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• Ubuntu 12.10 Unity Dash transparency problem

  - by madox2

  I have just upgraded my Ubuntu 12.04 to 12.10 and there is following problem. When I press super button to show Unity Dash I get wrong background image behind the dash box. Especially I can see part of the bottom of the screen. Also when I set transparency to top panel the background behind is not correct. Here is an example with Mc Duck picture: Unity Mc Duck example Do you have any ideas whats wrong? My system preferences: Ubuntu 12.10 32-bit Intel® Pentium(R) CPU G840 @ 2.80GHz × 2 GeForce GTS 450/PCIe/SSE2 Any help will be highly appreciated!

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• Not able to suspend or hibernate

  - by Tim

  My Ubuntu 10.10 on my laptop Lenovo T400 is not able to suspend or hibernate. Whenever I click Suspend or Hibernate, the moon LED on the bottom of the lid flashes a few seconds, the screen quickly shows something like "some devices fail to suspend, error 5", and then the moon LED goes off and the display still has ambient light illumination. I suppose in suspend or hibernation state, the display should have no illumination, just like when the laptop is turned off, right? If I press any key, the unlock screen dialogue will pop out. I searched a little on the internet, and installed 'acpi-support' according to some advice but it does not help. Any suggestions to solve this problem? Thanks and regards! ADDED: Laptop specifications: CPU Intel Mobile Core 2 Duo P8800 @ 2.66GHz Penryn 45nm Technology RAM 1.9GB Single-Channel DDR3 @ 532MHz (7-7-7-20) Motherboard LENOVO 2764CTO (None) Graphics ThinkPad Display 1440x900 @ 1440x900 ATI Mobility Radeon HD 3400 Series (Lenovo) Hard Drives 244GB Western Digital WDC WD2500BEVS-08VAT2 (SATA) Optical Drives HL-DT-ST DVDRAM GSA-U20N AZCDW EFCPUZ452 SCSI CdRom Device AZCDW EFCPUZ452 SCSI CdRom Device Audio Conexant 20561 SmartAudio HD

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• I can't get suspend, hibernate and shutdown to work in Ubuntu 12.04

  - by Fostext

  I recently built a computer with these specs: Asus Motherboard, Intel i3 3.3 GHz dual processor, 8 GB of RAM. I installed 12.04 on a brand new hard drive. I partitioned the hard drive between root, home and swap like I have often read how to do. I cannot get this machine to properly shutdown. I have to hold the power button down now. Although, for the first few days it properly shutdown. I also cannot get the system to hibernate or suspend properly. I have read tons on this and watched many YouTube tutorials on how to fix both, but the computer never wakes up after suspend or hibernate. It just stays on a black screen. Can anyone help? I love 12.04 so far, but these setbacks are making me worried about stability and power management issues. Also, I wonder if it's really bad for the hard drive to force the CPU to shutdown.

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• Low process priority problem

  - by Svepe

  I have just set Ubuntu 12.04 64bit with Cinnamon desktop and 3.5.0-030500 kernel on my new laptop with IvyBridge i7. I decided to test its performance by running a single threaded CPU-hungry program that I often use for camera calibration. Unfortunately, it ended up running much slower than I have ever expected. After some investigation it turned out that the program priority is automatically changed from normal to low which makes the program even slower. I have also noticed that all user programs such as Skype and Firefox are set to low priority. I tried manually resetting the priority to normal or even very high using the "renice" command, which works temporary until the kernel scheduler (I guess) resets the priority to low. Is this a normal behaviour and how can I overcome the problem with slowing down the execution? P.S. I also tried with the 3.2 kernel, but the problem is still present.

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• Direct X-forwarding

  - by Sean Houlihane

  I'm struggling to set up X-forwarding between 2 different machines on my local network and my ubuntu desktop. I'm able to connect using ssh x-forwarding one one machine, but the other machine (a Qnap TS-219P II) seems to have a less functional build of SSH on it, and I'd rather use a simpler approach. I've set $DISPLAY, and done 'xauth list $DISPLAY' on the desktop, then 'xauth add ' on the remote machine. From the remote machine, I just get xterm xterm Xt error: Can't open display: 192.168.0.4:0.0 Now, oddly, if I connect via ssh -X, there is a different magic cookie for the tunnelled port (but neither seems to work). I'm wondering if there is a port which needs to be enabled to permit X connections from the LAN? If so, how? The proper solution might be to re-build all the packages which are preventing X-forwarding from working on my QNAP machine, but lets assume for the purposes of this question that I've tried building enough packages on that architecture already and want to run X without the overhead of encryption.

