Created attachment 211021 [details]
Previous boot dmesg: journalctl -k -b -1

* Facts

** Video freezes from time to time (randomly) after Dell E7450 being plugged into docking station with two external FHD displays attached (DP1-1 and DP1-2 in xrandr).

** I've got background shell script running which detects udev change and calls xrandr to enable two external displays - so this issue might happend after xrandr command or after plug-event itself (not really able to verify, it will be difficult to work without it running)

** I was hitting shutdown button after crash, so there might be shutdown-related events in log (at the end, I've hold it until system halted)

* Guesses

** According to LEDs (not tested with SSH yet)  system is responding normally after video freeze - disk LED blinks from time to time.

** One of external monitors might be already reading „empty signal” (if I understand correctly, it is no longer reporting that there is no signal, but instead it acts like there is perfectly black image displayed)

* Attachments

** dmesg log from the crashed boot.