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• What is the ideal laptop for creative coding applications?

  - by Jason

  Hi, I am a creative coder using C++(cinder and OpenFrameworks) I am looking to upgrade from my MacBook, which slowed down to about 3fps this morning. My project involves particles systems and fluids reacting to audio analysis data and computer vision data in real-time. SD or HD? no biggie. I have asked many people what computer I need. Ideally, I want a MacBook Pro. But is that enough power? I've been told that I need a desktop for what I am doing though I'd rather stay portable I've been told that I should go PC linux to get the most power but I'd rather stay mac I've been told that RAM is more of bottleneck than processor speed I've been told that the Graphics Card is more important than CPU and that code optimizations such as using trees over lists, proper threading, sending tasks to the GPU make a bigger difference than the hardware!!! what's true?! what do I need? Any suggestions are greatly appreciated

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• What makes an application memory bandwidth bound?

  - by TheLQ

  This has been something that's been bothering me for a while: What makes an application memory bandwidth bound? For example, take this monstrosity of a computer that calculated the 5 trillionth digit of pi (and later 10 trillionth digit). I was surprised that they choose the lower but faster 98 GB RAM at 1066 MHz instead of the larger but slower 144 GB at 800 MHz. This is especially surprising considering they are using 22 TB HD array to store the results from computation; more RAM means less need for hard drives. Maybe its because I don't write applications for HPC servers, but how would RAM be the bottleneck? Are there any other non-HPC applications that usually run into this problem?

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• problems with graphic performance in Ubuntu 12.04

  - by Falk

  in advance: my English is not perfect ;) processor: Intel® Core™2 Duo CPU E8500 @ 3.16GHz × 2 memory: 3,9 GiB graphics: GeForce GTX 460 Ubuntu 12.04 32-Bit fresh installed (previously 11.10 32-Bit) driver: NVIDIAs accelerated Driver (Version current-updates) probelm: In Ubuntu 12.04 I have problems with the performance of the graphics (games for example: Volley Brwawl, Neverball, Beep and Minecraft), and effects of windows (always at minimize, maximize...) There are laggs at animations, and the laggs in games are extremely annoying. Problems occur only in Ubuntu 12.04, everything was good in 11.10. No Problems with YouTube videos, HD videos. Is there a solution? BBecause I have found nothing here in the Forum and on Google. Or is an update coming soonfor driver or whatever? (This Bug is already registered in Launchpad.) Thank you!

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• Unable to start GRUB2 on Triple boot Macbook Pro with OS X Lion, Windows 7 and Ubuntu

  - by Shravan

  I installed Windows 7 using Bootcamp. Then I created a partition from the empty space in the Windows partition and another 4GB partition for the linux swap using GParted. I installed Ubuntu 12.04 LTS in the the newly created partition from the Windows partition. Now GRUB2 does not load and I can only see the blinking cursor on the top right when selecting "Windows HD" from the 'option' key at the start up. OS X works fine but nothing else. Could someone please help me fix this? I am attaching the boot-info from the boot-repair tool. http://paste.ubuntu.com/1040169/

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• Boot splash broken by "SP5100 TCO timer: mmio address 0xyyyyyyy already in use"

  - by mogliii

  I have ubuntu 11.04 with all the latest updates. I have an ATI HD 4350 graphics card and the "ATI/AMD proprietary FGLRX graphics driver" activated. The reported behaviour does not affect the functionality, its just an optical thing. When I booted up using the desktop CD, the ubuntu boot splash was shown correctly in high resolution. Now after installation with FGLRX the dipsplay is broken (see picture). http://img824.imageshack.us/img824/7269/tcotimer.jpg This is what can be found in dmesg [ 8.621803] SP5100 TCO timer: SP5100 TCO WatchDog Timer Driver v0.01 [ 8.621967] SP5100 TCO timer: mmio address 0xfec000f0 already in use [ 8.622650] fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY' taints kernel. [ 8.622656] Disabling lock debugging due to kernel taint This is what MMIO means: https://en.wikipedia.org/wiki/Memory-mapped_I/O Any idea how to get back the high-res splash?

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• AMD control center doesn't save preferences

  - by Fault

  Everytime when I edit the monitor preferences in AMD to multi-monitor or to a multidesktop, when I press save or apply the program just closes with no errors and the preferences hasn't been saved. If I try to do it via the Displays app that is built-in in ubuntu 11.10 I get the following error: The selected configuration for displays could not be applied required virtual size does not fit available size: requested=(2560, 1024), minimum=(320, 200), maximum=(1280, 1280) I don't know if it helps but my graphics card is a ATI Radeon HD 4800 and my monitors are both 1280x1024. I'm running the proprietary driver without post-release updates because I always get an error trying to install that one.

