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• How do I balance program CPU reverse compatibility whist still being able to use cutting edge features?

  - by TheLQ

  As I learn more about C and C++ I'm starting to wonder: How can a compiler use newer features of processors without limiting it just to people with, for example, Intel Core i7's? Think about it: new processors come out every year with lots of new technologies. However you can't just only target them since a significant portion of the market will not upgrade to the latest and greatest processors for a long time. I'm more or less wondering how this is handled in general by C and C++ devs and compilers. Do compilers make code similar to if SSE is supported, do this using it, else do that using the slower way or do developers have to implement their algorithm twice, or what? More or less how do you release software that takes advantage of newer processor technologies while still keeping a low common denominator?

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• Choppy window movement in Gnome 3.4 on Ubuntu 12.04

  - by mjrussell

  I have been using Gnome 3.2 since Ubuntu 11.10 was released and it has always been perfectly smooth and performed extremely well, much better than Unity. After doing a clean installation of Ubuntu 12.04, Gnome 3.4 performs less well. If just one window of a relatively simple application, such as Gnome Terminal, is opened and moved around, the movement is sometimes very choppy, but the rest of the time it's perfectly smooth. The times when it's choppy seem to be when part of the window goes off the bottom or right side of the screen. Also, if there are multiple windows open, it is almost always choppy. These facts suggest to me that it's something to do with the compositor. Unity works perfectly smoothly. Memory usage is only at about 500-600MB, out of 3GB, even with a few things open. The graphics card is the on-board Intel graphics on the Core i5 M450. Does anyone have any ideas what might be causing this problem? Thanks

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• How to solve dual monitor issue, which happens only during X start?

  - by tamashumi

  When is loading and two monitors are connected, instead of a login screen I see this: ...after clicking OK, selection appears: Then I'm following to console login, disconnecting by hand the secondary monitor cable, restart lightdm with a command sudo service lightdm restart ...and voila! System loads fine. If I disconnect the cable before boot X will be loaded fine too. It's not a nice 'feature' when I have to disconnect the cable each boot or X restart. I was trying to delete monitors.xml but it didn't help. The situation relates to my notebook with Intel integrated GPU. The same happens on two different pairs of monitors: at the office and at home. How can I fix this? Ubuntu 12.04 x64 Desktop with default Unity GUI.

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• Partitions and cdrom are not mounted, and the bars are missing in Ubuntu 12.04

  - by nuit

  Provide my spec and sorry for my poor English first. MB: Gigabyte G31M-S2L (bios ver. F9) CPU: intel E5200 2G RAM HD1: WD 160G with 2 partitions (partition 1:60G, NTFS, win xp; partition 2:100G, NTFS) HD2: WD 320G with 2 partitions (partition 3:220G, NTFS; partition 4:100G, ext4, Ubuntu) Recently, I tried to install Ubuntu 12.04 Beta 2 on my desktop PC (on partition 4). At the beginning, everything looked great including the auto-mounting of partitions 1~3 and the unity (3D). However, after I deleted and re-allocated the partitions on HD2 and re-installed Ubuntu on partition 4, the partitions 1~3 are no longer auto-mounted when I logged in the desktop (and even the inserted cdrom would not be mounted either), and the launch bar and menu bar in unity (3D) are missing. The configurations during these two installations are all the same as default. Are there any possible reasons or solutions for this issue? Thank you in advance!

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• google earth 7, 32bit in 12.10 runs without error but there is no image (globe)

  - by Dennis

  Everything seemed to install fine. I can start google earth and all layers are available, I can even zoom in and look at 3-D buildings. But there is absolutely no image data displayed at all. If you look at the whole globe the outlines are there on an invisible globe. As you zoom in the base looks dark grey almost black but there is no image. I have tried. Tools Options Graphics Safe Mode Tools Options Texture colors all combinations Tools Options Cache (tried several changes to the numbers) lspci shows Display controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03) Running on a Dell Inspiron 6000 laptop (1.5Gb memory)

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• Can't install lib32ncurses5-dev or ia32-libs

