Bug#958025: gnome-shell: Wayland session never starts

[Simon McVittie]

Control: retitle -1 gnome-shell: after partial upgrade from buster, Wayland session never starts
Control: tags -1 + help

On Fri, 17 Apr 2020 at 15:48:51 +0100, Sam Morris wrote:
> ii  libgtk-3-0                    3.24.5-1
> ii  libwayland-client0            1.16.0-1
> ii  libx11-6                      2:1.6.7-1
...
> ii  libegl-mesa0 [libegl-vendor]  18.3.6-2+deb10u1
> ii  libgl1-mesa-dri               18.3.6-2+deb10u1
> ii  libglx-mesa0 [libglx-vendor]  20.0.4-2

I notice you're using the latest GNOME from testing/unstable, on a
system where many relevant packages have not been upgraded from stable.

Partial upgrades are sort-of-half-supported because they have to work
at least briefly during the upgrade from buster to bullseye, and in
principle the interdependencies between packages are meant to be tight
enough to prevent known-broken situations; but arbitrary mixtures of
packages in a stack as complex as GNOME are not something that we can
realistically test or support (the precise combination of packages on
your system probably doesn't exist anywhere else).

If there are stricter versioned Depends or versioned Breaks that would
fix this for you, I'm open to suggestions, but I don't think we have
anywhere near enough people in the GNOME team to be able to find them
all ahead of time.

    smcv