Based on the description of the symptoms, it sort of sounds like this might be caused by an incorrect AGPMode setting, which is relevant when DRI is enabled. You should test if changing this makes the issue go away. In your /etc/X11/xorg.conf set AGPMode to various values like this:
Section "Device" ... Option "AGPMode" "2" EndSection Possible values include 1, 2, 4, 8. You can see what it's currently set to by looking in /var/log/Xorg.0.log. It's worthwhile to test all four values even once you find one that works. If this takes care of it for you, we may be able to establish a quirk to set it for your hardware combo, if you can provide the following data: * AGPMode value(s) that work * Make/Model of laptop or motherboard * Is the system all factory hardware, or have any parts been replaced? * Is there an AGP Mode in the system BIOS? - If so, is it set to the factory default? For more details on this, please see the "ATI AGP Mode Quirk" section at https://wiki.ubuntu.com/X/Quirks Note, you might need to also disable KMS in order to make these quirks apply (I'm not certain though). For more information on how to turn KMS on or off please see http://wiki.ubuntu.com/X/KernelModeSetting . ** Description changed: Binary package hint: xorg After a while, my screen begins to be corrupted, showing bright pixels. These pixels seems to be "attached" to the graphical object on which they appear. For example, the bright pixels on the windows title bar move when I move the window. They are mostly randomly placed, and their place change each time a redraw of the graphical object occur. For example, the bright pixels on background of the time applet change every second. ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: xorg 1:7.5+3ubuntu1 ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1 Uname: Linux 2.6.32-19-generic i686 Architecture: i386 CurrentDmesg: - [ 21.156013] eth0: no IPv6 routers present - [ 55.488137] kjournald starting. Commit interval 5 seconds - [ 55.488168] EXT3-fs warning: maximal mount count reached, running e2fsck is recommended - [ 55.488872] EXT3 FS on sdb2, internal journal - [ 55.488881] EXT3-fs: mounted filesystem with ordered data mode. + [ 21.156013] eth0: no IPv6 routers present + [ 55.488137] kjournald starting. Commit interval 5 seconds + [ 55.488168] EXT3-fs warning: maximal mount count reached, running e2fsck is recommended + [ 55.488872] EXT3 FS on sdb2, internal journal + [ 55.488881] EXT3-fs: mounted filesystem with ordered data mode. Date: Wed Apr 7 19:00:40 2010 DkmsStatus: Error: [Errno 2] Aucun fichier ou dossier de ce type InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100119) MachineType: System Manufacturer System Name ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-19-generic root=UUID=cad49b82-547e-477f-a13d-c5f825c88e3c ro quiet splash ProcEnviron: - LANG=fr_FR.utf8 - SHELL=/bin/bash + LANG=fr_FR.utf8 + SHELL=/bin/bash SourcePackage: xorg Symptom: display dmi.bios.date: 09/02/2004 dmi.bios.vendor: Award Software, Inc. dmi.bios.version: ASUS A7V8X-X ACPI BIOS Revision 1013 dmi.board.name: A7V8X-X dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: REV 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 7 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAwardSoftware,Inc.:bvrASUSA7V8X-XACPIBIOSRevision1013:bd09/02/2004:svnSystemManufacturer:pnSystemName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnA7V8X-X:rvrREV1.xx:cvnChassisManufacture:ct7:cvrChassisVersion: dmi.product.name: System Name dmi.product.version: System Version dmi.sys.vendor: System Manufacturer glxinfo: Error: [Errno 2] Aucun fichier ou dossier de ce type system: - distro: Ubuntu - codename: lucid - architecture: i686 - kernel: 2.6.32-19-generic + distro: Ubuntu + codename: lucid + architecture: i686 + kernel: 2.6.32-19-generic + + [lspci] + 00:00.0 Host bridge [0600]: VIA Technologies, Inc. VT8377 [KT400/KT600 AGP] Host Bridge [1106:3189] + Subsystem: ASUSTeK Computer Inc. Device [1043:807f] + 01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV280 [Radeon 9200] [1002:5961] (rev 01) + Subsystem: ASUSTeK Computer Inc. Device [1043:5002] ** Summary changed: - Corrupted screen + [RV280] Corrupted screen ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: Triaged => Incomplete -- [RV280] Corrupted screen https://bugs.launchpad.net/bugs/557433 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs