--- Comment #2 from Iakov Karpov firstname.lastname@example.org --- (In reply to Takashi Iwai from comment #1)
It's some GPU hang that leads to the real kernel crash.... which happened on others sometimes, too. Unfortunately there is no fix for this and likely not for Leap 15.2 kernel.
Could you try the kernel in OBS Kernel:stable or SLE15-SP3 kernel in OBS Kernel:SLE15-SP3? The latter contains the backport of DRM stack up to 5.9.x.
kernel 5.3.18-100.g3524980 of Kernel:SLES15-SP3 won't boot on this machine (stuck right after bootloader, not even a single line after "loading initrd" on screen.
Testing with Kernel:stable may require some time.