I'm running Debian on a Raspberry Pi 5. All users log into the session LXDE-pi-labwc as confgured in lightdm.conf. I would like one user to always log into the session kodi. I've changed the XSession parameter in /var/lib/AccountsService/users/myuser but the user's effective session remains the one defined in lightdm.conf.
The kodi session is defined in /usr/share/xsessions/kodi.desktop.
LightDM is configured as follows in /etc/lightdm/lightdm.conf:
[Seat:*]
greeter-session=pi-greeter-labwc
greeter-hide-users=false
user-session=LXDE-pi-labwc
display-setup-script=/usr/share/dispsetup.sh
autologin-session=LXDE-pi-labwc
I've set the parameter XSession=kodi in /var/lib/AccountsService/users/myuser:
[User]
XSession=kodi
Icon=/home/myuser/.face
SystemAccount=false
After reboot and login, this file gets rewritten to:
[User]
Session=kodi
XSession=LXDE-pi-labwc
Icon=/home/myuser/.face
SystemAccount=false
The only way to change the effective session is to change the lightdm.conf global parameter user-session for all users, which I don't want to do.