Bug 34137 - Kernel null pointer dereference with 2.6.38_rc4, pageflip, Radeon 6310, KDE
Summary: Kernel null pointer dereference with 2.6.38_rc4, pageflip, Radeon 6310, KDE
Status: RESOLVED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
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Reported: 2011-02-10 07:47 UTC by Chí-Thanh Christopher Nguyễn
Modified: 2011-04-14 10:53 UTC (History)
0 users

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Attachments
dmesg with BUG and call trace (69.08 KB, text/plain)
2011-02-10 07:47 UTC, Chí-Thanh Christopher Nguyễn 		no flags Details
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Description Chí-Thanh Christopher Nguyễn 2011-02-10 07:47:03 UTC 
Created attachment 43206 [details]
dmesg with BUG and call trace

Using kernel 2.6.38_rc4, xf86-video-ati 6.14.0, Radeon 6310 (Zacate), KDE 4.4

When starting KDE the graphics will freeze before the desktop appears, possibly when kwin attempts to enable desktop effects. In dmesg, the following appears along with a call trace containing radeon_crtc_page_flip:

 [ 1297.514583] BUG: unable to handle kernel NULL pointer dereference at           (null)

Afterwards, the system must be rebooted to get the graphics back. Setting Option "EnablePageFlip" "false" in xorg.conf makes the problem go away.
Comment 2 Chí-Thanh Christopher Nguyễn 2011-03-11 04:26:36 UTC 
Yes, thank you. With the patch the problem is fixed.

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