Comment 24 for bug 528981

The grub option "radeon.modeset=0" does not prevent X freezes. My system appears to last much longer between freezes / failures to resume, but still does so.

I can repeatably cause the machine to freeze by mounting cifs locations - the computer will freeze shortly into use after the next resume following the mount operation.

High system load, e.g. generating md5 checksums on a CD image while copying large files, will also cause an X freeze.

In all cases the keyboard and mouse appear unresponsive, caps lock does not alter the LED state, but Alt SysReq REISUB will reboot.