This may be a bit off-topic, but I have been having problems
very occasionally with an old Dell desktop with the i810
graphics chipset and Ubuntu 10.04 it ran fine with the
earlier 8.04-based LinuxCNC. What happens is the screen
goes black, and then the bottom half stays black, the upper
half flashes wide vertical white bars on and off every
couple seconds. The kernel stays up, but X is kaput. This
can happen anywhere from twice a day to as rarely as twice a
year! Hard to know if anything you have done has fixed it.
It is apparently a well-known problem, and anything 10.04 or
later seems to have it. I've tried a number of fixes, none
of the previous ones helped. The latest one is to set up an
xorg.conf file like this :
Section "Device"
Identifier "Device0"
Driver "intel"
option "AccelMethod" "uxa"
EndSection
Section "Monitor"
Identifier "VGA1"
Modeline "1280x1024_60" 109.00 1280 1368 1496 1712 1024
1027 1034 1063 -hsync +vsync
Option "PreferredMode" "1280x1024_60"
EndSection
Section "Screen"
Identifier "VGA1"
Device "Device0"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024_60"
EndSubSection
EndSection
The specific change is option "AccelMethod" "uxa" in the
Device section.
Has anybody else fought this issue? It SEEMS that maybe the
uspace kernel does not have this problem, at least I've
never had the problem with it, but then I have not run
uspace a lot. Anyway, since making this last change, I have
not seen the issue. I won't know for at least 6 months if
this really fixed it.
Jon
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