https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #12 from Cyrax (evvke@hotmail.com) --- Created attachment 288873 --> https://bugzilla.kernel.org/attachment.cgi?id=288873&action=edit dmesg from 5.6.8
Additionally dmesg output shows this line : note: kworker/0:3[2251663] exited with preempt_count 1
It seems that this bug occurs when the monitor is turned off and then on repeatedly with short delay between.