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• Why use an OO approach instead of a giant "switch" statement?

  - by James P. Wright

  I am working in a .Net, C# shop and I have a coworker that keeps insisting that we should use giant Switch statements in our code with lots of "Cases" rather than more object oriented approaches. His argument consistently goes back to the fact that a Switch statement compiles to a "cpu jump table" and is therefore the fastest option (even though in other things our team is told that we don't care about speed). I honestly don't have an argument against this...because I don't know what the heck he's talking about. Is he right? Is he just talking out his ass? Just trying to learn here.

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• Faulty memtest result

  - by dhojgaard

  I've been a bit suspicious about my RAM lately. They seem not work like i expect them to. For instance i run a lot of Virtual Test Environments in VMware Workstation and lately Ubuntu starts to lag just running 4 virtual machines each dedicated 512 MB. BTW im having 6GB memory on my laptop. This did not use to be a problem for me on my last laptop that even had a lot lower CPU resources. So i was led to try a memtest after reading some websites about RAM testing. So i did a memtest overnight but when i woke up this morning i was just looping and i could not Exit or do anything. It was just looping the number of errors besides test 7 which you can see in the lower right part of the screenshot. Can anyone interpret this screenshot for me? Do i have a faulty set of RAMs?

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• Repacked proprietary software keeps updating the same deb

  - by Johannes

  I repacked a proprietary program delivered as tar file to a deb file for having a company wide repository. I used reprepro to set up a repository and signed it. A unix timestamp is faking a versioning numbering, so I can have different (real) versions installed at the same time. Almost everything works as expected. The deb file looks like this: mysoft8.0v6_1366455181_amd64.deb Only problem on a client machine it tries to install the same deb file over and over again because it thinks its an update. What do I miss: control file in deb package looks like this: Package: mysoft8.0v6 Version: 1366455181 Section: base Priority: optional Architecture: amd64 Installed-Size: 1272572 Depends: Maintainer: me Description: mysoft 8.0v6 dpkg repackaging and the config in the repository: /mirror/mycompany.inc/conf/distributions: Origin: apt.mycompany.inc Label: apt repository Codename: precise Architectures: amd64 i386 Components: main Description: Mycompany debian/ubuntu package repo SignWith: yes Pull: precise Help much appreciated Added guide: This Is the guide I used to create the repository.

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• circle - rectangle collision in 2D, most efficient way

  - by john smith

  Suppose I have a circle intersecting a rectangle, what is ideally the least cpu intensive way between the two? method A calculate rectangle boundaries loop through all points of the circle and, for each of those, check if inside the rect. method B calculate rectangle boundaries check where the center of the circle is, compared to the rectangle make 9 switch/case statements for the following positions: top, bottom, left, right top left, top right, bottom left, bottom right inside rectangle check only one distance using the circle's radius depending on where the circle happens t be. I know there are other ways that are definitely better than these two, and if could point me a link to them, would be great but, exactly between those two, which one would you consider to be better, regarding both performance and quality/precision? Thanks in advance.

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• No 'Hardware' tab in audio and no profiles

  - by Gene

  If I run the 12.x ubuntu (latest May 2012) from the CD, I get full audio settings, and sound playing in speaker. Profiles let me change analog to digital in/out. Once I run install from the same CD onto the laptop HD, once it boots the first time, after selecting audio settings, there is no 'Hardware' tab and no way to change profiles. Worst part is the audio device is set to SPDIF so nothing comes out of the speakers. Very off how booting off the CD I can get analog audio, and installing to HD and booting seems to limit the profile to something useless. Laptop is a 5 year old Dell D820 with Nvidea 128meg video on a 1920x1200 screen and T7200 CPU. I suspect if I could get the damn HARDWARE tab back in audio settings, I could just select the proper Analog profile - just as is the case if running from a boot CD. Searched the web, no similar problems found... any help appreciated!

