I upgraded xubuntu from 19.04 to 19.10 and this bug arised. If I play a movie or a video game, the screen eventually turns black. Not instantaneously, but after 90 minutes or 2 hours. This never happened before.

some lspci specs:

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
how do I solve this?