci-pci 0000:00:1d.7: USB 2.0 started, EHCI 1.00 [ 3.564044] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002 [ 3.564047] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564050] usb usb2: Product: EHCI Host Controller [ 3.564052] usb usb2: Manufacturer: Linux 3.11.0-12-generic ehci_hcd [ 3.564056] usb usb2: SerialNumber: 0000:00:1d.7 [ 3.564163] hub 2-0:1.0: USB hub found [ 3.564167] hub 2-0:1.0: 6 ports detected [ 3.564274] ehci-platform: EHCI generic platform driver [ 3.564280] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 3.564281] ohci-platform: OHCI generic platform driver [ 3.564287] uhci_hcd: USB Universal Host Controller Interface driver [ 3.564345] uhci_hcd 0000:00:1a.0: setting latency timer to 64 [ 3.564347] uhci_hcd 0000:00:1a.0: UHCI Host Controller [ 3.564352] uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus number 3 [ 3.564378] uhci_hcd 0000:00:1a.0: irq 16, io base 0x0000f0c0 [ 3.564402] usb usb3: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.564404] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564406] usb usb3: Product: UHCI Host Controller [ 3.564408] usb usb3: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.564410] usb usb3: SerialNumber: 0000:00:1a.0 [ 3.564478] hub 3-0:1.0: USB hub found [ 3.564482] hub 3-0:1.0: 2 ports detected [ 3.564589] uhci_hcd 0000:00:1a.1: setting latency timer to 64 [ 3.564592] uhci_hcd 0000:00:1a.1: UHCI Host Controller [ 3.564597] uhci_hcd 0000:00:1a.1: new USB bus registered, assigned bus number 4 [ 3.564623] uhci_hcd 0000:00:1a.1: irq 21, io base 0x0000f0a0 [ 3.564647] usb usb4: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.564649] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564651] usb usb4: Product: UHCI Host Controller [ 3.564653] usb usb4: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.564654] usb usb4: SerialNumber: 0000:00:1a.1 [ 3.564727] hub 4-0:1.0: USB hub found [ 3.564730] hub 4-0:1.0: 2 ports detected [ 3.564834] uhci_hcd 0000:00:1a.2: setting latency timer to 64 [ 3.564837] uhci_hcd 0000:00:1a.2: UHCI Host Controller [ 3.564843] uhci_hcd 0000:00:1a.2: new USB bus registered, assigned bus number 5 [ 3.564863] uhci_hcd 0000:00:1a.2: irq 18, io base 0x0000f080 [ 3.564885] usb usb5: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.564887] usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564889] usb usb5: Product: UHCI Host Controller [ 3.564891] usb usb5: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.564892] usb usb5: SerialNumber: 0000:00:1a.2 [ 3.564962] hub 5-0:1.0: USB hub found [ 3.564966] hub 5-0:1.0: 2 ports detected [ 3.565073] uhci_hcd 0000:00:1d.0: setting latency timer to 64 [ 3.565076] uhci_hcd 0000:00:1d.0: UHCI Host Controller [ 3.565081] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 6 [ 3.565101] uhci_hcd 0000:00:1d.0: irq 23, io base 0x0000f060 [ 3.565124] usb usb6: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.565127] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.565128] usb usb6: Product: UHCI Host Controller [ 3.565130] usb usb6: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.565132] usb usb6: SerialNumber: 0000:00:1d.0 [ 3.565195] hub 6-0:1.0: USB hub found [ 3.565198] hub 6-0:1.0: 2 ports detected [ 3.565303] uhci_hcd 0000:00:1d.1: setting latency timer to 64 [ 3.565306] uhci_hcd 0000:00:1d.1: UHCI Host Controller [ 3.565310] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 7 [ 3.565329] uhci_hcd 0000:00:1d.1: irq 19, io base 0x0000f040 [ 3.565352] usb usb7: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.565354] usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.565356] usb usb7: Product: UHCI Host Controller [ 3.565358] usb usb7: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.565359] usb usb7: SerialNumber: 0000:00:1d.1 [ 3.565424] hub 7-0:1.0: USB hub found [ 3.565427] hub 7-0:1.0: 2 ports detected [ 3.565534] uhci_hcd 