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• IBM simule le cerveau d'un singe avec son supercalculateur Blue Gene/Q qui a émulé 530 milliards de neurones

  IBM simule le cerveau d'un singe avec son supercalculateur Blue Gene/Q qui a émulé 530 milliards de neurones IBM vient de réaliser de nouvelles prouesses dans le domaine de l'intelligence artificielle. La division de recherche de la société a simulé avec succès 530 milliards de neurones dans un réseau basé sur le modèle CoCoMac (connectivité structurelle dans le cerveau d'un singe). Le système est basé sur le supercalculateur IBM Blue Gene/Q du laboratoire de recherche Livermore Lawrence. Ce système comprend 1 024 « compute nodes » par armoire et 17 noyaux de processus par « compute nodes », reposant sur l'architecture IBM TrueNorth Cognitive Computing. Le...

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• How do I get a Qualcomm Atheros Killer E2200 gigabit ethernet card working on a MSI Z87-GD65?

  - by Travis Allen

  So I literally just built my first computer from scratch and I can't get the network card to work as I've gathered it requires getting some drivers somehow.. Motherboard : MSI Z87-GD65 CPU : Intel Haswell i7 Ubuntu Ver : 12.04 Using the on-board network port Please help I'm about to start crying into my keyboard over this (not really). Any info would be greatly appreciated, also please be very specific as to what I have to do as I have not used Ubuntu very much so talk to me like a child, I won't take offence. Also I've already tried following the instructions here : How do I get a Qualcomm Atheros Killer E2200 gigabit ethernet card working? I don't know if I'm just retarded or am missing something

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• Order independent transparency in particle system

  - by Stepan Zastupov

  I'm writing a particle system and would like to find a trick to achieve proper alpha blending without sorting particles because: Each particle is a point sprite in a single mesh and I can't use scene graph ability to sort transparent nodes. The system node should be properly sorted, though. Particle position is computed on shader from initial velocity, acceleration and time. In order to sort the system I would have to perform all this computations on CPU, which is something I want to avoid. Sorting hundreds of particles against camera position and uploading it on GPU each frame seams to be quiet heavy operation. Alpha testing seems to be fast enough on GLES 2.0 and works fine for non-transparent but "masked" textures. Still, it's not enough for semi-transparent particles. How would you handle this?

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• Logic in Entity Components Systems

  - by aaron

  I'm making a game that uses an Entity/Component architecture basically a port of Artemis's framework to c++,the problem arises when I try to make a PlayerControllerComponent, my original idea was this. class PlayerControllerComponent: Component { public: virtual void update() = 0; }; class FpsPlayerControllerComponent: PlayerControllerComponent { public: void update() { //handle input } }; and have a system that updates PlayerControllerComponents, but I found out that the artemis framework does not look at sub-classes the way I thought it would. So all in all my question here is should I make the framework aware of subclasses or should I add a new Component like object that is used for logic.

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• When attempting to install ubuntu 12.04 from CD, I am stuck on black streen with "loading bootlogo..."

  - by Jessica K

  I downloaded Ubuntu 12.04 to my desktop and burned to a CD using Infra Recorder and instructions on ubuntu website. Restarted PC to boot from CD receive black screen with "Loading bootlogo..." then nothing happens and I have to restart with windows. The CD seems to be correct. Folders include .disk, boot, casper, dists, install, isolinux, pics, pool, preseed, autorun file, md5sum text file, readme.diskdefines file, wubi app. System Information Operating System: Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.120824-0336) System Manufacturer: TOSHIBA System Model: Satellite L305 BIOS: Default System BIOS Processor: Intel(R) Pentium(R) Dual CPU T2390 @ 1.86GHz (2 CPUs), ~1.9GHz Memory: 3062MB RAM Page File: 1553MB used, 4772MB available Windows Dir: C:\Windows DirectX Version: DirectX 11 DX Setup Parameters: Not found DxDiag Version: 7.00.6002.18107 32bit Unicode Drive: D: Model: PIONEER DVD-RW DVRKD08L ATA Device Driver: c:\windows\system32\drivers\cdrom.sys, 6.00.6002.18005 (English), 4/11/2009 00:39:17, 67072 bytes

