Comment 26 for bug 333377

While trying to debug Bug 23666 (which seems to be a duplicate of this bug), I've also bisected to the same commit. I've found a very reliable way of reproducing this bug: If I unplug or plug my AC adapter and then (within a few seconds) switch from text to X, the machine freezes.

Also, it seems that the first radeon driver version you load determines the behaviour. That is, during bisecting I've had a few occasions where I booted using a bad version, installed a good version, restarted X and then it would still freeze (and also the other way around). Perhaps that helps?