This version is now outdated and no more supported
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/538648
Title:
8086:2a42 [Intel GM45] Irregular sync flashes (Needs i915.powersave
quirk)
Status in xf86-video-intel:
Fix Released
Status in linux package in Ubuntu:
Invalid
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.
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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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