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• Scrambled screen on 12.04 with Radeon HD 7670M/2GB when scrolling the page

  - by Mihkel

  I have Ubuntu 12.04 LTS 64 bit and I have installed proprietary drivers for my Radeon HD 7670M with 2GB memory. But if I scroll page or do anything like move a window then I get blurred screen (more like scrambled maybe) for a second and if I try to take PrtScr of it, it is goes to normal. I have tried other drivers and it does not solve my problem. And I do not want to go over 32 bit Ubuntu because I have 6 GB ram and I would lose so much of it. Also if it helps, my processor is Intel® Core™ i5-3210M CPU @ 2.50GHz × 4.

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• October 2012 Chicago IT Architects Group Meeting Recap

  - by Tim Murphy

  It seemed very ironic that the day we have a presentation on the architecture of building applications for Windows 8 the Surface tablet is opened for pre-order.  Tom Benton started the evening enlightening the attendees on the user experience for those who had not seen it yet.  He even passed around his table from last year’s Build conference for everyone to play with.  This was followed with a tour of the capabilities and structures that make up a Windows Store App on Windows 8.  Taking it to its conclusion, he rounded out the discussion by covering the certification and deployment process. As usual it was great to see a lot of familiar faces last night.  We are always looking for more people to join in our discussions.  Stay tuned here for announcements up upcoming meetings and topics.  Also, if you have a topic you would like to present or see presented feel free to contact me through this blog. del.icio.us Tags: Chicago Information Technology Architects Group,CITAG,Winodws 8,Windows Store,Tom Benton

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• Level and Player objects - which should contain which?

  - by Thane Brimhall

  I've been working on a several simple games, and I've always come to a decision point where I have to choose whether to have the Level object as an attribute of the Player class or the Player as an attribute of the Level class. I can see arguments for both: The Level should contain the player because it also contains every other entity. In fact it just makes sense this way: "John is in the room." It makes it a bit more difficult to move the player to a new level, however, because then each level has to pass its player object to an upcoming level. On the other hand, it makes programming sense to me to leave the player as the top-level object that is persistent between levels, and the environment changes because the player decides to change his level and location. It becomes very easy to change levels, because all I have to do is replace the level variable on the player. What's the most common practice here? Or better yet, is there a "right" way to architecture this relationship?

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• Calling all developers building ASP.NET applications

  - by Laila Lotfi

  We know that developers building desktop apps have to contend with memory management issues, and we’d like to learn more about the memory challenges ASP.NET developers are facing. To be more specific, we’re carrying out some exploratory research leading into the next phase of development on ANTS Memory Profiler, and our development team would love to speak to developers building ASP.NET applications. You don’t need to have ever used ANTS profiler – this will be a more general conversation about: - your current site architecture, and how you manage the memory requirements of your applications on your back-end servers and web services. - how you currently diagnose memory leaks and where you do this (production server, or during testing phase, or if you normally manage to get them all during the local development). - what specific memory problems you’ve experienced – if any. Of course, we’ll compensate you for your time with a $50 Amazon voucher (or equivalent in other currencies), and our development team’s undying gratitude. If you’d like to participate, please just drop me a line on [email protected].

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• Writing to a structured buffer with a compute shader (D3D11)

  - by Vertexwahn

  I have some problems writing to a structured buffer. First I create a structured buffer that is filled with float values beginning from 0 to 99. Afterwards a copy the structured buffer to a CPU accessible buffer is made to print the content of the structured buffer to the console. The output is as expected (Numbers 0 to 99 appear on the console). Afterwards I use a compute shader that should change the contents of the structured buffer: RWStructuredBuffer<float> Result : register( u0 ); [numthreads(1, 1, 1)] void CS_main( uint3 GroupId : SV_GroupID ) { Result[GroupId.x] = GroupId.x * 10; } But the compute shader does not change the contents of the structured buffer. The source code can be found here (main.cpp): https://bitbucket.org/Vertexwahn/cmakedemos/src/4abb067afd5781b87a553c4c720956668adca22a/D3D11ComputeShader/src/main.cpp?at=default FillCS.hlsl: https://bitbucket.org/Vertexwahn/cmakedemos/src/4abb067afd5781b87a553c4c720956668adca22a/D3D11ComputeShader/src/FillCS.hlsl?at=default

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• How can I upgrade to Lubuntu 14.04.1 withot a PAE kernel?

