https://bugzilla.kernel.org/show_bug.cgi?id=211425
--- Comment #15 from Andreas (icedragon.aw@web.de) --- I setup the automatic power management for the GPU/display down to 3 minutes. After the 3 minutes the desktop manager blanks the display. I pressed a key to wake up, but the monitor stays blank for the 2x20sec and I get the error message too.