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• Dual boot (Win 7 & Ubuntu 13.10 clock problem

  - by peter

  I'm a "newbie" to Ubuntu, but I've been wrestling with this problem for several hours and don't seem to be able to solve it: When I set the time in Windows (Indianapolis, Eastern U.S. time zone) and then re-boot to Ubuntu, the computer time goes to Hawaiian time. When the time is set in Ubuntu, and the computer is rebooted to Windows the time is advanced by 5 hours. I've set the time in the BIOS, and it seems to make no difference. I've tried setting the time from "automatic" to "manual", all with the same result. Not a big problem, but it shows some underlying glitch. Could anyone explain?

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• Monitor Settings

  - by user171625

  I'm having some viewing issues when I plug my projector in to view video. At first, the video didn't appear through the projector, only the computer screen. The projector just showed the desktop. I restarted and tried again, and it worked at first, but then the picture from the streaming video would freeze (the audio continued working) and I could do nothing. I had to manually shut down the computer. This happened a few more times before I gave up. Is there anything I can do about this?

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• Screen gets garbled on some web sites

  - by user10565

  I have a Gateway notebook with graphics card 01:05.0 VGA compatible controller: ATI Technologies Inc RS690M [Radeon X1200 Series] with open source driver Linux version 2.6.32 -28 - generic. No other operating system on the computer. When I am using firefox to browse the web, everything normally works just fine except that when I attempt to access some particular web pages the screen completely messes up going mostly white with various streaks, etc., although I can access other pages of the same site without problems. When I run the cursor over the garbled screen, bits of the image recompose themselves, at least partially, and I can continue to open the applications window, or turn the computer off, or open the terminal, or take screen shots, etc., although all menus are unreadable. Also, when I zoom in on Google Earth the screen completely messes up. At all other times, there are no apparent problems. Any ideas?

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• Desktop in Kubuntu lacks bars and quite everything after trying to apply Plymouth fix for proprietary drivers

  - by Michcioperz

  I'm running Kubuntu 13.10, my computer's graphics card is Nvidia GT 520. I tried to fix that Plymouth's problem with proprietary graphics driver using an old script I found on the internet (it was coded for Natty, now that I think about it I shouldn't have done it). I ran that script and rebooted my computer. First incorrect behaviour I noticed was that Plymouth only displayed its text splash only on 1/4th of the screen, though when I pressed Esc key the logs were displaying correctly. Main problem appeared when I logged in. All my desktop's windows lack menu bar, can't be closed with Alt-F4, and they don't appear on the task bar. I tried fixing it by reinstalling GRUB a few times, purging /etc/grub.d and /boot/grub, but only the text splash issue was fixed. How can I fix that?

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• laptop will not boot after attempting upgrade to 13.10

  - by naerwenya

  I wanted to update my OS to the new 14.04 LTS. I was running 12.04 LTS before and followed the advice that upgrades should be done in steps. I first upgraded to 12.10, which seemed to work fine, and later to 13.10. This was all done through the Software Manager. After the last upgrade, I am no longer able to boot up my computer. The GNU GRUB menu opens up, but after selecting Ubuntu, it just stalls with a blank purple screen. If I select one of the other kernels, it also stalls after "Loading initial ramdisk...". I can't get into the Recovery Menu, either. I'm still rather new to Linux and may have possibly made the situation worse. Unfortunately, nothing has worked yet. I tried reinstalling from a flash drive and on my first attempt, the wizard recognised a previous installation. Unfortunately, the wizard also didn't like how my partitions were set up (I didn't change anything) and gave an error before closing. Unfortunately, I didn't write the error down, but it was about the boot partition. On the next attempt and ever since, the installation wizard has stated that "This computer currently has no detected operating systems." This is strange, because I could see the disk and even access my files when booting up from the USB. At this point, I decided to back up my important files using dropbox. Before losing all my files, I wanted to try the Boot-Repair tool, which also produced no results, and the files are no longer visible when booting from USB. The link to the Boot-Repair log is at http://paste.ubuntu.com/7457249/. If I then proceed through to the "Something else" installation option, I can see that the partitions still exist. This is what they look like: /dev/sda free space (size indicated 1MB) /dev/sda1 efi (33MB of 98 MB used) /dev/sda2 efi (352634MB of 746330MB used) /dev/sda3 swap (3725MB, none used) free space (0MB) Is there any way I might be able to get my computer to work and preserve my files as well?

