Changing radeon card power profile

English Hardware
#1

How can I set my radeon graphics card to use low power?

This was my previous thread:
https://forums.opensuse.org/showthread.php/500799-Run-command-as-SU-on-startup

After distro hopping for a while I’m back again in OpenSuse and that method is no longer working for me. Something has changed since september last year!

55860e64:/home/user # systemctl status radeon-power_profile.service
radeon-power_profile.service - Radeon Power Profile
   Loaded: loaded (/usr/lib/systemd/system/radeon-power_profile.service; enabled)
   Active: inactive (dead) since Fri 2015-02-20 03:24:42 EET; 2s ago
  Process: 20370 ExecStart=/bin/sh -c /usr/sbin/radeon-power_profile ${POWER_PROFILE} (code=exited, status=0/SUCCESS)
 Main PID: 20370 (code=exited, status=0/SUCCESS)

Feb 20 03:24:42 55860e64 sh[20370]: /usr/sbin/radeon-power_profile: line 32: echo: write error: Invalid argument

So what can I do to quieten my radeon card fans this time? Thanks!

#2

Hi
So does /sys/class/drm/card0/device/power_profile exist?


cat /sys/class/drm/card0/device/power_profile
ls /sys/class/drm

Just need to see where the target is…

#3

Hi,

user@55860e64:~> cat /sys/class/drm/card0/device/power_profile 
default

and

user@55860e64:~> ls /sys/class/drm
card0       card0-DP-2     card0-DVI-I-1   controlD64  ttm
card0-DP-1  card0-DVI-D-1  card0-HDMI-A-1  renderD128  version
#4

Hi
So open a terminal and switch to root user;


su -
echo "low" > /sys/class/drm/card0/device/power_profile
cat /sys/class/drm/card0/device/power_profile

Does this change it?

Also which display port is being used on the system?

#5

Nope, doesn’t work.

55860e64:~ # echo "low" > /sys/class/drm/card0/device/power_profile
-bash: echo: write error: Invalid argument
55860e64:~ # cat /sys/class/drm/card0/device/power_profile
default

I’m sorry, how do I know ‘which display port’ it is?

#6

On Fri 20 Feb 2015 04:46:01 PM CST, MikkoFinell wrote:

Nope, doesn’t work.

55860e64:~ # echo “low” > /sys/class/drm/card0/device/power_profile
-bash: echo: write error: Invalid argument
55860e64:~ # cat /sys/class/drm/card0/device/power_profile
default

Hi
Ok, if you fire up YaST → System → Bootloader and on the Kernel
parameters tab and in the ‘Optional Kernel Command Line Parameters’
between ‘quiet showopts’ add radeon.dpm=0 then reboot and try the echo
command again.


quiet radeon.dpm=0 showopts

–
Cheers Malcolm °¿° LFCS, SUSE Knowledge Partner (Linux Counter #276890)
SUSE Linux Enterprise Desktop 12 GNOME 3.10.1 Kernel 3.12.36-38-default
If you find this post helpful and are logged into the web interface,
please show your appreciation and click on the star below… Thanks!

#7

Hey

YEP!!! That worked! Okay, how to make it permanent?

#8

Sorry, disregard that, it seems great now, thanks!

#9

On Fri 20 Feb 2015 11:46:02 PM CST, MikkoFinell wrote:

Hey

malcolmlewis;2696035 Wrote:
> Hi
> Ok, if you fire up YaST -> System -> Bootloader and on the Kernel
> parameters tab and in the ‘Optional Kernel Command Line Parameters’
> between ‘quiet showopts’ add radeon.dpm=0 then reboot and try the echo
> command again.

YEP!!! That worked! Okay, how to make it permanent?

Hi
So the systemd service should now work fine?

It’s a change in the kernel from >= 3.13 this machine is on 3.12 (SLED
12) so didn’t pick that up, plus have switched to fglrx… need to add a
blacklist entry by the looks. Have a netbook with an ati card, will
stick openSUSE on it and test.

–
Cheers Malcolm °¿° LFCS, SUSE Knowledge Partner (Linux Counter #276890)
SUSE Linux Enterprise Desktop 12 GNOME 3.10.1 Kernel 3.12.36-38-default
If you find this post helpful and are logged into the web interface,
please show your appreciation and click on the star below… Thanks!