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• Ubuntu Wubi Booting Problem

  - by D3s7

  i have a problem with my Ubuntu 12.04 Wubi installation, sometimes when booting, the computer will get to the purple screen without the Ubuntu logo, then will go to a black screen and then lots of white saccaged colors will appear and i will be taken to the login page. But sometimes, it just get stuck on the black screen and does nothing and i have to hard shutdown and retry it until it works. What may cause this problem and why? I can shutdown correctly. Thanks for helping. Edit: RADEON HD 7650M Graphic card with latest available Drivers on amd's driver download site (fglrx drivers caused shutdown problems so i removed them). Screen resolution is 1600x900.

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• Will Apple abandon OpenCL?

  - by John

  I am developing OpenCL applications, amongst others for MacOS. The new Macbook pro 13 inch comes with an Intel HD Graphics 3000 card so it seams reasonable to assume all their mainstream computers like Macbook and Mac mini will also come out with this Intel graphics card soon. OpenCL is not available for Intel graphics cards. Intel having a terrible reputation in developing graphics drivers and Apple knowing this makes me wonder Apple is abandoning OpenCL already again. Especially considering OpenCL should run anywhere, not only on high end systems. Developing applications only for the high end Macs with dedicated graphics hardware or for previous generation hardware with the Geforce 320M would not be a feasible option for me. Does anybody have any thoughts on this?

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• Adjust brightness and contrast?

  - by Anon58

  I have an acer aspire as5750. With the intel hd 3000 graphics. When i use the adjustment function keys the dial moves but it doesn't translate to the screen diming. Same with the dial in linux settings. Also in colour settings it seems there is no colour file or icc profile available for this laptop. Do you think if i can get a working icc profile then it will fix this or not? I have found something that could work:Argyll but it looks complicated to use, has anyone here used it? Would it allow me to dim? Or is there any other work around? I have searched lots but can't find a solution.

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• System crashes when internet connection is unplugged

  - by Rincewind

  When i first tried to install any ubuntu newer than 10.04 on my netbook (Acer aspire one 722 11,6" WXGA - C-60 Dual Core APU - AMD Radeon HD 6250 - 1x HDMI - 2GB DDR3 - 320GB - 802.11bgN - 6CELL2.2 - BT 3.0 - VGA Webcam), it would fail to boot. I found out that the only fix to this was linking it to the internet via lan-cable during the installation. However, after installing ubuntu 12.04 successfully my system is crashing everytime i unplug the lan-cable. My first thought was disabling the netbook´s w-lan (via the band at the top) but it was not fixing the problem. Looking on the taskmanager ('top') during the process brought no further insight, no process was exploding or something like that. As i am out of guesses help would be really appreaciated. Lg Rincewind

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• Newly installed 12.04 on Radeon or NVIDIA type of gfx card?

  - by Falk

  I use a Nvidia Quadro NVS 290/PCIe/SSE2 at work with dual monitor setup. Since 11.10 things has gone downwards with performance. But now with 12.04 performance is even worse, and I can agree that the 290 is old and puny. So when I look what low profile cards I can get to my computer today, the choice it Radeon HD 6570 or NVIDIA Quadro 600. I have always used Nvidia on linux beq I think that historically their drivers worked better. But which one do you recommend today on 12.04 and Unity3d? -- Regards Falk

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• Has anyone got "Creative Soundblaster X-Fi Surround 5.1 Pro" - (usb Interface) installed?

  - by Vivek Sharma

  Has anyone tried this external usb sound blaster on ubuntu. http://us.store.creative.com/Sound-Blaster-XFi-Surround-5.1-Pro/M/B0044DEDCA.htm. I have bought M-Audio Bx5a deluxe Studio Monitors for my T61. I think the onboard Intel HD sound card will not do any justice to these speakers. So I am looking for an external sound interface. I particularly liked this one as it is not very expensive and it has a volume control (speaker lack a central-front volume knob). Has anyone been able to use this on ubuntu. Also, if anyone would like to recommend me another option?

