Comment 74 for bug 1798961

How to reproduce?

I am now running 18.04 LTS, problem is there since 16.04 LTS.

I have noticed if I disable my displays from going into power-safe mode and still let ubuntu go into the lock screen I could keep the machine running. I also disable the "No signal power off" feature on my displays. This is not something you want on the long run, but since I combine my desktop with a server running several virtual machines, I need to machine to stay on.

When I get to my desktop, after not using it for a while, and I press CTRL - SHIFT, Ubuntu will wakeup and show the lock screen, I can then login - I never have a crash again. But when I move the mouse first I sometimes still get the crash. I have tested this for a couple of weeks, making sure my mouse never moves when I touch the keyboard. Even bumping the table could cause the mouse to send some signals and crash the desktop.

Important: I sometimes move the mouse first and does not crash, but never when I press CTRL - SHIFT first.

I have a suspicion that there is an issue when Ubuntu wake up and peripherals are doing stuff.