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[Launchpad Bug Tracker <479323@xxxxxxxxxxxxxxxxxx>]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nvidia-graphics-drivers (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/479323

Title:
  External monitor suddenly gets wrong resolution on laptop (nvidia).

Status in “nvidia-graphics-drivers” package in Ubuntu:
  Confirmed

Bug description:
  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

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