[Pkg-utopia-maintainers] Bug#982853:

[Sjoerd Simons]

On Wed, 2021-02-24 at 12:03 +0100, Michael Schaller wrote:
> I was able to reproduce the issue on vanilla Debian testing by
> purging
> the `dbus-user-session` package, which is currently blocked in our
> fleet for Reasons (TM).

Aha that explains; From debians perspective i think the best solution
is to put dbus-user-session in recommands (similar to what pulse
already has).

What you mention also means the cinnamon session (or gdm) doesn't set
the DISPLAY env var on the systemd sessions, which would likely break
anything requiring the session dbus.. 

> Reproduction instructions:
> 
> 1) Install VM via the Debian stable `mini.iso` (Debian testing was
> broken) with all the defaults except the `software to install`
> selection was completely empty, particularly no desktop environment.
>    Image source was:
> https://deb.debian.org/debian/dists/stable/main/installer-amd64/current/images/netboot/mini.iso
> 
> 2) Update to Debian testing.
>    $ sudo sed -i 's/buster/testing/g' /etc/apt/sources.list
>    $ sudo sed -i '/security/d' /etc/apt/sources.list
>    $ sudo apt update
>    $ sudo DEBIAN_FRONTEND=noninteractive apt -o
> Dpkg::Options::=--force-confnew -o Dpkg::Options::=--force-confdef
> dist-upgrade
>    $ sudo reboot
> 
> 3) Install GDM and Cinnamon
>    $ sudo apt install gdm3 cinnamon
>    $ sudo reboot
> 
> 4) Log into Cinnamon from GDM
>    Note: pipewire succeeds to start.
> 
> 5) Remove dbus-user-session
>    $ sudo apt purge dbus-user-session
>    $ sudo reboot
> 
> 6) Log into Cinnamon from GDM
>    Note: pipewire fails to start.

-- 
Sjoerd Simons <sjoerd at debian.org>