I would like to check the difference between the power management profile 
settings of 'default' and 'auto' for my radeon card.  I can change it from 
default with:

# echo auto > /sys/class/drm/card0/device/power_profile

# cat /sys/class/drm/card0/device/power_profile 
auto

but, upon reboot it has reverted back to 'default'  :-(


I looked under sysctl but can't find anything.  How can I set the profile to 
'auto' to survive between reboots? 
-- 
Regards,
Mick