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• Ubuntu 14.10 no GUI or term login

  - by Lito

  I have updated yesterday my Ubuntu 14.10 installation with apt-get dist-upgrade. I was working all afternoon and after that I have rebooted computer. Once done it, lightdm doesn't starts (only gnome logo) and I can not view any of Ctrl + Shift + [1-6] terminals (cursor is blinking). I have read a lot of posts with no success: nividia/intel conflicts (I have a laptop with an Intel graphic card) I have enabled nomodeset and tried all this options My computer boots to a black screen, what options do I have to fix it? I have repaired grub I can load recovery/livecd/windows and mount partitions and network without problem I have all packages and system updated Here my logs. X11 not shows any error or problem, is loading all needed drivers without problem. How can I raise the level of debug? Best regards.

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• I have installed Ubuntu 12.04, now my Windows Vista doesn't boot

  - by andraz

  I have a Windows Vista computer. And I've installed Ubuntu 12.04 on it. But now, when I boot my device it doesn't ask me which OS I want to choose, instead it just boots in Ubuntu. Please help me! I don't know what to do... :/ P.S.: I've created a partition with the Ubuntu installer. My hard disk drive is 250 gb (there around) and the partition is 30gb big... P.S.S.: It's very important because is my mom's computer and there are some very important files on it... :(

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• unresposive cursor

  - by user289294

  Running Lucid. Computer worked fine last night, went to bed and found the following problem this morning: (so no hard or software changes) Computer boots up, screen displays normally; date & time correct, background normal, toolbars OK, everything looks normal. Cursor moves round screen in the traditional manner but clicking produces nothing, not left, right or centre. Nothing will open. Tried restarting, using different USB ports and a different mouse. Have reduced system to minimum; monitor keyboard mouse only. Does anyone have a suggestion? Thanks in advance, David D

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• Ubuntu 12.10 hasa no wireless connectivity on Dell Inspiron 1520

  - by Jorge Tijerina

  I have just installed Ubuntu for the first time ever. I have just installed it in a Dell Inspiron 1520 that came pre installed with Windows Vista and i currently run both of the OS (I just choose when the computer starts up). The wifi definitely works on the computer since i used it to download Ubuntu in the first place when I was using Vista. The Network Manager says that I only have a 'Wired' Network and it doesn't have any other options to choose from. I connected the Laptop into a wired connection and downloaded the 'Wicd Network Manager' but it had no effect either. From there I continued to go into 'Software Sources' and installed the wireless drive but that had no effect either. So... What can I do?

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• What is the "don't force full gpu scalling" configuration in the newest Nvida driver settings?

  - by wild_oscar

  I have a Zotac Ion board on a computer running Linux ad I had the driver version 295.xx. I was trying to run a 1080 video on XBMC and, because playback was a bit sluggish, part of my (unsuccessful) attempt at making it run smoothly was to upgrade the Nvidia driver. The problem is that the computer is connected by HDMI to a Pioneer A/V system - which in turn is connected to the TV (also through HDMI). When I created this set up I didn't get any image on my tv until I Unchecked "force full gpu scaling" in "Flat Panel Scaling". After upgrading the Nvidia driver I no longer have image. Upon investigating, I saw on the release changelog: Removed Flat Panel Scaling configurability in nvidia-settings. Any desired scaling can be configured through the new "ViewPortIn" and "ViewPortOut" MetaMode attributes. I know very little about this, however, so I'm lost. What would the correct configuration be with these new ViewPortIn/Out options to achieve the same result as "unchecking force full gpu scalling"?

