Red Hat Bugzilla – Bug 514106
intel flickers badly on screen updates
Last modified: 2014-03-16 23:19:30 EDT
Description of problem:
Upon booting the rawhide kernel, I have a perfectly stable X image... as long as the screen is not updating. On any update, the image jumps about 500 pixels to the right for a tenth of second before snapping back. It's pretty trippy.
Version-Release number of selected component (if applicable):
Once is enough
Steps to Reproduce:
1. Install new kernel.
Chaos on any screen updates.
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
[notting@nostromo: ~]$ xrandr
Screen 0: minimum 320 x 200, current 1400 x 1050, maximum 4096 x 4096
VGA1 disconnected (normal left inverted right x axis y axis)
LVDS1 connected 1400x1050+0+0 (normal left inverted right x axis y axis) 287mm x 215mm
1400x1050 60.0*+ 50.0
DVI1 disconnected (normal left inverted right x axis y axis)
Hmm. This was just before I added the PM code, so I think this is Kristian's problem rather than mine.
Backing down to 2.6.30-6.fc12 works. Haven't tried anything else in between yet.
*** Bug 514985 has been marked as a duplicate of this bug. ***
Persists in .118.
krh suggested that this could be an issue with the "fifo watermark" that Jesse Barnes @ Intel is trying to fix.
kernel-2.6.31-0.123.rc5.git2.fc12 or later includes jesse's watermark fixes. Give that a try?