Hi Guido, On Do 21 Sep 2023 16:05:51 CEST, Guido Berhoerster wrote:
This is actually a bug in LightDM which makes assumptions about the home directory not changing and hardcoding paths to the Xauthority file. There is also a small fix for libpam-mklocaluser necessary so it runs before the pam_systemd module so that systemd/DBus started processes have the correct home directory.
Thanks for digging this out!!!
If you want to test, you need to rebuild lightdm with the patch from https://github.com/canonical/lightdm/pull/323 and change the libpam-mklocaluser pam-config priority.
I'll need to see how we can escalate this to the lightdm maintainer in Debian. Unfortunately, neither lightdm upstream nor downstream is really active with development.
The latter is necessary for other display managers as well.
Interestingly, with GDMv3 (bullseye version), the login would just work on first attempt.
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