F12 updates-testing issue: X flickers and fails to start

[Linuxguy123]

On Wed, 2009-12-09 at 06:27 -0700, Linuxguy123 wrote:
> On Wed, 2009-12-09 at 10:36 +0100, Michal Schmidt wrote:
> > On Wed, 9 Dec 2009 11:12:07 +0200 (EET) Pekka Savola wrote:
> > > Now gdm login however doesn't show my username and fingerprint login 
> > > is no longer an option
> > 
> > Looks like the issue with hal-0.5.14-1:
> > https://admin.fedoraproject.org/updates/F12/FEDORA-2009-12840
> 
> 
> I think it has something to do with display power management and the
> monitor brightness level. I can replicate the behavior by simply
> adjusting the display brightness in a KDE session.
> 
> I have logged 2 bugs that are possibly related to this.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=528188
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=525767
> 

I recommend connecting an external monitor to see if the issue is
display specific and have you tried ctrl-alt-F6 to get to a console at
login and then going back to the X session with ctrl-alt-F1 ?