http://bugs.freedesktop.org/show_bug.cgi?id=20235
Summary: [i915] [Regression] VT switch and suspend to disk broken
Product: DRI
Version: unspecified
Platform: x86 (IA32)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Intel
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=23139)
--> (http://bugs.freedesktop.org/attachment.cgi?id=23139)
dmesg
My system:
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960
Integrated Graphics Controller (rev 0c)
kernel: airlied's drm-fixed branch as of 2009-02-20 (commit:
**
author etienne <[email protected]>
Thu, 19 Feb 2009 23:44:45 +0000 (09:44 +1000)
drm/radeon: update sarea copies of last_ variables on resume.
**
)
>From debian experimental:
xserver 1.5.99.902
mesa 7.3
libdrm 2.4.4+git+20090205
intel 2.6.1
Acceleration: UXA
VT switch and suspend to disk are broken. Even restarting or shutting down from
X (KDE) makes the system freeze with a black screen.
Attached are dmesg taken (by ssh) after rebooting from KDE and Xorg.log.
According to the dmesg output, the problem seems to be:
BUG: unable to handle kernel NULL pointer dereference at 00000050
IP: [<f87a009d>] i915_gem_cleanup_hws+0x1d/0x70 [i915]
I have used git-bisect and found that the first bad commit is:
**
author Chris Wilson <[email protected]>
Wed, 11 Feb 2009 14:52:44 +0000 (14:52 +0000)
commit 85a7bb98582b60b7e9130159d2464eb0bbac13f7
drm/i915: Cleanup the hws on ringbuffer constrution failure.
If we fail to create the ringbuffer, then we need to cleanup the allocated
hws.
**
Reverting this single commit makes everything work again.
regards,
Stefano
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