0000:00:1d.2: setting latency timer to 64 [ 3.565537] uhci_hcd 0000:00:1d.2: UHCI Host Controller [ 3.565541] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 8 [ 3.565560] uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000f020 [ 3.565584] usb usb8: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.565587] usb usb8: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.565588] usb usb8: Product: UHCI Host Controller [ 3.565590] usb usb8: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.565592] usb usb8: SerialNumber: 0000:00:1d.2 [ 3.565658] hub 8-0:1.0: USB hub found [ 3.565661] hub 8-0:1.0: 2 ports detected ... [ 4.120014] usb 2-3: new high-speed USB device number 2 using ehci-pci ... [ 4.468908] usb 2-3: New USB device found, idVendor=046d, idProduct=0825 [ 4.468912] usb 2-3: New USB device strings: Mfr=0, Product=0, SerialNumber=2 [ 4.468914] usb 2-3: SerialNumber: AF582E10 ... [ 5.284019] usb 5-2: new full-speed USB device number 2 using uhci_hcd [ 5.465903] usb 5-2: New USB device found, idVendor=046d, idProduct=0b04 [ 5.465908] usb 5-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 5.465911] usb 5-2: Product: Logitech BT Mini-Receiver [ 5.465914] usb 5-2: Manufacturer: Logitech [ 5.468948] hub 5-2:1.0: USB hub found [ 5.470898] hub 5-2:1.0: 3 ports detected [ 5.476096] Switched to clocksource tsc [ 5.712099] usb 7-2: new full-speed USB device number 2 using uhci_hcd [ 5.896366] usb 7-2: New USB device found, idVendor=046d, idProduct=c52b [ 5.896370] usb 7-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 5.896372] usb 7-2: Product: USB Receiver [ 5.896374] usb 7-2: Manufacturer: Logitech [ 6.140016] usb 8-1: new full-speed USB device number 2 using uhci_hcd [ 6.324597] usb 8-1: New USB device found, idVendor=0738, idProduct=1708 [ 6.324603] usb 8-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 6.324605] usb 8-1: Product: Mad Catz R.A.T.7 Mouse [ 6.324608] usb 8-1: Manufacturer: Mad Catz [ 6.564012] usb 8-2: new low-speed USB device number 3 using uhci_hcd [ 6.746602] usb 8-2: New USB device found, idVendor=1d57, idProduct=0010 [ 6.746608] usb 8-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 6.746610] usb 8-2: Product: usb mouse with wheel [ 6.746613] usb 8-2: Manufacturer: HID-Compliant Mouse [ 7.337898] usb 5-2.2: new full-speed USB device number 3 using uhci_hcd [ 7.490902] usb 5-2.2: New USB device found, idVendor=046d, idProduct=c713 [ 7.490907] usb 5-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 7.490910] usb 5-2.2: Product: Logitech BT Mini-Receiver [ 7.490913] usb 5-2.2: Manufacturer: Logitech [ 7.490915] usb 5-2.2: SerialNumber: 001F203BD6A7 [ 7.569898] usb 5-2.3: new full-speed USB device number 4 using uhci_hcd [ 7.722901] usb 5-2.3: New USB device found, idVendor=046d, idProduct=c714 [ 7.722906] usb 5-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 7.722909] usb 5-2.3: Product: Logitech BT Mini-Receiver [ 7.722911] usb 5-2.3: Manufacturer: Logitech [ 7.722913] usb 5-2.3: SerialNumber: 001F203BD6A7 lsusb (more output): Bus 002 Device 002: ID 046d:0825 Logitech, Inc. Webcam C270 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 008 Device 003: ID 1d57:0010 Xenta Bus 008 Device 002: ID 0738:1708 Mad Catz, Inc. Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 004: ID 046d:c714 Logitech, Inc. diNovo Edge Keyboard Bus 005 Device 003: ID 046d:c713 Logitech, Inc. Bus 005 Device 002: ID 046d:0b04 Logitech, Inc. Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub More background. Before that I had a problem with logging in to GNOME. During which I upgraded all the packages at one point (apt-get upgrade) and it stopped booting at all (it didn't get to login screen). Then I fixed PATH issue and now I've got this usb-not-working issue. I tried reinstalling kernel, to no effect. Is there anything else I can do to fix or diagnose the problem?

