https://bugs.freedesktop.org/show_bug.cgi?id=109955

--- Comment #130 from haro41@gmx.de ---
> > 
> > echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level
> > echo "1 2 3" > /sys/class/drm/card0/device/pp_dpm_mclk
> > 
> 
> do you have any suggestion to automate this? so far i can strictly run these
> commands after su. not even sudo works with scripts running these commands.
> or systemd files.

Currently i use my patch (see above) to workaround the crashes.
If you prefer not to touch your kernel, you could create a systemd service: 

# cat /etc/systemd/system/amd-pp.service: 

[Unit]
Description=AMD PP adjust service
[Service]
User=root
Group=root
GuessMainPID=no
ExecStart=/srv/amdgpu-pp.sh
[Install]
WantedBy=multi-user.target
---------------------------------------------------------------
# cat /srv/amdgpu-pp.sh:

#!/bin/bash
echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level
echo "1 2 3" > /sys/class/drm/card0/device/pp_dpm_mclk
---------------------------------------------------------------
#systemctl enable amd-pp.service
#systemctl start amd-pp.service
---------------------------------------------------------------

... assuming you have 'amdgpu.ppfeaturemask=0xffffffff' set ...

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