Tumbleweed upgrade fails to boot new kernel

Upgraded Tumbleweed today [sudo zypper dup] on 2 computers. The small intel laptop worked fine, the AMD A-10 APU desktop fails to boot into 5.18.15-1 kernel:

It goes into large text (VGA?) and stops at

clocksource: Switched to clocksource tsc

I can select the fallback kernel 5.18.11-1 and that boots fine.

How do I fix this? (It’s not the first time I’ve had “sudo zypper dup” on Tumbleweed break this, my primary desktop.)

If you Google the problem there is quite a read

One I found said add this to the boot line


Boot to the previous kernel, then uninstall 5.18.15. Or, instead of uninstalling 5.18.15, include spectre_v2=off in the linu line in Grub, either per boot using the E key at the grub menu, or adding in /etc/default/grub to the GRUB_CMDLINE_LINUX_DEFAULT= line and then regenerating /boot/grub2/grub.cfg. The next kernel due soon will no longer need spectre_v2=off to be on the linu line.

You may boot into a previous snapshot and rollback: https://doc.opensuse.org/documentation/leap/reference/html/book-reference/cha-snapper.html#sec-snapper-snapshot-boot You may consider to lock kernel-default and continue with upgrades.