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• Wobbly windows not working in compiz for 12.04

  - by f22christian

  I'm very new at Ubuntu and am still trying to figure everything out. I recently downloaded Compiz settings manager and enabled wobbly windows. Nothing. So I uninstalled it and re-installed it and still, nothing. I've ran all the updates and updated the graphics drivers and I still have nothing. I have a Sony Vaio with a Intel® Core™2 CPU T5500 @ 1.66GHz × 2 . Its a 2009 computer, so I think it should be able to work just fine. Please help! I'm not a "computer wiz", so you'll need to put it in simpler terms for me. And yes, I am I do have Unity 3D. Thanks!

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• How can I make my Java desktop application to run on different computers in a network locally and updating same mysql database?

  - by JaMpa

  I have developed Java desktop application for registration of students in the computer laboratories in our college, but what I need is to make this application whenever it runs on any computer (Windows XP machines) on the laboratory each and every data filled by the college students goes to the same MySql database (through WAMP server) running on the server machine (Win Server 2003). Also, I need this application to run during booting of windows computers in the laboratory for the purpose when any student tries to switch on any PC in the comp lab before interfacing the desktop icons should sign in through user name and password when he has already registered or signing up in order for getting the access.

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• Blank screen after logging in

  - by Dnarlock08

  I just installed the 64 bit version onto my laptop. It is the only operating system on the computer. After the initial setup and restart, I tried to log in, but after I typed my password and hit enter, the screen just went black. Tried to restart several times and had the same problem. Not sure what to do. I tried to use the 32 bit version instead but it doesn't even install. My computer is 64 bit, 200 g hard drive, 2 ghz processor, 4 g ram

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• Problem after upgrading from 11.10 to 12.04

  - by Veena Kumari

  I had installed Ubuntu 11.04 through CD alongside windows. I got a problem here in upgradation when I upgraded my Ubuntu 11.10 version to 12.04.There were many errors too while installing upgrades.. The package got broken. After restarting the computer,It should appear Ubuntu 12.04,even here It is appearing ubuntu 11.10 with four dots just moving one by one and does not proceeds further,hangs here!! Windows is running fine,I restarted computer many times,plugged out the charger...Nothing is working. How to solve this issue?? I'm not a very frequent user of all this.. Please guide me...

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• Font substitution

  - by sjdh

  What happens when you open a .docx document that is written in a font not available on your computer? How can you find the name of original font? I guess writer select automatically an other font. I tried to open a document written in Japanese. Writer shows the fond Droid Sans, and all the characters except number and Roman letters appear as squares. After changing to Droid Sans Japanese a few boxes are still left. I guess I have to install the original font on my computer, but I do not know the name of the font.

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• Using RabbitMQ (Java client), is there a way to determine if network connection is closed during con

  - by MItch Branting

  I'm using RabbitMQ on RHEL 5.3 using the Java client. I have 2 nodes (machines). Node1 is consuming messages from a queue on Node2 using the Java helper class QueueingConsumer. QueueingConsumer consumer = new QueueingConsumer(channel); channel.basicConsume("MyQueueOnNode2", noAck, consumer); while (true) { QueueingConsumer.Delivery delivery = consumer.nextDelivery(); ... Process message - delivery.getBody() } If the interface is brought down on Node1 or Node2 (e.g. ifconfig eth1 down), the client (above) never knows the network isn't there anymore. Does RabbitMQ provide some type of configuration on the Java client that can be used to determine if the connection has gone away. Shutting down the RabbitMQ server on Node2 will trigger a ShutdownSignalException, which can be caught and the app can go into a reconnect loop. But bringing down the interface doesn't cause any type of exception to happen, so the code will be waiting forever on consumer.nextDelivery(). I've also tried using the timeout version of this call. e.g. QueueingConsumer consumer = new QueueingConsumer(channel); channel.basicConsume("MyQueueOnNode2", noAck, consumer); int timeout_ms = 30000; while (true) { QueueingConsumer.Delivery delivery = consumer.nextDelivery(timeout_ms); if (delivery == null) { if (channel.isOpen() == false) // Seems to always return true { throw new ShutdownSignalException(); } } else { ... Process message - delivery.getBody() } } but appears that this always returns true (even though the interface is down). I assume registering for the ShutdownListener on the connection will yield the same results, but haven't tried that yet. Is there a way to configure some sort of heartbeat, or do you just have to write custom lease logic (e.g. "I'm here now") in order to get this to work?

