Comment # 2 on bug 1206977 from Don Hughes

Same problem on an ASUS Strix G512 with an Nvidia GeForce GTX 1660Ti.

This was an existing Leap 15.4 installation.  yast did a kernal update from
5.14.21-150400.24.46.1 to 24.49.3 and the system froze as above on re-boot. 
Only way to regain control was power cycle the system.  Re-booted and used grub
to add nomodset and was able to boot the system.  I downgraded back to the
24.46.1 kernel and the system is again working as expected.  Kernels were
installed from download.opensuse.org/update/leap/15.4/sle