https://bugs.freedesktop.org/show_bug.cgi?id=91880
--- Comment #207 from emilio.moretti@gmail.com --- (In reply to Sandeep from comment #206)
You've got to make sure that radeon and amdgpu drivers don't clash.
Try the following kernel parameters: radeon.si_support=0 radeon.cik_support=0 amdgpu.si_support=1 amdgpu.cik_support=1 amdgpu.dpm=1
That's what I use and it works fine for me.
Thanks, but I did that. Here is my process:
Stable system configuration (power management doesn't crash): 1) Make sure amdgpu is blacklisted: # vim /etc/modprobe.d/blacklist.conf -> add "blacklist amdgpu" at the bottom # update-initramfs -u -k all
2) Update grub parameters: # vim /etc/default/grub -> Set the correct defaults: GRUB_CMDLINE_LINUX_DEFAULT="radeon.cik_support=1 amdgpu.cik_support=0" # update-grub
3) reboot the system
Unstable system configuration (power management crashes the entire system when it tries to power off the monitors): 1) Make sure amdgpu can be loaded: # vim /etc/modprobe.d/blacklist.conf -> add "blacklist amdgpu" at the bottom # update-initramfs -u -k all
2) Update grub parameters: # vim /etc/default/grub -> Set the correct defaults: GRUB_CMDLINE_LINUX_DEFAULT="radeon.cik_support=0 amdgpu.cik_support=1 amdgpu.modeset=1 amdgpu.dc=1 amdgpu.dpm=1" # update-grub
3) reboot the system
It's a fairly easy way to test it as is freezes every time you leave the PC idle. I haven't seen it crash during my daily usage, but it does crash when the power management kicks in.