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• Using two versions of the same assembly (system.web.mvc) at the same time

  - by Joel Abrahamsson

  I'm using a content management system whose admin interface uses MVC 1.0. I would like to build the public parts of the site using MVC 2. If I just reference System.Web.Mvc version 2 in my project the admin mode doesn't work as the reference to System.Web.Mvc.ViewPage created by the views in the admin interface is ambiguous: The type 'System.Web.Mvc.ViewPage' is ambiguous: it could come from assembly 'C:\Windows\assembly\GAC_MSIL\System.Web.Mvc\2.0.0.0__31bf3856ad364e35\System.Web.Mvc.dll' or from assembly 'C:\Windows\assembly\GAC_MSIL\System.Web.Mvc\1.0.0.0__31bf3856ad364e35\System.Web.Mvc.dll'. Please specify the assembly explicitly in the type name. I could easily work around this by using binding redirects to specify that MVC 2 should always be used. Unfortunately the content management systems admin mode isn't compatible with MVC 2. I'm not exactly sure why, but I start getting a bunch of null reference exceptions in some of it's actions when I try it and the developers of the CMS have confirmed that it isn't compatible with MVC 2 (yet). The admin interface which is accessed through domain.com/admin is not physically located in webroot/admin but in the program files folder on the server and domain.com/admin is instead routed there using a virtual path provider. Therefor, putting a separate web.config file in the admin folder to specify a different version of System.Web.Mvc for that part of the site isn't an option as that won't fly when using shared hosting. Can anyone see any solution to this problem? Perhaps it's possible to specify that for some assemblies a different version of a referenced assembly should be used?

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• How to achieve "Blendability" when using DataServiceCollection in my ViewModel

  - by andlju

  I'm looking at using oData endpoints in my Silverlight client. Naturally, I'm doing MVVM and I want the project to be nice and "Blendable" (i.e. I must be able to cleanly use static data instead of the oData endpoints when in design mode.) Now to the problem. I'd like to use the DataServiceCollection in my ViewModels, since it allows for nice bindable collections without having to worry too much with BeginExecute/EndExecute etc. Now, let's look at some code. My Model interface looks like this: public interface ITasksModel { IQueryable<Task> Tasks { get; } } The oData endpoint implementation of that interface: public class TasksModel : ITasksModel { Uri svcUri = new Uri("http://localhost:2404/Services/TasksDataService.svc"); TaskModelContainer _container; public TasksModel() { _container = new TaskModelContainer(svcUri); } public IQueryable<Task> Tasks { get { return _container.TaskSet; } } } And the "Blendable" design-time implementation: public class DesignModeTasksModel : ITasksModel { private List<Task> _taskCollection = new List<Task>(); public DesignModeTasksModel() { _taskCollection.Add(new Task() { Id = 1, Title = "Task 1" }); _taskCollection.Add(new Task() { Id = 2, Title = "Task 2" }); _taskCollection.Add(new Task() { Id = 3, Title = "Task 3" }); } public IQueryable<Task> Tasks { get { return _taskCollection.AsQueryable(); } } } However, when I try to use this last one in my ViewModel constructor: public TaskListViewModel(ITasksModel tasksModel) { _tasksModel = tasksModel; _tasks = new DataServiceCollection<Task>(); _tasks.LoadAsync(_tasksModel.Tasks); } I get an exception: Only a typed DataServiceQuery object can be supplied when calling the LoadAsync method on DataServiceCollection. First of all, if this is the case, why not make the input parameter of LoadAsync be typed as DataServiceQuery? Second, what is the "proper" way of doing what I'm trying to accomplish?

