gtk apps crash X in 8.04

[Larry Hartman]

On Monday 12 May 2008 01:10:43 pm Dexter Filmore wrote:
> Showstopper: when I enter text in a gtk app (tested with firefox-2 and
> OpenOffice Writer) sooner or later X will freeze. Mouse pointer still
> works, machine is running, I can even ssh in and shutdown cleanly, even ssh
> -X and run X apps remotely, but the local display stays dead until the
> machine reboots, can't even switch to ttys.
>
> This renders the system unusable to me.
>
> Anyone else got this? I already filed a bug report, no answer so far.
> Friend of mine experienced this, too tho he could switch to tty and restart
> X/kdm.
>
> He has an NVidia GF 6800 AGP, I got an X800XT (R420) AGP, both nForce 2
> mobos.

I have similar issues.  I am not sure though that it is related to gtk.  Mine 
freezes when the system is logged in and has nothing running except various 
system tray icons.  No restart X, no TTYs, but mouse moves.  Have to hard 
kill machine to bring back to life.  

I suspect something to do with power management.