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  • How can I reinstall GRUB Bootloader on MBR after installing Kubuntu?

    - by Agnes
    I installed Ubuntu, but then installed Kubuntu over it (formated Ubuntu Partition) because Ubuntu is not compatible with almost any hardware on my PC. Problem is I'm stuck with an old GRUB that says Ubuntu in the options because in my attempts to make it compatible with my hardware I got an old Grub with an image with an Earth that says Debian. How can I replace the GRUB with the one Kubuntu is supposed to install. I don't want to modify just the text, or the command to install on /sdaX, I want to actually re-write the MBR with the latest grub (reinstall the bootloader). Thanks.

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  • Will Ubuntu be releasing an update for Cedar Trail Processors?

    - by Alan
    There is a file available on the Intel web site with the file name "cdv-gfx-drivers-1.0.1_bee.tar.bz2" and a date of July 6, 2012. It can be found by searching the Intel Download Center for the filename or the string "Linux* PowerVR Graphics/Media Drivers". The download page links to the file, release notes and a link, Enabling hardware accelerated playback that takes one to a page containing links to two pdf documents titled "Enabling Hardware Accelerated Playback for Intel® AtomTM Processor N2000/D2000 Series", one for Ubuntu and one for Fedora. The instruction and release notes speak to working with kernel 3.1.0 and since I do not feel I have the skills, knowledge or training to do anything else but, follow the instructions to the "T", I am very reluctant to try anything on my freshly updated 3.2.0 kernel. I would much rather use a Ubuntu supported kernel that applies these drivers and doesn't break anything in the process. Is it a case where this is so new that Canonical has not yet included these drivers but, soon will do so?

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  • How often do CPUs make calculation errors?

    - by veryfoolish
    In Dijkstra's Notes on Structured Programming he talks a lot about the provability of computer programs as abstract entities. As a corollary, he remarks how testing isn't enough. E.g., he points out the fact that it would be impossible to test a multiplication function f(x,y) = x*y for any large values of x and y across the entire ranges of x and y. My question concerns his misc. remarks on "lousy hardware". I know the essay was written in the 1970s when computer hardware was less reliable, but computers still aren't perfect, so they must make calculation mistakes sometimes. Does anybody know how often this happens or if there are any statistics on this?

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  • Spherical harmonics lighting interpolation

    - by TravisG
    I want to use hardware filtering to smooth out colors in texels of a texture when I'm accessing texels at coordinates that are not directly at the center of the texel, the catch being that the texels store 2 bands of spherical harmonics coefficients (=4 coefficients), not RGBA intensity values. Can I just use hardware filtering like that (GL_LINEAR with and without mip mapping) without any considerations? In other terms: If I were to first convert the coefficients back to intensity representations, than manually interpolate between two intensities, would the resulting intensity be the same as if I interpolated between the coefficient vectors directly and then converted the interpolated result to intensities?

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  • What technology to use for turn-based game server? [closed]

    - by mekanikus
    If I create a mobile turn-based game which could consist from 2 up to 6 players. I expect the server to support for about hundreds of game. And I aim for something free and not costly technology. What software and hardware recommendation would be enough for me? I've found some game server engine such as photon. But is it too much for a simple game? I'm thinking of using REST technology with F3 PHP server and Mysql. Will it be adequate? Will only one physical server enough? What is the hardware recommendation for the server?

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  • Why Your Firefox 21 Crash ?

    - by Anirudha
    Originally posted on: http://geekswithblogs.net/anirugu/archive/2013/06/25/why-your-firefox-21-crash.aspxEvery new version of Firefox Come with new features. Recently people using Firefox 21 Reported that Their Firefox has crashed after click on X-close button. What is the problem ? Actually Firefox have trouble with “hardware acceleration”. You need to disable it. Try to go to  Tools > options > Browsing > uncheck the hardware acceleration. This is one of the problem in Firefox. If you have any kind of trouble then I recommended you to try https://support.mozilla.org/en-US/questions/new for get official help & support For Firefox

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  • wireless not enabling, wire works fine

    - by sibby
    I have a built in wireless (with a switch & light on hardware for it) its a Sony Vaio E-series with ubuntu running along side windows 7, the button in the menu for enable wireless is greyed out, and in edit connections window, when i click the button to make it 'ON' it turns it 'off' immediately while the wireless button is switched on & the wireless light flashes once for 3 seconds(light on hardware), wireless works perfectly and the light stays on (solid) on windows 7, and it works fine with wired connection on Ubuntu, 1st time I am trying a Linux OS, everything else works perfectly.

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  • hi, i have a problem with windows 7 so I use ubuntu to bring back my files , but when I tried to open the files I have this message:

    - by user286972
    Error mounting /dev/sda1 at /media/ubuntu/B800C0C300C08A38: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=999,gid=999,dmask=0077,fmask=0177" "/dev/sda1" "/media/ubuntu/B800C0C300C08A38"' exited with non-zero exit status 13: ntfs_attr_pread_i: ntfs_pread failed: Input/output error Failed to read NTFS $Bitmap: Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details.

