Terrible display flickering after FC5 update today

[Johannes Erdfelt]

On Wed, Oct 25, 2006, Tom Horsley <tomhorsley at adelphia.net> wrote:
> On Wed, 25 Oct 2006 12:53:58 -0400
> Neal Becker <ndbecker2 at gmail.com> wrote:
> 
> > Neal Becker wrote:
> > 
> > > After today's fc5 update, I now have a horrible random flickering on my
> > > display.  I only hope fc6 (when I can finally get bt to download it) will
> > > repair it.
> > 
> > Went away after reboot.  This is probably just a different manifestation of
> > an (apparent) race condition with starting the X server.
> 
> Not sure what you mean by flickering, but with my radeon I have noticed
> (much more often on FC6 test than FC5) that it sometimes acts like the dpms
> monitor shut-down stuff gets triggered randomly every few seconds. It will
> go through a really bad time, then it will stop happening for a while. Video
> just keeps turning on and off. If I reboot enough, I'll eventually get
> to a state where it no longer does it (until the next time I reboot :-).

What monitor do you use?

I had a similar problem with my Dell 2000FP. Turned out to be a timing
problem between the ATI card and the monitor.

I was able to hack my X driver to use a lower timing and almost
completely solve the problem (every blue moon it would flicker once).

You can also check the archives for past discussions.

JE