Public bug reported: Binary package hint: xorg
This worked fine up until sometime between Nov 2, 2009 and Nov 7 2009. By working fine, I mean that nvidia-settings correctly detected the resolution and the name of an external monitor, using the 185 driver. Now, all external monitors show up as CRT-0, and have a low resolution of 1024x768 in nvidia-settings. Switch back to kernel 2.6.31 from 2.6.32 does not fix it; neither does upgrading to nvidia-drivers 190.32 from 185. Investigation reveals that /var/log/Xorg.0.log contains the line: NVIDIA(GPU-0): Unable to read EDID for display device CRT-0 This problem occurs on two different external flat panels with 1900x1200 resolution, which both worked just last week. Finally, I installed read-edid, and executed the command "sudo get-edid | parse-edid" The EDID for the builtin flat panel is just fine, but is followed by: Reading next EDID block VBE/DDC service about to be called Read EDID Performing real mode VBE call Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0 Function supported Call failed The EDID data should not be trusted as the VBE call failed Error: output block unchanged parse-edid: IO error reading EDID I really don't know what could be causing this, but perhaps this change: xorg-server (2:1.6.4-2ubuntu4) karmic; urgency=low * Add 188_default_primary_to_first_busid.patch: X can abort if multiple video devices are present, and none are marked as primary. This makes X just pick the first one it sees and carry on. (LP: #459512) ProblemType: Bug Architecture: amd64 Date: Mon Nov 9 11:57:07 2009 DistroRelease: Ubuntu 10.04 MachineType: LENOVO 7662CTO NonfreeKernelModules: nvidia Package: xorg 1:7.4+3ubuntu9 PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-2-generic root=UUID=296ba5fe-f7de-4f95-a4e3-c1b699fa1490 ro ProcEnviron: PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.32-2.2-generic RelatedPackageVersions: xserver-xorg 1:7.4+3ubuntu9 libgl1-mesa-glx 7.6.0-1ubuntu4 libdrm2 2.4.14-1ubuntu1 xserver-xorg-video-intel N/A xserver-xorg-video-ati N/A SourcePackage: xorg Symptom: display Tags: resolution Uname: Linux 2.6.32-2-generic x86_64 dmi.bios.date: 05/11/2009 dmi.bios.vendor: LENOVO dmi.bios.version: 7LETC6WW (2.26 ) dmi.board.name: 7662CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr7LETC6WW(2.26):bd05/11/2009:svnLENOVO:pn7662CTO:pvrThinkPadT61:rvnLENOVO:rn7662CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 7662CTO dmi.product.version: ThinkPad T61 dmi.sys.vendor: LENOVO fglrx: Not loaded system: distro: Ubuntu architecture: x86_64kernel: 2.6.32-2-generic ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolution -- External monitor suddenly gets wrong resolution on laptop (nvidia). https://bugs.launchpad.net/bugs/479323 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