That’s awesome, as I found and tried that this morning…
GRUB_CMDLINE_LINUX_DEFAULT="udev.log_priority=3 amdgpu.runpm=0 sysrq_always_enabled=1"
but wasn’t sure it was working since when the boot process reached SDDM login, my external monitor connected to the dgpu was still blank.
Thinking it might help, I also added the amdgpu to the modules section of mkinitcpio.conf…
MODULES=(amdgpu)
Good news so far is that once in the kde desktop (post login), monitoring power_status seems to be sticking at D0 (no more D3cold)
cat /sys/class/drm/card1/device/power_state
D0
Maybe I’m making an incorrect assumption… or am looking down the wrong path… when boot reaches SDDM (pre desktop), should the external monitor connected to the dGPU also be displaying SDDM login prompt?
- If so, where should I be looking to work towards making this happen?
- If not, would you happen to know why not?