  - by Richard

  On my Dell Latitude D800 laptop, which has an old Pentium M without PAE support, I was able to successfully install Lubuntu 14.04 from the CD. When I try to upgrade, I get the error: PAE not enabled Your system uses a CPU that does not have PAE enabled. Ubuntu only supports non-PAE systems up to Ubuntu 12.04. To upgrade to a later version of Ubuntu, you must enable PAE (if this is possible) see: http://help.ubuntu.com/community/EnablingPAE I have seen the Communit Wiki page for PAE. The suggestion is to add forcepae to the command line options. When I do this, I get the same message. Moreover, dmesg does not indicate PAE was ever enabled. Is there anything else I can ry to get Lubuntu to upgrade correctly?

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• Investigate disk writes further to find out which process writes to my SSD

  - by zuba

  I try to minimize disk writes to my new SSD system drive. I'm stuck with iostat output: ~ > iostat -d 10 /dev/sdb Linux 2.6.32-44-generic (Pluto) 13.11.2012 _i686_ (2 CPU) Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sdb 8,60 212,67 119,45 21010156 11800488 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sdb 3,00 0,00 40,00 0 400 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sdb 1,70 0,00 18,40 0 184 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sdb 1,20 0,00 28,80 0 288 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sdb 2,20 0,00 32,80 0 328 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sdb 1,20 0,00 23,20 0 232 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sdb 3,40 19,20 42,40 192 424 As I see there are writes to sdb. How can I resolve which process writes? I know about iotop, but it doesn't show which filesystem is being accessed.

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• Why does Live-USB boot freeze at the moving dots?

  - by Caleb

  I am currently trying to boot into Ubuntu 12.04 x86 using a USB. I used Untetbootin to do all that boot crap and what not. But for some reason Ubuntu wont load pass that screen with the dots and the purple background. What happens is the dots all light up once, then they go back to white then they all light up at the same time and then it just gets stuck there. Ive even tried using an x64 copy (since my CPU supports it) but have no luck with that either. Ive even tried different DISTRIBUTIONS of Linux and all have failed with loading. Please help

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• Keep getting messages about internal system errors

  - by Tomas Lycken

  I keep getting popups about internal system errors (see screenshot below) on irregular intervals (several times a day), that I don't know what to do about. If I continue through the dialog and try to report the error back to the Ubuntu project, I get a message stating that development on this version of Ubuntu has been completed, and that I should ask for help here if I don't know what to do about it. I don't. If I show the details of the error message, the "executable path" parameter shows /usr/share/apport/apport-gpu-error-intel.py. Is this a bug I should report to Launchpad, or just a configuration error somewhere? If it's a bug, how do I collect the data I (and the devs) need? Update in response to comment: I am running an ASUS N53SN, sporting an Intel Core i7 2630QM CPU and an NVidia GeForce 550M GPU.

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• AngularJS: structuring a web application with multiple ng-apps

  - by mg1075

  The blogosphere has a number of articles on the topic of AngularJS app structuring guidelines such as these (and others): http://www.johnpapa.net/angular-app-structuring-guidelines/ http://codingsmackdown.tv/blog/2013/04/19/angularjs-modules-for-great-justice/ http://danorlando.com/angularjs-architecture-understanding-modules/ http://henriquat.re/modularizing-angularjs/modularizing-angular-applications/modularizing-angular-applications.html However, one scenario I have yet to come across for guidelines and best practices is the case where you have a large web application containing multiple "mini-spa" apps, and the mini-spa apps all share a certain amount of code. I am not referring to the case of trying to have multiple ng-app declarations on the same page; rather, I mean different sections of a large site that have their own, unique ng-app declaration. As Scott Allen writes in his OdeToCode blog: One scenario I haven't found addressed very well is the scenario where multiple apps exist in the same greater web application and require some shared code on the client. Are there any recommended approaches to take, pitfalls to avoid, or good sample structures of this scenario that you can point to?

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