Fedora 38 / kernel 6.3 / external monitor issue

Fedora 38 with Gnome / kernel 6.3 / AMD Ryzen 5 4600H with integrated graphics - my external monitor (HDMI) is in on/off signal loop. The monitor catches a signal and tries to turn on, then displays a message about no signal and going into standby mode, and so on… On older kernel 6.2 everything is fine. What can I do with this issue? How to diagnose the problem?

Have a look at the output of dmesg. There maybe a clue there.

You may need to boot on the old kernel until there is a fix/solution for the 6.3 kernel.