I believe I've been running into this same bug as well. I've had it
with Ubuntu 18.04 and now 20.04 both running as a VM under VirtualBox on
Windows 20.
I've been able to configure the settings such that the screen will stay
on seemingly indefinitely once logged in.
The issue occurs at the
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-settings-daemon (Ubuntu)
Status: New => Confirmed
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** Description changed:
After upgrading to 18.04, whenever I use my laptop's screen (as opposed
to an external monitor) and I'm connected to power, the screen goes dark
after ~20 seconds even though I have "Dim screen when inactive" off and
"Blank screen" set to Never.
I even tried