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• Problem resolving a generic Repository with Entity Framework and Castle Windsor Container

  - by user368776

  Hi, im working in a generic repository implementarion with EF v4, the repository must be resolved by Windsor Container. First the interface public interface IRepository<T> { void Add(T entity); void Delete(T entity); T Find(int key) } Then a concrete class implements the interface public class Repository<T> : IRepository<T> where T: class { private IObjectSet<T> _objectSet; } So i need _objectSet to do stuff like this in the previous class public void Add(T entity) { _objectSet.AddObject(entity); } And now the problem, as you can see im using a EF interface like IObjectSet to do the work, but this type requires a constraint for the T generic type "where T: class". That constrait is causing an exception when Windsor tries to resolve its concrete type. Windsor configuration look like this. <castle> <components> <component id="LVRepository" service="Repository.Infraestructure.IRepository`1, Repository" type="Repository.Infraestructure.Repository`1, Repository" lifestyle="transient"> </component> </components> The container resolve code IRepository<Product> productsRep =_container.Resolve<IRepository<Product>>(); Now the exception im gettin System.ArgumentException: GenericArguments[0], 'T', on 'Repository.Infraestructure.Repository`1[T]' violates the constraint of type 'T'. ---> System.TypeLoadException: GenericArguments[0], 'T', on 'Repository.Infraestructure.Repository`1[T]' violates the constraint of type parameter 'T'. If i remove the constraint in the concrete class and the depedency on IObjectSet (if i dont do it get a compile error) everything works FINE, so i dont think is a container issue, but IObjectSet is a MUST in the implementation. Some help with this, please.

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• C# ASP.NET Binding Controls via Generic Method

  - by OverTech

  I have a few web applications that I maintain and I find myself very often writing the same block of code over and over again to bind a GridView to a data source. I'm trying to create a Generic method to handle data binding but I'm having trouble getting it to work with Repeaters and DataLists. Here is the Generic method I have so far: public void BindControl<T>(T control, SqlCommand sql) where T : System.Web.UI.WebControls.BaseDataBoundControl { cmd = sql; cn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { control.DataSource = dr; control.DataBind(); } dr.Close(); cn.Close(); } That way I can just define my CommandText then make a call to "BindControls(myGridView, cmd)" instead of retyping this same basic block of code every time I need to bind a grid. The problem is, this doesn't work with Repeaters or DataLists. Each of these controls inherit their respective "DataSource" and "DataBind" methods from different classes. Someone on another forum suggested that I implement an interface, but I'm not sure how to make that work either. The GridView, Datalist and Repeater get their respective "DataBind" methods from BaseDataBoundControl, BaseDataList, and Repeater classes. How would I go about creating a single interface to tie them all together? Or am I better off just using 3 overloads for this method? Dave

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• Django throws 404 at generic views

  - by x0rg

  I'm trying to get the generic views for a date-based archive working in django. I defined the urls as described in a tutorial, but django returns a 404 error whenever I want to access an url with a variable (such as month or year) in it. It don't even produces a TemplateDoesNotExist-execption. Normal urls without variables work fine. Here's my urlconf: from django.conf.urls.defaults import * from zurichlive.zhl.models import Event info_dict = { 'queryset': Event.objects.all(), 'date_field': 'date', 'allow_future': 'True', } urlpatterns += patterns('django.views.generic.date_based', (r'events/(?P<year>d{4})/(?P<month>[a-z]{3})/(?P<day>w{1,2})/(?P<slug>[-w]+)/$', 'object_detail', dict(info_dict, slug_field='slug',template_name='archive/detail.html')), (r'^events/(?P<year>d{4})/(?P<month>[a-z]{3})/(?P<day>w{1,2})/(?P<slug>[-w]+)/$', 'object_detail', dict(info_dict, template_name='archive/list.html')), (r'^events/(?P<year>d{4})/(?P<month>[a-z]{3})/(?P<day>w{1,2})/$','archive_day',dict(info_dict,template_name='archive/list.html')), (r'^events/(?P<year>d{4})/(?P<month>[a-z]{3})/$','archive_month', dict(info_dict, template_name='archive/list.html')), (r'^events/(?P<year>)/$','archive_year', dict(info_dict, template_name='archive/list.html')), (r'^events/$','archive_index', dict(info_dict, template_name='archive/list.html')), ) When I access /events/2010/may/12/this-is-a-slug I should get to the detail.html template, but instead I get a 404. What am I doing wrong?

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• Reusable non generic method for generic methods

  - by Jehof

  I have the following base interface public interface IHandler{ void Handle(IMessage message); } and an generic interface inheriting the base interface public interface IHandler<TMessage> : IHandler where TMessage : IMessage{ void Handle(TMessage message); } My classes can implement the interface IHandler<TMessage> mutiple times. IMessage is an base interface for messages and isn´t relevant here. Currently i´m implementing the interfaces as follows. public class ExampleHandler : IHandler<ExampleMessage>, IHandler<OtherExampleMessag>{ void IHandler.Handle(IMessage message){ ExampleMessage example = message as ExampleMessage; if (example != null) { Handle(example); } else { OtherExampleMessage otherExample = message as OtherExampleMessage; if (otherExample != null) { Handle(otherExample); } } public void Handle(ExampleMessage) { //handle message; } public void Handle(OtherExampleMessage) { //handle message; } } What bothers me is the way i have to implement the Handle(IMessage) method, cause in my opinion its many redundant code, and i have to extend the method each time when i implement a new IHandler<TMessage> interface on my class. What i´m looking for is a more generic way to implement the Handle(IMessage) method (maybe in a base class for Handlers), but i´m currently stuck how to do that.

