@stickyrib with the 2.4 release a heating problem arose with heavy cpu usage due to electron. Is was adviced tot use the fkms (see post michael). When i followed up on this post both alternatives did not work out for me. One option got me star night like flickering in the widgets on screen, the other led to what you described. So I returned to the driver which was used up unto 2.3.
Never thought about powering via the monitor to be the probleproblem/solution, but I do connect it that way.
So still on default screen driver and no heating problem and no flickering.