Being on latest 6.8 kernel, watching online movie → got frozen/unresponsive image with recurring sound and blinking caps-lock → powered off/powered on → got ACPI error with unbootable state (details is on the screenshot)
power off/power on → switched to 6.7 kernel → system loaded normally
In view of the above, kernel 6.7 marked as unsupported (yet works) and 6.8 unexpectedly fails.
It’s recommended to use an LTS kernel like 6.6 or 6.1. Have you tried either of those?
Note that I’ve removed your uploaded images as they do not help anyone help you. Images also make the forum backup larger and cannot be indexed by search engines. Please post logs instead.
In scope of general observations: I’ve just got kernel panic (blinking caps-lock) on 6.6.26 LTS when unplugging cabled USB-mouse on resume event. Update: one day after the above, it happened again but on screen-locking event (not on resume from suspend).
I’d say on kernel series 6.x I had the most kernel panics (with blinking caps-lock) compared to previous kernels.