  - by tito_drum

  I'm trying to install Android source and I keep getting this error. I kept with the installation but seems these packages are sort of required to have a complete and successful installation. this is my error Package lib32ncurses5-dev is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source Package ia32-libs is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'lib32ncurses5-dev' has no installation candidate E: Package 'ia32-libs' has no installation candidate E: Unable to locate package lib32readline5-dev E: Unable to locate package lib32z-dev I have a VM with Ubuntu on Intel® Core™ i5-2300 CPU @ 2.80GHz and 32-bit system

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• Inspiron 5720 unclaimed hardware

  - by Chelios

  I have two unclaimed devices in my Dell Inspiron 5720: *-display UNCLAIMED description: 3D controller product: NVIDIA Corporation vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress cap_list configuration: latency=0 resources: memory:f0000000-f0ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:3000(size=128) *-serial UNCLAIMED description: SMBus product: 7 Series/C210 Series Chipset Family SMBus Controller vendor: Intel Corporation physical id: 1f.3 bus info: pci@0000:00:1f.3 version: 04 width: 64 bits clock: 33MHz configuration: latency=0 resources: memory:f1614000-f16140ff ioport:efa0(size=32) What are these devices and what drivers do I need for them? Thanks!

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• PAE on Ubuntu 12.04

  - by JamesStewy

  I am having trouble using PAE on Ubuntu 12.04 LTS 32bit. I recently upgraded from 4 to 8gb of RAM but PAE doesn't appear to have picked this up. When I run "grep --color=always -i PAE /proc/cpuinfo" I get pae in the list. When I run "dmidecode | grep Size | grep MB" Installed Size is 3825 but the Maximum Total Memory Size: 8192 MB. When I check the BIOS it says there is 8192 MB available and the computer fully supports I have followed everything I can find on the internet (including this https://help.ubuntu.com/community/EnablingPAE) and nothing is working. My Computer is a Toshiba Portege m750. It has an Intel Centrino Core 2 Duo processor. Bought in 2009 Thanks, JamesStewy

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• Graphics problem after updating to Kernel 3.11 with Ubuntu 13.04 64bit

  - by Gaurav Sharma

  I am new to ubuntu.I have a 64 bit intel processor with ATI 6570 graphics card. Now Ubuntu 13.04 is working fine with stock kernel(3.8). But as I read somewhere that kernel 3.11 do support ATI graphics card better, I tired updating them with no success. I tried 3.11.6 3.11.4 3.11.0 but with all of them I am facing the same problem ... after installing them and restart, the screen resolution get distorted and the unity becomes too slow transparency in dash and the launcher is also lost. Now whatever little I know , this may be related with graphics diver either they are not present or the graphic card is not turned on. Can some one help with this. And yeah i tried ubuntu 13.10 that worked fine but it has some bugs. and yeah please pardon me for my bad English.

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• Cant install ubuntu 12.10?

  - by harsh

  I believe i have tried every trick in the book but Ubuntu just wont install. Windows has no issue with it. I burned a DVD of Ubuntu 12.10 and it has passed all checks, but i keep getting different errors while installing. Mainly while "Creating the Partition in dev" and some times during "Copying files". The errors are: Errno 30, Errno 33, Installer crashed, failed to create partition etc... I have Intel core 2 duo 2.66Ghz, 4gb ram and ASrock motherboard. I really want to install Ubuntu 12.10 and 12.10 only! Also Should i prefer 32bit or 64bit? I have burned a 32bit version. Thank you

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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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• Lenovo z470 getting hot, after 12.04 install

  - by Rodrigo

  When I was using Windows 7 my notebook temperature was very good, it stayed very cool. After I installed 12.04, my notebook base is hot all the time, I cannot even put my hands on it for a long time. My notebook has a 2nd generation Intel i5 processor. I installed Jupiter and it shows 72 Degrees Celsius constantly. Anyone got a fix for this? I don't want to go back to windows but if I do not find any solution I will have to do it. I'd be very grateful for any help.