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• shouldAutorotateToInterfaceOrientation called several times in a row without any rotation

  - by Mike

  I am trying to implement some interface changes in my app, based on the device rotation. My app is a view based app. So, its main view controller has a didload method. The app starts in portrait. Almost all changes on the device orientation triggers the shouldAutorotateToInterfaceOrientation method but this method is not called when the device is put on portrait, after coming from any landscape orientation. While debugging the app, I have put a NSLog(@"orientation=%d", interfaceOrientation); on my shouldAutorotateToInterfaceOrientation method, and what I see is quite strange: When I run the app, shouldAutorotateToInterfaceOrientation is called 6 times before the app's interface even appears. Every time it runs, it reports a different number for the orientation: the order it reports on console is: portrait, portrait, portrait, landscape right, landscape left, upside down) (????). During this time the app is just beginning. All 6 times the debugger reports the method being run by the app's delegate. So, here comes the questions: WHy shouldAutorotateToInterfaceOrientation is not being called when the device enters on portrait? Why is this method running 6 times called by the delegate even before the app starts and shows its interface if no rotation is being done? thanks.

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• WCF deadlock when using callback channel

  - by mafutrct

  This is probably a simple mistake, but I could not figure out what was wrong. I basically got a method like this: [ServiceBehavior ( ConcurrencyMode = ConcurrencyMode.Reentrant, InstanceContextMode = InstanceContextMode.PerSession, IncludeExceptionDetailInFaults = true) ] public class Impl : SomeContract { public string Foo() { _CallbackChannel.Blah(); return ""; } } Its interface is decorated: [ServiceContract ( Namespace = "http://MyServiceInterface", SessionMode = SessionMode.Required, CallbackContract = typeof (WcfCallbackContract)) ] public interface SomeContract { [OperationContract] string Foo (); } The service is hosted like this: ServiceHost host = new ServiceHost (typeof (Impl)); var binding = new NetTcpBinding (); var address = new Uri ("net.tcp://localhost:8000/"); host.AddServiceEndpoint ( typeof (SomeContract), binding, address); host.Open (); The client implements the callback interface and calls Foo. Foo runs, calls the callback method and returns. However, the client is still struck in the call to Foo and never returns. The client callback method is never run. I guess I made a design mistake somewhere. If needed, I can post more code. Any help is appreciated.

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• Coding a parser for a domain specific language in Java

  - by Bruno Rothgiesser

  We want to design a simple domain specific language for writing test scripts to automatically test a XML-based interface of one of our applications. A sample test would be: Get an input XML file from network shared folder or subversion repository Import the XML file using the interface Check if the import result message was successfull Export the XML corresponding to the object that was just imported using the interface and check if it correct. If the domain specific language can be declarative and its statements look as close as my sentences in the sample above as possible, it will be awesome because people won't necessarily have to be programmers to understand/write/maintain the tests. Something like: newObject = GET FILE "http://svn/repos/template1.xml" reponseMessage = IMPORT newObject newObjectID = GET PROPERTY '/object/id/' FROM responseMessage (..) But then I'm not sure how to implement a simple parser for that languange in Java. Back in school, 10 years ago, I coded a language parser using Lex and Yacc for the C language. Maybe an approach would be to use some equivalent for Java? Or, I could give up the idea of having a declarative language and choose an XML-based language instead, which would possibly be easier to create a parser for? What approach would you recommend?

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• "Best" language /architecture for browser-based app with ODBC and sockets? (subjective)

