Red Hat Bugzilla – Bug 127278
Screen corruption/server segfault switching back & forth between X and text console on Silicon Motion LynxE
Last modified: 2007-11-30 17:10:45 EST
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Description of problem:
Hardware is an HP OmniBook XE with a Silicon Motion LynxE PCI chipset
with a 12.1" HPA/DSTN screen (800x600), running latest Core 2 as of
When switching from X to text console and back again, the X desktop
has slid down the screen by about 1", and sometimes to the left side
slightly such that the mouse will wrap off of the left side onto the
right, and can disappear off the bottom of the screen (but doesn't
wrap to the top again).
If I then switch to text console and back to X again, the server dies
with a segfault and restarts from init again, display restored
correctly. This can be repeated over and over again.
Problem occurs in all colour depths, 8 and 16-bit just shifts the
display, but 24-bit also shifts colours slightly, from the bluey
Fedora GDM screen to a more greeny colour.
Same hardware running Core 1/XFree86 didn't have this problem,
switching worked fine without problem.
Looks like video memory is being shifted/trampled over.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot into runlevel 5 (GDM)
2. Ctrl+Alt+F1 to text console
3. Alt+F7 back to X, desktop is now shifted down the screen by ~ 1"
4. Ctrl+Alt+F1 to text console again
5. Alt+F7 back to X, server dies and gets restarted back to normal
6. Lather, Rinse, Repeat
The siliconmotion driver has been updated in X.Org CVS for the
new release, which we have in Fedora Core development currently.
You can upgrade to xorg-x11-184.108.40.2063 or later from fedora devel,
and test the new siliconmotion driver if you like. If the new
driver also exhibits this problem, you can file a bug report in
the X.Org bugzilla located at: http://bugs.freedesktop.org in the
"xorg" component, for the driver maintainer(s) to investigate.
If you paste your upstream X.Org bugzilla URL here, we will also
track the issue for you in the upstream bugzilla.
Thanks for testing fedora devel x11.
Setting status to "RAWHIDE"