On the occasions that the machine doesn't /appear/ to be shutting down. Could you try leaving it 5 minutes and see if it did infact power-off in the end?
Could you also check whether this problem occurs using the open-source 'ati' driver, instead of the 'fglrx'.
These two points should help to track down the likely causes.
On the occasions that the machine doesn't /appear/ to be shutting down. Could you try leaving it 5 minutes and see if it did infact power-off in the end?
Could you also check whether this problem occurs using the open-source 'ati' driver, instead of the 'fglrx'.
These two points should help to track down the likely causes.