** Description changed:
Binary package hint: xserver-xorg-video-intel
I am running an updated gutsy install on a Thinkpad X40 (so i855GM graphics)
with the -intel driver. I enabled Desktop Effects last night and the two times
I have done a suspend/resume cycle since then, on resuming, is rendered
entirely corruptly.
X appears to still function, in that i can just about make out where windows
are and I can switch desktops and see the corrupt workspaces scroll.
Giving X the three finger salute makes it come back fine.
+
+ Impact: Affects laptop users with older intel 855 graphics when they
+ suspend/resume, leading to 3D textured surface corruption (corrupt X
+ graphics) on resume forcing the user to reboot (and lose any saved
+ work). Because of this, the bug is considered serious and deserving of
+ a backported fix for Gutsy.
+
+ Solution: The proposed patch adds a one-line fix to emit an invariant
+ state at the appropriate point, to make X not become corrupted. This
+ fix was uploaded to hardy about a week ago and testers report it
+ correctly eliminates the corruption.
+
+ Patch:
+ https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/133118/comments/64
+
+ Steps to reproduce:
+ 1. On an intel 855gm graphics system, enable desktop effects
+ 2. Suspend
+ 3. Resume
+ 4. Screen graphics become garbled/corrupted (but system is still responsive,
just unusable)
+
+ Regression Potential: Low. It's a one-line change that merely modifies
+ what is allowed to be cached between state changes for older i830-class
+ hardware. The patch has been tested on various -intel chipsets by at
+ least half a dozen people without any regression seen. Some have
+ reported occasional crashes after resume, however this is believed to be
+ a separate bug not particular to i855, that this bug was simply hiding.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Target: ubuntu-7.10-rc => gutsy-updates
** Attachment added: "debdiff of proposed upload"
http://launchpadlibrarian.net/10316247/xserver-xorg-video-intel_2.1.1-0ubuntu10.debdiff
--
very corrupt X after suspend/resume
https://bugs.launchpad.net/bugs/133118
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