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• CPU temperature is high on Ubuntu

  - by Kaspar

  So I have a machine which has both latest *Ubuntu and Windows 8 on it. On windows 8 my CPU temp is roughtly 26 degrees when idle. Now when I boot into Ubuntu, CPU temperature is suddenly 43 degrees when idle, plus my fans are making a lot of noise which is probably because of the CPU degrees. Why is that? Everywhere I read it says the Linux is much better at managing CPU and so on. But yet it seems something is wrong. It is a stock installation of Ubuntu 14.04 and my CPU is a Intel i5-4570

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• Ouverture officielle du forum d'entraide sur la programmation des systèmes embarqués

  Nous avons le plaisir de vous annoncer la création du forum programmation système embarqué. Le but de ce forum est de regrouper les sujets liés à l'embarqué et aux problématiques bas niveau. Il s'agit donc globalement de la frontière logiciel / matériel pour laquelle il est bien souvent difficile de savoir où poser sa question sur DVP. Voici donc une liste non exhaustive de sujets que nous pouvons traiter : Développement sur microcontrôleurs (PIC, ATMEL, Arduino, ...) (MPLAB - AVR-GCC / AVR Dude) Développement sur processeurs ARM, Intel, MIPS, Power PC, ... Développement sur DSP Développement sur FPGA / VHDL Utilisation de cartes de développement ARM (Beagle Board, Fox Board, Panda Board, ...) Développement Linux e...

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• ATI graphics card, with gnome shell, screen flickers

  - by bioShark

  After installing gnome shell, without any problem, after log in the fonts are missing and it looks like crap...nothing is readable. Don't want to make it a double post, because my issue is similar to the one from this question but for me the problems have not been solved properly. After running the commands from that post, and installing the latest AMD 11.10 driver, the Gnome shell display issues have been solved. But each time I move the mouse in the upper left corner, to bring up the applications...my entire screen flickers. Without the applications been displayed, everything looks fine. Hardware: ATI HD4870, Intel Q6600.

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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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• how to install/compile CORSIKA/FLUKA for Ubuntu x32 12.04?

  - by Pantea Davoudifar

  I want to use some programs (CORSIKA/FLUKA) which are essentially designed for 32 bit systems. so I installed Ubuntu 12.04 32 bit on my system (Intel® Core™ i7-2700K CPU @ 3.50GHz × 8). Before this I had installed Ubuntu 9.10 (32-bit) on an older system and installed g77 from hardy repositories, compiled those programs without any problem. But this time when changing the repositories, g77 could not be installed even i removed all the things that i thought make this installation impossible, for example I need gcc-3.4 and removed all newer versions and tried to install them from hardy repositories. but the problem is that, whenever I have g77, corsika does not compile, and whenever I remove it, fluka does not compile, and also i received a error messages like this: crt1.o not found in /usr/bin/lb. In fact these .o files does not exist on my system user/bin/lb I have no directory lb there? I do not know how to link it? Or do i need to reinstall everything?

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• How can I install Ubuntu (SO many problems)

  - by Dragos

  I have a question, my friend tried installing Ubuntu on my notebook (Asus g75v) and nothing tried, at one point he went past the installation screen and every he used the mouse the screen flickered and the driver crashed (I assume) and it would go back a step, I heard that there is way to install ubuntu without any graphics, maybe that will help me with the screen flickering (I have a gtx 670m), so we tried WUBI installer, I tried installing with that and it gave me a Wubildr.mbr missing error, so I gave that up after several times, although I do notice that I have an intel driver, and I keep downloading AMD versions, does that effect anything? I'm having trouble installing Ubuntu and I wish to be able to run it on my laptop, I want to learn this OS and I cannot even install it, I am a bit concerned, if anyone can back at me with any answer at all, please don't hesitate to post, just please don't post if you don't know what's going on, thanks for listening! ~cheers -Dragos

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• How do i fix the slow scroll in browsers and high XOrg cpu usage

  - by Virgil

  I am facing an issue while scrolling in browsers(firefox, chrome, and opera) , scroll is jagged and slow. Also when scrolling the cpu usage spikes. I am currently running ubuntu natty(beta 1), switched from ubuntu 10.10 where the problem was worse. I am using the nvidia beta driver, which ubuntu installed automatically. My graphic card is nvidia Quadro NVS 150M. I tried running ubuntu without the effects on , but when using multiple applications at the same time xorg usage spikes again. Additional info: 2GB of RAM and an intel core 2 duo processor. Any help would be greatly appreciated. Thanks in advance!