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• Failure to start grub with Wubi

  - by Marco Ceppi

  My laptop battery ran down and died while using Ubuntu 10.04 with Wubi. Upon recharge (and restart) selecting Ubuntu from the Windows Boot menu brings me to the typical prompt which says (and I paraphrase): Trying hd(0,0) on Disk... After that the screen flickers to white (for a split second) then black. No grub menu comes up (as I would expect) no cursor, no grub sh prompt. Nothing. I've tried switching TTYs to no avail. As there are no logs, I can't trouble shoot anything. I've run a check disk from windows (on the NTFS partition the root.disk is stored) with no luck. What is causing this failure to load grub (and, by association Ubuntu) - How can I restore my setup and get Ubuntu via Wubi working?

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• Internal HDs that don't contain the OS aren't accessable unless I try to manually browse them

  - by Hrafn

  So I have 4 internal hard drives, one that contains the OS (Ubuntu 12.04), all ext4. After starting the computer up, and without having tried to access the drives (File manager, terminal etc) it seems like the drives haven't been mounted. If I go into the "Disks" utility I see that the disks haven't been mounted. Programs that try to access the HD's during startup throw an error. For example my music player can't find the library, my note taking software can't find the database etc. But after opening the drive in a file manager everything works. I've checked SMART on all the disks and everything is a ok. Any and all ideas would be appreciated.

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• assistance recovering/reinstalling/installing ubuntu and win7

  - by razzrat

  New computer with Windows 7 installed, I defrag, shrink, re-boot from Ubuntu LiveUSB, go to gparted and look at partitions before installing Ubuntu....for some reason Win7 is still taking up 400G of my HD! I resized partition down with gparted, exit and yes of course I can't boot into Windows. When I go to install Ubuntu in new large unallocated space I get a blank screen at the point you are asked what kind of installation you want. I have Ubuntu 12.04 LiveUSB, Windows 7 re-installation disk and driver disks also. The HDD currently has 3 allocated partitions: 'diag' fat16, 'recovery' ntfs and 'OS' ntfs which has a red '!' next to it.

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• Can't start ubuntu 11.10, Stops at login screen!

  - by Martinpizza

  I have been trying to dual boot ubuntu with windows 7 via WUBI on my custom built pc but without success. When i start the computer i can choose windows or ubuntu i choose ubuntu and when i should get to the login screen the screen just stays purple/pink. Tried safe mode but cant get in there either. I have tried reinstall but did not work either. :( The second time i install ubuntu the screen was purple/pink and the screen was cut of so the left side was on the right side and right side on left side (hard to describe) Third time installing (The last time) it is just like the first time please help!!!! cant get nowhere without help i am kinda new at ubuntu and its creepy commands. Had ubuntu on my old computer. I think the problem is my hardware so here is my computer specs: Amd Fx 6100 Amd HIS Radeon HD 6950 ICEQ X Asus Sabertooth 990fx 1TB Harddrive I have no idea the name on it Please Help me!! Sorry for my bad English! :D

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• ubuntu 12.10 graphic does not works correctly

  - by Amin

  I have installed Ubuntu 12.10 but my graphic does not works correctly. I used this command to installation: sudo apt-get install fglrx fglrx-amdcccle fglrx-dev But after the restarting my system, the side panel and upper one does not appear any more! I guessed it maybe that I used some incompatible packages so I removed the graphic card driver by this command: sudo apt-get purge fglrx fglrx-amdcccle fglrx-dev and tried it from graphical way from system setting > Software Sources > Aditional drivers and choosed the second option then applied change. But the resault waas such as before way!! I belive it is because of the Ubuntu does not know my graphic card. I am using VAIO VPCEA2TGX (N/A) and my graphic cart version is Mobility Radeon HD 5400 Series if it is matter. So now what is the exact problem and what I have to solve this?

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• How to calibrate Toshiba LED screen - the colours are over saturated

  - by user94369

  I have purchased a new Toshiba Satellite C850-A812 laptop, with ATI Radeon HD 75xx series. When i first installed Ubuntu 12.04.1, the open source driver worked like a charm with the colors, i mean the colors were so vivid. However after installing the ATI proprietary driver from the repos, the colors went too "whity" and too bright. I even installed the updated driver, and went further to download the latest driver from ATI and install it in vain. I tried to use the ubuntu build in calibration tool, but it keeps on asking me to enter the ICC profile before i proceed to calibrate. I played with the catalyst control center, tried everything possible, but still the colors are still wayyyyyyyyy over exposed. Please advice :)

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• after upgrade from 10.04 to 10.10, no keyboard, cannot login

  - by avar

  Hello, just did upgrade from kubuntu 10.04 to 10.10.. after all done and reboot, when the login box shows up, my keyboard and laptop pad ( mouse ) dosn't work, (plugged in the usb mouse, it works sometimes) but never keyboard. i went to recovery , the boot hung up when it says : [ 17.704053] EXT4-fs (sda9): mounted filesystem with ordered data mode Begin: Running /scripts/local-bottom ... Done. Done. Begin: Running /scripts/init-bottom ... Done. stuck here. nothing works except ctrl+alt+del i tried booting from livecd and update-grub, also tried booting manually from grub command line, everytime it stuck at lines above .. so it's not grub problem . how to solve this ? if it is important, i have ATI mobility radeon HD 5470 card .

