This problem developed after two events in quick succession. The first was
installation of the Radeon driver from ATI's website. A few hours later, the
xorg 6.8.2 update was applied via yum. The desktop is relatively stable, but
activation of any program would cause the screen to start blanking to black,
quickly increasing in frequency to once every 3-5 seconds.
My first remedy was to remove the Radeon driver from ATI. - no change
My second was to revert the xorg back to 6.8.1 - that cured the problem
Then I reapplied xorg 6.8.2 and the problem returned.
The machine is a P4 and the Radeon card is the 9200SE.
The upshot is this may not be an xorg bug at all, but, a conflict left by some
residue of the driver from ATI, but then again, it seems worth reporting.
I should also note that I'm using a Dell 2000FP LCD monitor in DVI mode.
I've found the workaround for this problem. Disconnecting DVI, and connecting
the monitor via VGA, has solved the issue. Tonight I had tried some other
suggestions such as turning off DPMS and commenting it out in xorg.conf, but
this did not work. As soon as I applied what is now 6.8.2-1.FC3.13.i386,
tonight, the flashing returned. Then I substituted the cables and reconfigured
the display settings, and now the display is absolutely stable.
I have the same problem with a ATI Radeon VE/7000 QY conntected to a LCD monitor
via DVI on a Fedora-Core-3 system (Athlon Thunderbird, KT133). It started after
I've upgraded to xorg-x11-6.8.2-1.FC3.13 (6.8.1 was OK). I've tried to disable
DPMS, set different values for the DisplayPriority and DynamicClocks options --
nothing helps (but downgrading to 6.8.1 makes the blanking go away).
I don't think that the driver from ATI's website has anything to do with this
as I have never installed it.
I have exectly the same problem with an Intel motherboard D865GLC, with an
integrated Intel video card 865, 512 MB RAM and a fully updated Fedora Core 3
(xorg-* 6.8.2-1). Same increase of frequency with time. Screen blanker and
DPMS both disactivated. Problem worses displaying lot-of-color images (e.g.
"display photo.jpg", or selecting a large resolution jpg background in Gnome).
I am desperate, the computer is unusable after a short time. Any idea? Would
help an upgrade to Fedora Core 4 beta-test (3.92)? Or should I wait for the FC4
release around June 10?
*** This bug has been marked as a duplicate of 2859 ***