This problem is going on for several months.
When you try to run a GUI program it suddenly exits the session gets back to the login screen where I get this notification (bubble for several seconds) at the top of screen:
Automatic suspend. Computer will be suspend very soon due to inactivity.
I've disabled automatic suspend in the power settings.
When returning from hibernation and again trying to run a GUI program the exit symptom is a strange string of "@^"s in top left of the brownish pre-login screen , then the PC becomes unresponsive (no tty's whatsoever) and the only way of closing it is hard reset
My machine is an HP Spectre x360 with dual-boot (with Windows 10 using GRUB) I use communitheme on GNOME shell v3.28.2
It doesn't happen immediately or when running a specific program, so I cannot "produce" this error at will. I can run 10 or more programs for an hour or so until it strikes.
Where should I start to debugging this problem ?
Help is much needed here