For comment #27, #28 - I have an Optiplex GX270 and a laptop which can't be set
to ondemand or conservative. It seems to be a problem with any computers I have
which use p4_clockmod - try:
$lsmod | grep p4_clockmod
The only workaround I've found is to install and start powernowd with the
system,
I've had this happen twice now and noticed it was when I was trying to
use hibernation or standby. Does anyone know anything about this or any
way to avoid it in the future if it's related to hibernation? I've fixed
it twice now on two different computers. One time I used the grub
console I think,