Comment 131 for bug 541511

Hi guys,

It is a shame that things are not working. Unfortunately reverting
things has also broken things.

Just a data point - reverting KMS has now impacted me. (with KMS
things would work occassionaly).

I am not no longer able to boot to an operational graphical environment.

i855M (PCI ID: 8086:3582, subsystem: 1028:018d) rev 02

kernel: linux-image-2.6.32-21-generic (2.6.32-21.32)
gdm: 2.30.0-0ubuntu5
X:xserver-xorg-server-intel (2:2.9.1-3ubuntu4), intel-gpu-tools
(1.0.2+git20100324-0ubuntu1)

Anand

On Thu, Apr 15, 2010 at 7:25 AM, Rick Spencer
<email address hidden> wrote:
> This is an unfortunate situation. There is a non-trivial number of users
> with 845 and 855 chips who are impacted by a regressions in stability in
> the current x stack when running 3d and KMS.
>
> We have opted for a "stability first" approach for these users. We will
> disable 3D and KMS for these chips in Lucid final release. This will
> have the unfortunate effect of disabling compiz. This will introduce a
> functional regression. So we will be sacrificing functionality for these
> users in favor of stability. This is a painful choice to make, but we
> feel that stability must trump functionality when we are forced to make
> such choices.
>
> We will be pursuing functional fixes. However, we will do this outside
> the main release, for example in a PPA. If we are able to provide a fix
> that delivers stability and functionality, we will consider this a
> potential SRU in 10.04.1.
>
> --
> MASTER: [i855] GPU lockup (apport-crash)
> https://bugs.launchpad.net/bugs/541511
> You received this bug notification because you are a direct subscriber
> of a duplicate bug.
>
> Status in X.org xf86-video-intel: Confirmed
> Status in “xserver-xorg-video-intel” package in Ubuntu: Triaged
> Status in “xserver-xorg-video-intel” source package in Lucid: Triaged
>
> Bug description:
> Binary package hint: xserver-xorg-video-intel
>
> This is a MASTER bug report, i.e. not a real bug report, but a tool to help manage other bug reports.
>
> Most bug reports on i855 are probably due to the CPU/GPU incoherency problem that is now consolidated upstream at http://bugs.freedesktop.org/show_bug.cgi?id=27187 (which was split off from a bug report for i845). For now, we mark all automatically reported GPU lockups on i855 as duplicates of this unless there is a reason not to. There are some tests you may do to help upstream with this issue, and I will come back with instructions here. For those of you who know how to patch and compile a kernel you may look at comment #30 (and #6 for what kind of feedback they want) in the upstream bug report. Actually, if someone could volunteer to build an ubuntu-packaged kernel with this patch for others to test, that would be nice.
>
> There is a similar master bug report for i845 at bug 541492.
>
>
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/541511/+subscribe
>
>