Bug#601997: Irregular sync flashes on 8086:2a42 (Needs i915.powersave quirk)
On Mon, 2010-11-01 at 21:55 +0000, Alexis de Lattre wrote:
> You will find an up-to-date summary of the situation at the very
> beginning of the bug report (your bug report ! :-), in the 3 first
> paragraphs of the bug description.
I think the problem is that when Julien looked at this bug report, it
wasn't clear which kernel version is the one that provides the fix so
that the Debian folk can investigate whether they can issue that kernel
> ** Description changed:
> Fixed in maverick
> Not fixed in lucid (bug still seen on 2010-09-22 with kernel 2.6.32-25)
Debian Squeeze is still running the 2.6.32-5-amd64 kernel, Maverick is
running 2.6.35-22. Does anyone know which changeset to which kernel
series actually cures the problem? Do we even know whether this is a
2.6.32, 2.6.33, 2.6.34 or 2.6.35 issue?
> 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 #88).
> + Compile your kernel with Andy Whitcroft's patch from http://people.canonical.com/~apw/lp538648-lucid/ (see comment #92).
I am not sure this is an option for the Debian folk, they need to run a
kernel from the official series.