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  • Is there ongoing work in the kernel team to improve battery life under linux?

    - by leousa
    I have read in some forums that the kernel team is working on improving battery life and energy efficiency in linux. Unfortunately our community really lags behind windows and mac in that regard. I would like to read about the reasons why this difference exists with other platforms. Is it purely due to closed hardware specs from vendors or does it has to be with kernel design issues? Apple devices with unix cores have amazing battery times, but they also design their own hardware...just want to understand this issues in a less technical way I know that recent kernel updates in Ubuntu have improved the battery life in most computers, but I was wondering if there is still development going on and where can I read more about it. Thanks in advance

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  • Fresh install of 12.04 Kernel panic

    - by user70260
    I am attempting to install Ubuntu 12.04 on my computer. After the Ubuntu splash screen, the computer throws up this error: sr 2:0:1:0: [sr0] Unhandled error code Kernel panic - not syncing: Attempted to kill init! PID: 1, comm: run-init Not Tainted 3.2.0-23-generic #36-Ubuntu The computer hardware is as follows: Core 2 quad 9400, 8gb RAM, GTX 275, 3 Mech HD, 2 SSD, Win 7 install. I would like to dual boot Ubuntu on this computer if possible. I did try placing this disk in my laptop and booted successfully which leads me to believe the fault lies with the desktop. Under windows all hardware seems to work ok. Any ideas?

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  • Interface design where functions need to be called in a specific sequence

    - by Vorac
    The task is to configure a piece of hardware within the device, according to some input specification. This should be achieved as follows: 1) Collect the configuration information. This can happen at different times and places. For example, module A and module B can both request (at different times) some resources from my module. Those 'resources' are actually what the configuration is. 2) After it is clear that no more requests are going to be realized, a startup command, giving a summary of the requested resources, needs to be sent to the hardware. 3) Only after that, can (and must) detailed configuration of said resources be done. 4) Also, only after 2), can (and must) routing of selected resources to the declared callers be done. A common cause for bugs, even for me, who wrote the thing, is mistaking this order. What naming conventions, designs or mechanisms can I employ to make the interface usable by someone who sees the code for the first time?

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  • Amis Oracle OpenWorld Summary presentations

    - by JuergenKress
    AMIS Oracle OpenWorld 2013 Review Part 1 - Intro Overview Innovation, Hardware osvm, IAAS database. Watch the presentation here: AMIS Oracle OpenWorld 2013 Review Part 1 - Intro Overview Innovation, Hardware osvm, IAAS database AMIS Oracle OpenWorld 2013 Review Part 2 - Platform Middleware Publication AMIS Oracle OpenWorld 2013 Review Part 3 - Fusion Middleware WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Amis,OOW,Oracle OpenWorld,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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  • Any idea of what to do with an old PC?

    - by phineas
    I got an old PC for free, similar to that one. Additionlly, I'm a hobbyist programmer who does mainly python and java under a linux (mostly ubuntu) development environment. And now I wonder what I could do with such a piece of crappy hardware and would be pleased to get a good answer. It's one thing if you code your app that could run on almost any pc (or webbrowser) but another if you got an own hardware platform which you could extend or more generally customize the way you like. What I would like to hear from you: Are you in a similar situation? Have you already done a project like that? What would be your ideas?

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  • How to design an interface, where things need to be called in a specific sequence?

    - by Vorac
    The task is to configure a piece of hardware within the device, according to some input specification. This should be achieved as follows: 1) Collect the configuration information. This can happen at different times and places. For example, module A and module B can both request (at different times) some resources from my module. Those 'resources' are actually what the configuration is. 2) After it is clear that no more requests are going to be realized, a startup command, giving a summary of the requested resources, needs to be sent to the hardware. 3) Only after that, can (and must) detailed configuration of said resources be done. 4) Also, only after 2), can (and must) routing of selected resources to the declared callers be done. A common cause for bugs, even for me, who wrote the thing, is mistaking this order. What naming conventions, designs or mechanisms can I employ to make the interface usable by someone who sees the code for the first time?

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  • System Virtualization

    Methods and applications of system virtualization using Intel virtualization technology Intel Corporation - Intel - Companies - Product Support - Hardware

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  • pthreads: reader/writer locks, upgrading read lock to write lock

    - by ScaryAardvark
    I'm using read/write locks on Linux and I've found that trying to upgrade a read locked object to a write lock deadlocks. i.e. // acquire the read lock in thread 1. pthread_rwlock_rdlock( &lock ); // make a decision to upgrade the lock in threads 1. pthread_rwlock_wrlock( &lock ); // this deadlocks as already hold read lock. I've read the man page and it's quite specific. The calling thread may deadlock if at the time the call is made it holds the read-write lock (whether a read or write lock). What is the best way to upgrade a read lock to a write lock in these circumstances.. I don't want to introduce a race on the variable I'm protecting. Presumably I can create another mutex to encompass the releasing of the read lock and the acquiring of the write lock but then I don't really see the use of read/write locks. I might as well simply use a normal mutex. Thx

