sddm: cannot login

[worldofpeace]

Issue description

After this got merged, and is in the nixos-unstable channel, I noticed after I rebuilt my system that when sddm starts and I type in my password it just goes black and restarts sddm. Meaning that I can never reach the desktop :(

I could also not find anything useful in the journal.

cc @peterhoeg @bkchr

[peterhoeg]

In a VT, try this as root:

rm -rf /var/lib/sddm/*

[worldofpeace]

Ahh that makes perfect sense and worked @peterhoeg ✋
Is there any real way to make sure this doesn't happen for someone else?

[peterhoeg]

There was a PR some time ago that was supposed to address this (it was merged) that would simply clear out the directory on start but it looks like that didn't do the trick. I don't remember which. IMHO, the proper way to handle this is something like this:

systemd.tmpfiles.rules = [
  "e ${config.users.users.sddm.home}/.cache - - - 0"
];

[bkchr]

I also often have this problem.. @peterhoeg could you open a pull request that removes the old solution and that adds your solution?

[peterhoeg]

The commit was dae2600 - I'll PR this.