OK, then the latest crash at boot was indeed a regression of amdgpu firmware. Just to make sure: the oldest kernel-firmware found in OBS history repo is: http://download.opensuse.org/history/20200907/tumbleweed/repo/oss/noarch/kernel-firmware-amdgpu-20200807-1.2.noarch.rpm Could you try to downgrade to this version and retest? Also, please try to boot with "firmware_class.dyndbg=+p" boot option, and give the dmesg output. This will contain the debug prints showing which firmware files are loaded.