LightDM launches different session than default session

Help
1

When I start up my computer into NixOS, and log in from the greeter (lightdm-mini-greeter), nothing happens. At first I thought that my password got changed or messed up somehow, but I was able to log into a tty. After looking at the logs, it seems the session somehow got loaded as ‘xterm+xmonad’ (I used xmonad a while ago), even though my current defaultSession is ‘none+i3’. I’m running on nixos-unstable and also using home-manager.
Here are the relevant (I hope) files:
/etc/nixos/configuration.nix:

IMG_20200506_162951
IMG_20200506_1629512304×1728 1.27 MB

/var/log/lightdm/lightdm.log:
IMG_20200506_162757
IMG_20200506_1627572304×1728 1.65 MB

/home/kfish/.xsession:
IMG_20200506_162829
IMG_20200506_1628292304×1728 1.22 MB

Any ideas as to why?

2

Have you checked the session selector of your greeter if it perhaps points to the wrong session?

Also check if you have perhaps a ~/.xsession which might overwrite anything…

3

Did you manage to resolve this? I’m having kind of the same issue where lightdm-mini-greeter is trying to launch a ‘default’ session but there is none. lightdm-gtk-greeter does launch the correct none+bspwm session though.