** Description changed:
+ SRU Justification:
+
+ Impact: X server hangs in some laptops when returning from suspend which
+ seem to be caused by not initializing certain registers of some gfx
+ chipsets.
+
+ Fix: Backport of upstream patch
+
+ Testcase: see below
+
+ ---
+
IMPORTANT: Information in this "desciption field" is incorrect. Please
read the comments for further explanation.
When I close the lid of my laptop, X "hangs" when I reopen it. The
desktop is visable, but I cannot move the mouse-pointer or use the
keyboard.
While searching though the known bugs in LP, I came across #138256. I
followed the instructions there, but noticed that when "Automatic
Login" is enabled, the issue still appears. By setting "Automatic Login"
to disabled, I resolved the issue, the instruction in #138256 weren't
needed.
If you have enabled "Automatic Login" (System -> Admin -> Login Window ->
Security), follow these steps as workaroundl:
* Add `Option "ForceEnablePipeA" "true"` in xorg.conf (as destribed in
#138256)
* "Control-Alt-Backspace"
* Enter credentials
$ lspci -vvnn | grep -A1 "VGA compat"
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile
GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 0c) (prog-if 00
[VGA controller])
Subsystem: Hewlett-Packard Company Compaq 6710b [103c:30c0]
Model: Compaq 6710b
--
Closing lid results in kernel panic visible on VT-1
https://bugs.launchpad.net/bugs/228399
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