codam-coding-college/codam-web-greeter

Custom LightDM greeter and lock screen theme for Codam. Requires nody-greeter or web-greeter

codam-web-greeter's Issues

Screen unlock crashes a session after a forced logout from the systemd idling script

Steps to reproduce:

1. Log in to a computer normally
2. Let it log you out after 42 minutes of inactivity without locking your screen (or with locking the screen but preventing idletime in the lock screen by pressing keys on keyboard every now and then, then logging back in when idletimer > 42 minutes)
3. Log back in normally
4. Lock screen
5. Unlock screen and the computer will log you out

Logs:
Logs indicate that this happens because the second session is started in display server :1, which is normally used by the lock screen. So when the user locks their screen in this session, the lock screen instead goes to :0, which causes the logout hook to be fired in 42 schools upon unlock due to it being the same script as the cleanup script for the greeter - and the difference here is identified by the display server's number. When this is :1, nothing happens, but when it's :0, the user's session is killed and disconnected. Which is what causes the session to crash and to return to the login screen.

Events overflow when display is being scaled on HiDPI screens

In the code there is a function that makes sure there are only as many events being displayed on screen as fit. However, HiDPI scaling from the applyHiDpiScaling function is not taken into account in this calculation, resulting in more events being rendered than can fit on-screen.