My bad, I forgot to set the default boot to the new test kernel 6.12.7, was still booting to 6.12.4 that has no issues. Test kernel 6.12.7 still has the same problem with monitor flicker and going black after resuming from suspend.

Sorry.

Works fine on HP Elitebook 845 G8, fixed issue with monitor flicker and going black after resuming from suspend.

https://bugzilla.redhat.com/show_bug.cgi?id=2333543

https://discussion.fedoraproject.org/t/f41-kernel-6-12-5-weird-issue/140434/