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• Play videos with libwebkit in Ubuntu 11.10 server

  - by Luis Fagundes

  I'm using libwebkit (with python-webkit) to render a page that plays a video. This application works fine in a Ubuntu 11.04 Desktop, Nvidia card and lots of libraries and software installed, but in a fresh Ubuntu 11.10 Server with intel 82945G/GZ card the video does not play. I guess either some codec package is missing or it's a driver problem. What could be missing for this to play? I'm trying with this video: http://video.eustasy.co.uk/480/ EDIT: doesn't look like a driver problem. With chromium I can play the video, but with libwebkit + python-webkit the video just shows the first frame and doesn't play. Any hints on what package could be missing? SOLVED: apparently it had to do with lack of audio. While chrome would play the video with no sound, libwebkit wouldn't start video. Adding user to audio and video groups solved the problem.

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• Ubuntu 12.10 Help! Everything is incredibly slow

  - by Keith

  I installed 12.10 from usb onto this machine. Intel celeron 2.00 GHz 496MB RAM I had to modify GNU-Grub to read "nomodeset" or i could not see the GUI. I have an Nvidia graphics card. Takes about 2 minutes to boot. The icons on the left of desktop take about 1 min to slowly open their menu. Have a network connection but mozilla is 404 and i cannot update. Where can i find a blow by blow explanation for troubleshooting and repairing this problem?

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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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• Trying to run 32bit windows game in wine on 64bit 12.04

  - by georgelappies

  I am trying to run Icewind dale2 from GOG.com in wine on ubuntu 12.04 64bit. I am using the AMD ATI binary blob display driver. Running the file command on /usr/lib32/fglrx/libGL.so.1.2 gives: george@devbox:/usr/lib32/fglrx$ file libGL.so.1.2 libGL.so.1.2: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, stripped george@devbox:/usr/lib32/fglrx$ So I definetly have 32bit opengl. I am using latest Playonlinux and tried this on wine 1.4 and 1.5... How can I force wine to use my opengl library?

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• Installing linux on OCZ RevoDrive3 x2

  - by user2101712

  First of all, here is the configuration of my computer: Motherboard: Asus H87Plus RAM: Corsair Vengeance 32GB Processor: Intel i7 4770 Drive: OCZ RevoDrive 3 x2 (240 GB) (OCZ Revodrive3 is a PCIe module) I am trying to install the latest version of Ubuntu Desktop (13.10). The problem is that in the UEFI (bios) the drive shows up as a 240 GB drive, but in the Ubuntu installer it shows up as two 120 GB drives. If I install Ubuntu in any of these two drives, it never boots. The screen flickers a few times and comes back to the UEFI menu. I have tried reading up and have come across information that the drive has a "fakeraid", and the solution is to use dmraid. However, when I give the following commands in the terminal (from live CD): # modprobe dm_mod # dmraid -ay it says: no raid disks. And the following command: # ls -la /dev/mapper/ just shows /dev/mapper/control How can I install Ubuntu on my computer? what is the correct method?

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• Choppy video in Pitivi

  - by pedroo

  I am trying to edit 720p mov video footage in Pitivi, and when I place 1 clip in the timeline it plays fine in realtime. The problem begins when I add another clip and try to edit. Besides the 1st clip (that continues to run in realtime), all the other clips or cuts are choppy. I currently have 3gigs of ram and an Intel duo core processor. And using 10.10. Is there something I can try? I've heard of Kdenlive, is it better that Pitivi in handling 720p footage? Thank you very much!

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