Salix Forums

hm,...
Sorry my 2 laptops have intel graphics!
There it is not necessary to slow down the fan!
So i dont know about Laptop and ati-graphics...
But I have an Desktop PC with an Radeon HD 5770 and every Distrubtion i tried with open source driver
let the fan blown in full speed.
I think the most straightforward method is to write it in the "rc.local"-file!
So you don't need to compile a new kernel.
Here some outputs:

cat /etc/rc.d/rc.local
#!/bin/bash
#
# /etc/rc.local: Local multi-user startup script.
#
echo low > /sys/class/drm/card0/device/graphics/fb0/device/power_profile
#####
cat /sys/class/drm/card0/device/graphics/fb0/device/power_method
profile
#####
cat /sys/class/drm/card0/device/graphics/fb0/device/power_profile
low
#####
cat /sys/class/drm/card0/device/power_method
profile
#####
cat /sys/class/drm/card0/device/power_profile
low

("/sys/class/drm/card0/device" is a link!)

Or you install the ATI-driver - then the "rc.local" is not necessary!

You can add the commands in your /etc/rc.d/rc.local so that they are run at every boot.

Edit: oops, sorry, didn't see sjox's answer. Posting from my phone...

I forgot to mention that I think I discovered why my laptop worked well with Antergos and SolydXK. According to the Arch Wiki ATI entry, kernels >= 3.13 have Dynamic Power Management (DPM) automatically built in.

Thank you sjox and gapan for the info on how to get the power management to be persistent. I'll give it a go and if it works, this thread can finally be marked solved.