[Pkg-xfce-devel] Bug#869535: Bug#869535: lightdm: service fails to start due to incorrect data dir perms

Yves-Alexis Perez corsac at debian.org
Sun Jul 30 13:19:56 UTC 2017

On Sun, 2017-07-23 at 19:46 -0700, Jonathan Lane wrote:
> The permissions on /var/lib/lightdm/data/ are root:root 755 instead of
> lightdm:lightdm 750 on install.  This breaks lightdm and renders the system
> unusable to anyone who doesn't know how to grab a shell via SSH or console
> TTY shifting.  A simple permissions change fixes it.

I'm a bit confused here, could you elaborate a little?

/var/lib/lightdm is created at postinst time with lightdm:lightdm and 0750

/var/lib/lightdm/data is created at runtime and it should be lightdm:lightdm
since it's created by a process running as lightdm user.

Also, it works just fine by default everywhere else I think, so I think you
need to be a little bit more specific so we can find what the issue is.

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