First thing I notice is that the mouse cursor freezes as I'm using it, then I hit the CAPS LOCK key and the LED indicator doesn't respond. Then I try the "REISUB" command, but it doesn't do anything either. Only a hard reset works, pressing down the power button for a few seconds.

How to reproduce?
I couldn't figure out a consistent method. It is still random to me.

Version: Ubuntu 4.18.0-10.11-generic 4.18.12
System information attached.

Also happens under Arch Linux and Fedora.
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