Code review comment for lp://qastaging/~darkxst/ubuntu-release-upgrader/gnome-session-inhibit

That was my patch and I would have included an inhibitor on idle if it worked like that.

Atleast on GNOME (although its likely the same on KDE), the logind "idle" inhibitors do not inhibit the idle monitors within the compositor. logind only deals with system level events/actions like shutdown/sleep, power buttons and lid switch, it has no concept of what his happening within the users session. Its the compositor that is monitoring user input (keyboard/mouse etc) and deciding when to activate the screensaver and screenblanking.

So we still need to install an "idle" inhibitor into the users session.