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• Generic tree implementation in Java

  - by Ivan

  Is anyone aware of a generic tree (nodes may have multiple children) implementation for Java? It should come from a well trusted source and must be fully tested. It just doesn't seem right implementing it myself. Almost reminds me of my university years when we were supposed to write all our collections ourselves. EDIT: Found this project on java.net, might be worth looking into.

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• Datatype-generic programming libraries for Scala

  - by kohomologie

  I'm looking for a Scala library allowing for datatype-generic programming (like Scrap Your Boilerplate, for example). A list of libraries with appropriate links and short descriptions for each one would be a perfect answer.

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• How can I use generic here.

  - by Shantanu Gupta

  I am trying to use generic for the first time and trying to typecast my result returned from database to programmer defined data type. How can I do this. dsb.ExecuteQuery( "DELETE FROM CurrencyMaster WHERE CurrencyMasterId=" + returnValueFromGrid<int>(getSelectedRowIndex(), "CurrencyMasterId"));` private T returnValueFromGrid<T>(int RowNo, string ColName) { return Convert.ChangeType(dgvCurrencyMaster.Rows[RowNo].Cells[ColName].Value,T); }

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• Generic TryParse

  - by Piers Myers

  I am trying to create a generic extension that uses 'TryParse' to check if a string is a given type: public static bool Is<T>(this string input) { T notUsed; return T.TryParse(input, out notUsed); } this won't compile as it cannot resolve symbol 'TryParse' As I understand, 'TryParse' is not part of any interface. Is this possible to do at all?

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• Create a ASP.NET Generic gridview

  - by harold-sota

  I wont to create a User Control based in gridview that have the edit add delete incorporate, the problem is these: In the admin part of my web site i have to repeat the same action for view add delete update the data for different datasource. I wont to create a generic gridview that have incorporate these action. The gridview can take a xml file for configure him self dependently of the request for desplay the data. Any ideas how i can do it?

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• Go - Generic function using an interface

  - by nevalu

  Since I've a similar function for 2 different data types: func GetStatus(value uint8) (string) {...} func GetStatus(name string) (string) {...} I would want to use a way more simple like: func GetStatus(value interface{}) (string) {...} Is possible to create a generic function using an interface? The data type could be checked using reflect.Typeof(value)

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• c# array vs generic list

  - by L G

  Hi, i basically want to know the differences or advantages in using a generic list instead of an array in the below mentioned scenario Class Employee { private _empName; Public EmpName { get{return _empName;} set{_empName = value;} } } 1. Employee[] emp 2. List<Employee> emp can anyone please tell me the advantages or disadvaatges and which one to prefer

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• Kernel Error during upgrade or update commands

  - by Ashesh

  I am getting these errors during sudo apt-get update and upgrade... I tried all possible options no success. I recently upgraded to 13.04 and had problems with Broadcom WiFi. Fixed tat issues using the clean script... but looks like it did not install the Kernel properly.. Here is the o/p of the few scripts I ran: ashesh@ashesh-HPdv4:~$ sudo dpkg -r bcmwl-kernel-source (Reading database ... 175338 files and directories currently installed.) Removing bcmwl-kernel-source ... Removing all DKMS Modules Done. update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.8.0-25-generic cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/mtd/mtd.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/mtd/mtd.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/sfc/sfc.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/sfc/sfc.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/mellanox/mlx4/mlx4_core.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/mellanox/mlx4/mlx4_core.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/bnx2x/bnx2x.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/bnx2x/bnx2x.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/cnic.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/broadcom/cnic.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/qlogic/netxen/netxen_nic.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/qlogic/netxen/netxen_nic.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/brocade/bna/bna.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/net/ethernet/brocade/bna/bna.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/libfc/libfc.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/libfc/libfc.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/advansys.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/advansys.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/be2iscsi/be2iscsi.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/be2iscsi/be2iscsi.ko’: Input/output error cp: reading ‘/lib/modules/3.8.0-25-generic/kernel/drivers/scsi/bnx2i/bnx2i.ko’: Input/output error cp: failed to extend ‘/tmp/mkinitramfs_8gjKwQ//lib/modules/3.8.0-25-generic/kernel/drivers/scsi/bnx2i/bnx2i.ko’: Input/output error Bus error (core dumped) depmod: ../libkmod/libkmod-elf.c:207: elf_get_mem: Assertion `offset < elf->size' failed. Aborted (core dumped) I am not a techie but I need your support to resolve this without re-installation from scratch....

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