Created attachment 845210 [details]
lspci

I cannot boot any kernel version starting from 5.10...
Problem started with the kernel update from Tumbleweed 20201223. All later
updates are of no help. System does not boot with the workaround suggested
https://bugzilla.opensuse.org/show_bug.cgi?id=1180344. It also does not leave
log messages in journalctl even in recovery mode.

Running fine with: 
Linux version 5.9.10-1-default (geeko@buildhost) (gcc (SUSE Linux) 10.2.1
20201117 [revision 98ba03ffe0b9f37b4916ce6238fad754e00d720b], GNU ld (GNU
Binutils; openSUSE Tumbleweed) 2.35.1.20201112-1) #1 SMP Mon Nov 23 09:08:45
UTC 2020 (b7c3768)

BOOT_IMAGE=/boot/vmlinuz-5.9.10-1-default root=UUID=n
resume=/dev/disk/by-uuid/n splash=silent quiet showopts amdgpu.si_support=1
radeon.si_support=0 acpi_backlight=amdgpu_bl0

tumbleweed installed: 20210107
kernel-default-5.10.4-1.1.x86_64
kernel-default-5.10.3-1.2.x86_64
kernel-default-5.9.10-1.1.x86_64

ASUS X550IU, BIOS X550IU.308 04/19/2019