  - by mawg

  Sorry to ask a subjective question, but I would welcome some advice. I am an experienced programmer of embedded s/w, but haven't done much network programming, although I have done a fair bit of hobbyist PHP. Anyway, I have to develop what is probably a fairly general type of app, as shown in this crude diagram --------------------------------------------------------------------------------- | Browser / user interface Takes input from user form and writes data to d/b. | | Also gets data and updates browser contents when when d/b contents are changed | | because of info received over TCP/IP. | |________________________________________________________________________________| | ODBC | |_______________________________________________________________________________| | database | |_______________________________________________________________________________| | ODBC | |_______________________________________________________________________________| | Socket (TCP/IP) | | Send data out when d/b is updated from browser. | | Also, update d/b when data are received over TCP/IP. | |_______________________________________________________________________________| As I say, I imagine this to be a fairly typical architecture? Am I right? Then client is insisting on MSIE - unless I can show compelling technical reasons for FireFox or other then it will have to be MSIE (are there any compelling technical reasons?). So, with MIE (almost) a given, I had though to use PHP, since I know it, but the client seems awfully keen on Java (which ought to be OK since I am conversant with C++) it woudl seem to make sense to use the same language for the "upper" interface between the web pages (which that app generates) and the d/b, and for the "lower" interface between the d/b and the socket. (a single language means a single set of tools since text approach, etc) So, the (probably highly subjective) question is "which language shoudl I choose". As I say, the client is keen on Java. Any compelling reason why not? Is it generally a good choice for the sort of thing described here? Any other hints & tips gratefully appreciated (and up-voted): URLs, books, tool chain suggestions, etc, etc

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• Create an ASMX web service from a WSDL file

  - by metanaito

  I have a WSDL file and I am trying to create a web service that conforms to the WSDL. I've created clients using WSDL files that consume an existing service, but I've never created a web service that needed to follow a specific WSDL. I've gone as far as using: wsdl.exe mywsdl.wsdl /l:VB /serverInterface Now I've got a .vb file generated from that WSDL. However I am not sure what I'm supposed to do with this VB file. It looks like it's got a public interface in there but no class that implements the interface. It also has a bunch of partial classes for the types in the WSDL. I was expecting there to be some sort of stub where I put in the code to complete the service calls. I've only created simple web services before and none of them used public interfaces so I'm unfamiliar with what is going on here. At this point I'm not sure how I use the generated .vb file and make it work with an .asmx file and what additional coding is needed to complete the interface.

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• Webforms MVP Passive View - event handling

  - by ss2k

  Should the view have nothing event specific in its interface and call the presenter plain methods to handle events and not have any official EventHandlers? For instance // ASPX protected void OnSaveButtonClicked(object sender, EventArgs e) { _Presenter.OnSave(); } Or should the view have event EventHandlers defined in its interface and link those up explicitly to control events on the page // View public interface IView { ... event EventHandler Saved; ... } // ASPX Page implementing the view protected override void OnInit(EventArgs e) { base.OnInit(e); SaveButton.Click += delegate { Saved(this, e); }; } // Presenter internal Presenter(IView view,IRepository repository) { _view = view; _repository = repository; view.Saved += Save; } The second seems like a whole lot of plumbing code to add all over. My intention is to understand the benefits of each style and not just a blanket answer of which to use. My main goals is clarity and high value testability. Testability overall is important, but I wouldn't sacrifice design simplicity and clarity to be able to add another type of test that doesn't lead to too much gain over the test cases already possible with a simpler design. If a design choice does off more testability please include an example (pseudo code is fine) of the type of test it can now offer so I can make my decision if I value that type of extra test enough. Thanks!

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• WPF creating custom control - creating control like SpinBox extending TextBox

  - by veedoo

  Hi, What is the best way to extend a control? Lets choose for example SpinBox - we want to extend TextBox to SpinBox - just to add two buttons on the right side, which each one on click checks if Text property is a valid number and if it is increases or decreases the value by 1. Suposse that we have a lot of code using TextBox (Text, IsReadOnly properties and bindings etc.) so we want to replace TextBox by SpinBox without touching rest of the code. 1) we can inherit TextBox - so we have exactly the same interface, but how to add the buttons ?? 2) we can inherit from some layout control - eg. DockPanel - we can add buttons, but we lose TextBox interface. 3) after quick read about ControlTemplates I'm not sure, but I believe that we can add buttons and their logic using ControlTemplates 4) like about templates I'm not sure, but I hope we can inherit decorator class to create decorator with the buttons - we lose interface, but can add TextBox as a child I think that the best solutions is to combine 3) and 4) - create a decorator class and use it in a control template for TextBox. I would be grateful for your ideas and simple code how to implement 3 and 4, especially with code (c#), not xaml. Regards

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