I've done a fresh install of Kubuntu 7.4, yet still I'm having the same
problem.
My motherboard has a build in graphic card (Trident), but I'm using (and
want to use) the Radeon 9250 SE graphic card. Also the Radeon card has
support for running dual displays. I'm using the VGA output, not the DVI
output.
I've noticed that lspci shows the Radeon card at PCI Bus 00:0a.0 and
00:0a.1 (That is if I'm reading lspci bus output correctly). But
strangely the xorg.conf file shows the card at PCI:0:10:0. I don't know
if that's normal, and could be causing the problem, I don't know.
I've done memtest several times for several hours with no errors. My RAM
doesn't seem to be the problem. If there is a hardware failure it's
somewhere other than RAM. Are there any other hardware tests?
I did find out that the line in the xorg.conf file:
Option "AccelMethod" "EXA"
Was causing corruptions in the title bar, so I disabled it, but I still have
the original problems.
I've looked through the BIOS settings and found some related to
shadowed/cached BIOS/video memory/ram. I've loaded the default setting
for most (but not all) of the BIOS options, but still have the problem.
I've deduced the problem must be either:
1) Malfunctioning hardware (graphic card, mother board, etc.,) .
2) Incorrect BIOS settings.
3) Incorrect xorg.conf file.
4) Malfunctioning driver.
5) Other malfunctioning system software.
Kubuntu 7.4 (final not beta) has slightly different xorg.conf file, so
I've attached that file with .feistyfinal extension.
--
xserver bug: random lockups, blank/garbled screen, resolution changes
https://bugs.launchpad.net/bugs/93925
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