kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Summary changed:

- [Intel GM45] Irregular sync flashes on 8086:2a42 (Needs i915.powersave quirk)
+ 8086:2a42 [Intel GM45] Irregular sync flashes (Needs i915.powersave quirk)

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https://bugs.launchpad.net/bugs/538648

Title:
  8086:2a42 [Intel GM45] Irregular sync flashes (Needs i915.powersave
  quirk)

Status in X.org xf86-video-intel:
  Fix Released
Status in “linux” package in Ubuntu:
  Triaged
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Invalid

Bug description:
  [Status]
  Fixed in maverick
  Not fixed in lucid (bug still seen on 2010-09-22 with kernel 2.6.32-25)

  [Workaround]
  As workaround add the option i915.powersave=0 to the kernel command line in the grub config (for GRUB 2: edit /etc/default/grub and add  i915.powersave=0 to GRUB_CMDLINE_LINUX, then run sudo update-grub; for GRUB 1: edit /boot/grub/menu.lst and add i915.powersave=0 to the end of the line beginning with # kopt=, then run sudo update-grub).

  [Alternative workaround for experts]
  Compile your kernel with Andy Whitcroft's patch from http://people.canonical.com/~apw/lp538648-lucid/ (see comment #92).

  [Report]
  Binary package hint: xserver-xorg

  When I first installed Lucid on my T500 I believe everything seemd to
  be fine with the display.  Recently though the screen has started
  giving flashes -- as though there was some form of sync problem for
  the display.  The flashes are of irregular frequency and occurrence.
  I haven't yet seen any pattern to the behaviour.  They are however
  exceptionally annoying.

  I believe I  am using the Intel chipset graphics device -- I am not
  actually aware of how to switch to using the alternate graphics
  hardware, but I am told it is not worth bothering with, so I haven't.

  I am using the Compiz window manager so I guess the problem could be
  there rather than with Xorg.

  There is no xorg.conf file so there is no overide of the default
  behaviour.

  I am not sure what programs to run to give useful output for this problem.  I have attached the current Xorg log file.
  ---
  Architecture: amd64
  DistroRelease: Ubuntu 10.04
  DkmsStatus:
   virtualbox-ose, 3.1.4, 2.6.32-17-generic, x86_64: installed
   virtualbox-ose, 3.1.4, 2.6.32-16-generic, x86_64: installed
   virtualbox-ose-guest, 3.1.4, 2.6.32-17-generic, x86_64: installed
   virtualbox-ose-guest, 3.1.4, 2.6.32-16-generic, x86_64: installed
  InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100224.1)
  MachineType: LENOVO 20827SG
  Package: xserver-xorg-video-intel 2:2.9.1-1ubuntu16
  PackageArchitecture: amd64
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-17-generic root=UUID=d075e3b9-f26d-4896-9983-4afe962b115a ro quiet splash
  ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
  Tags: lucid lucid
  Uname: Linux 2.6.32-17-generic x86_64
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 01/09/2009
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6FET56WW (2.02 )
  dmi.board.name: 20827SG
  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:bvr6FET56WW(2.02):bd01/09/2009:svnLENOVO:pn20827SG:pvrThinkPadT500:rvnLENOVO:rn20827SG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20827SG
  dmi.product.version: ThinkPad T500
  dmi.sys.vendor: LENOVO
  system:
   distro:             Ubuntu
   codename:           lucid
   architecture:       x86_64
   kernel:             2.6.32-17-generic

  [lspci]
  00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
   Subsystem: Lenovo Device [17aa:2114]

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