Created attachment 48688 [details]
Xorg.0.log + kdm.log
While using Firefox 5, the screen freezes and CPU usage goes up to 100%. A little later the console appears in fullscreen mode and the KDE Desktop gets restarted automatically. I didn't do anything.
kdm: X server for display :0 terminated unexpectedly
0: /usr/bin/X (xorg_backtrace+0x26) [0x4a2656]
1: /usr/bin/X (0x400000+0x621ca) [0x4621ca]
2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fe96976d000+0xfc60) [0x7fe96977cc60]
3: /usr/bin/X (0x400000+0x3d7e5) [0x43d7e5]
4: /usr/bin/X (ProcUngrabKeyboard+0xd4) [0x43b4d4]
5: /usr/bin/X (0x400000+0x2e2a9) [0x42e2a9]
6: /usr/bin/X (0x400000+0x21a7e) [0x421a7e]
7: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xff) [0x7fe9686b6eff]
8: /usr/bin/X (0x400000+0x21629) [0x421629]
Segmentation fault at address 0x211
For once this doesn't immediately seem driver related.
Created attachment 54090 [details]
kdm.log, Xorg.0.log, syslog
X.Org X Server 1.10.4 crashed while watching a flash video in Firefox.
I don't see a backtrace in your second set of logs. Did it really crash? Also, what makes you think that this is the same issue rather than a different crash? Is it reproducible; if so, how?
Mass closure: This bug has been untouched for more than six years, and is not obviously still valid. Please file a new report if you continue to experience issues with a current server.