Should I try
Following options will not change the config file.
These options will be effective immediately. Other options on
the same command line will be ignored.
Print information about power states and exit.
Set a power state listed by --list-powerstates.
Enable/disable automatic transitions between battery and performance
modes on AC/DC transitions. This automatic mode is enabled by default,
and may compete with atieventsd style power management.
Any problems/downside to this other than using the battery much faster?
$sudo aticonfig --auto-powerstates=off