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• Ubuntu hanging problem

  - by JMearsXS

  I have a problem with ubuntu 12.04 LTS on my custom tower pc in which the OS hangs at specific points:- - live usb with persistence: hangs when mouse appears. - installed to hard disk: hangs after login, logon sound never plays. i am a relative newbie with linux so any terminal output would not make sense to me :) the pc specs are as follows: - MSI MS-7301 Cuba motherboard - 3GB DDR2 RAM (NOT dual channel) - ATI Radeon HD 5450 gfx card the live usb works fine on all other PC's i tried it on. could any one help me ?

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• Graphics problems: noise-like glitch, and screen freezes in Ubuntu 13.04

  - by user207253

  I have recently upgraded to 13.04 and am using unity. I am experiencing two intermittent problems with the graphics: 1) All or part of the screen is taken up by 'noise', which lasts for about a second, see screenshot: 2) The launcher panel freezes. I can still move the mouse and the keyboard responds to function keys (I can dim the screen), but I cannot select anything. At the moment I recover by ctr-alt-f1, and restarting lightdm. My computer is a Samsung Chronos 7 laptop, model NP700Z5C, with Intel HD 4000 graphics The same problems occur with lightdm and gdm. I have attempted to install the intel drivers (as the screenshot hints) but these are not indicated as additional drivers in software & updates so I'm not sure whether they are in use. Any suggestions?

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• Failed to install the proprietary display driver, Compiz crashed!

  - by Naveen

  ATI Mobility Radeon HD 5400 I was using the default open source driver with Gnome classic, but when I upgraded to the closed sourced one using jockey-gtk/additional drivers everything messed up! It failed to activate the driver. Here is the error log. Wobbly windows or any other compiz effect won't work now. I can't even move a window! I'm on Precise Pangolin, Kernel-3.2.0-31-generic-pae Please Help! :( Update: I think my driver is installed even jockey doesn't show it. Compiz effects are working in Unity desktop... but I want it on Gnome Classic.

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• Shader Model 3.0 not available

  - by Romy

  I have Acer 4745G with ATI HD 5650 1GB VRAM. After I installed the COD Black Ops trough Wine Playonlinux and successfully installed, and I play the game and then appear message "Shader Model 3.0 not available". I have installed ATI driver 11.8 when I trying this game. And then I'm trying to install the driver from menu "System Administration Additional Driver, it doesn't work. I cannot log in, in the screen appear only the text for log in. And then I uninstall it trough recovery mode. And then I download ATI driver 11.11 from official ATI/AMD website, and then I restart my computer and my screen appearing only text again. I'm using Ubuntu (Ultimate Edition) 11.04. How to overcome this problem?

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• How to render Minecraft on the GPU?

  - by l0b0

  Hardware: Intel i7 AMD Radeon HD 6970 SSD with plenty of space 6 GB RAM Software OpenJDK 6, 7, and Oracle Java 7 (reproducible with all three) AMD Catalyst 12.8 and open source driver (reproducible with both) Ubuntu 12.04 x86_64 and older Minecraft 1.3.2 vanilla and older On this setup I am getting rubbish frame rates after a short while of playing, dropping from about 45-55 to 15 in a couple of minutes. CPU use is 40-45 even when rendering the opening screen at 1920x1280, and gameRenderer is using about 90% CPU when playing. Rather than trying to eke out a few more FPS out of an obviously broken rendering pipeline, I really hope to find a solution to make the GPU render Minecraft.

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• Upgrade two computers on the same WIFI network from 12.04 to 12.10

  - by deshmukh

  I have two computers on the same WIFI network at home. Both run on Ubuntu 12.04 and both will need to update to 12.10 shortly. There are some applications that are installed on one but not on the other and vice versa. But they share a large many applications. Please indicate how can I upgrade both in such a way that: I download all the packages required on Computer 1 Move the downloaded packages to the other computer using external HD (that is much quicker than over WIFI) Then upgrade Computer 1 Then upgrade Computer 2 -- after it downloads any packages that are not already available. Also, I am a newbie and would be grateful if the process is simple and properly explained.

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