ok now a clean answer:
- Add the options to modprobe:
sudo su && \
echo "options amdgpu si_support=1" >> /etc/modprobe.d/amdgpu.conf
echo "options amdgpu cik_support=1" >> /etc/modprobe.d/amdgpu.conf
echo "options radeon si_support=0" >> /etc/modprobe.d/radeon.conf
echo "options radeon cik_support=0" >> /etc/modprobe.d/radeon.conf
- add this to /etc/mkinitcpio.conf:
MODULES=(amdgpu radeon)
and
mkinitcpio -P
reboot
Then check with inxi -Ga
if you use DRM 3 like this:
Is that correct @TheHaricover ?