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  • Automated Oracle Schema Migration Tool

    - by Dave Jarvis
    What are some tools (commercial or OSS) that provide a GUI-based mechanism for creating schema upgrade scripts? To be clear, here are the tool responsibilities: Obtain connection to recent schema version (called "source"). Obtain connection to previous schema version (called "target"). Compare all schema objects between source and target. Create a script to make the target schema equivalent to the source schema ("upgrade script"). Create a rollback script to revert the source schema, used if the upgrade script fails (at any point). Create individual files for schema objects. The software must: Use ALTER TABLE instead of DROP and CREATE for renamed columns. Work with Oracle 10g or greater. Create scripts that can be batch executed (via command-line). Trivial installation process. (Bonus) Create scripts that can be executed with SQL*Plus. Here are some examples (from StackOverflow, ServerFault, and Google searches): Change Manager Oracle SQL Developer Software that does not meet the criteria, or cannot be evaluated, includes: TOAD PL/SQL Developer - Invalid SQL*Plus statements. Does not produce ALTER statements. SQL Fairy - No installer. Complex installation process. Poorly documented. DBDiff - Crippled data set evaluation, poor customer support. OrbitDB - Crippled data set evaluation. SchemaCrawler - No easily identifiable download version for Oracle databases. SQL Compare - SQL Server, not Oracle. LiquiBase - Requires changing the development process. No installer. Manually edit config files. Does not recognize its own baseUrl parameter. The only acceptable crippling of the evaluation version is by time. Crippling by restricting the number of tables and views hides possible bugs that are only visible in the software during the attempt to migrate hundreds of tables and views.

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  • Building Paypal based membership website - total noob - would appreciate help

    - by Ali
    this is a follow up on my question on paypal integration. I'm working ona membership site for racing fans. My membership site has 3 membership levels - free, gold and premium. When a user signs up he/she can gets a free membership on the spot but has the option to upgrade to a gold membership for 4 Dollars a month or a premium membership for 10 Dollars a month. I've gone through the paypal integration guide a few times though and have a vague understanding of how to get this to work. I think the recurring payments option would be fine enough - however I don't know how do I implement this in my system. Like when a user decides to go for a paid account i.e. Gold or premium from basic - what should I do on both my code side and on the paypal account side - I'd really appreciate if anyone would outline what I'd have to do here. Plus when a user decides to upgrade from lets say a Gold to a premium account - there is the issue of computing how much should be charged to upgrade his/her account eg: a user has been billed for 4 dollars and the next day opts to go for a premium account so assuming that the surplus for the rest of the month is 5 dollars and further from that all payments would be recurring 10 dollars monthly - how do I implement this? And in case a user decides to downgrade from a premium account of 10 dollars a month to a gold account of 4 dollars a month - how do I handle the surplus which would have to be refunded for that month alone and changing the membership? And like wise if someone wishes to cancel membership and go to having a free account - how do I refund whatever is owed and cancel the subscription. I'm sorry if it sounds like I'm asking to be spoon fed :( I'm quite new to this and this is for a client and I would really appreciate all the help here and really have to get this working right. Thanks again everyone - waiting for all your replies.

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  • pthreads: reader/writer locks, upgrading read lock to write lock

    - by ScaryAardvark
    I'm using read/write locks on Linux and I've found that trying to upgrade a read locked object to a write lock deadlocks. i.e. // acquire the read lock in thread 1. pthread_rwlock_rdlock( &lock ); // make a decision to upgrade the lock in threads 1. pthread_rwlock_wrlock( &lock ); // this deadlocks as already hold read lock. I've read the man page and it's quite specific. The calling thread may deadlock if at the time the call is made it holds the read-write lock (whether a read or write lock). What is the best way to upgrade a read lock to a write lock in these circumstances.. I don't want to introduce a race on the variable I'm protecting. Presumably I can create another mutex to encompass the releasing of the read lock and the acquiring of the write lock but then I don't really see the use of read/write locks. I might as well simply use a normal mutex. Thx

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  • Stopping process in /etc/inittab kills spawned process. Doesn't happen in rc.local.

    - by Paul
    Hi, I'm trying to execute a firmware upgrade while my programming is running in inittab. My program will run 2 commands. One to extract the installer script from the tarball and the other to execute the installer script. In my code I'm using the system() function call. These are the 2 command strings below, system ( "tar zvxf tarball.tar.gz -C / installer.sh 2>&1" ); system( "nohup installer.sh tarball >/dev/null 2>&1 &" ); The installer script requires the tarball to be an argument. I've tried using sudo but i still have the same problem. I've tried nohup with no success. The installer script has to kill my program when doing the firmware upgrade but the installer script will stay alive. If my program is run from the command line or rc.local, on my target device, my upgrade works fine, i.e. when my program is killed my installer script continues. But I need to run my program from /etc/inittab so it can respawn if it dies. To stop my program in inittab the installer script will hash it out and execute "telinit q". This is where my program dies (but thats what I want it to do), but it also kills my installer script. Does anyone know why this is happening and what can I do to solve it? Thanks in advance.

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