> Ugh I hate this. That patch is really not meant to affect this use-
case

It does if you are running your desktop from another container for
example (technically it's possible as I do it), but indeed it's not the
main case here.

However, we're very close to release and it's definitely better to
fallback to a behavior that is no different than what it used to be (we
always loaded images unconfined!), than presenting a black background to
people upgrading with some weird/misconfigured setup (or already
sandboxed setup).

> And I'm quite surprised to see that glycin would gladly weaken its
sandbox rather than refusing to load the image

Consider that such change happened also upstream at very last time,
likely to fixup a release, and very likely because of the very same
reason of people getting proper rendered images (other than
https://gitlab.gnome.org/Teams/Releng/AppOrganization/-/issues/35).

For sure the shell or glycin itself should notify if this is happening,
to alarm the users as mentioned in
https://gitlab.gnome.org/GNOME/glycin/-/merge_requests/295#note_2559739.

> bwrap failing would manifest in other places of the desktop, like
generating thumbnails, or the entirety of flatpak. So I'm not convinced
that this is what's happening in this bug either.

It is, I was able to reproduce this quite easily in my dev setup (that
is partially confined) and indeed I had a similar issue for few days
with a very similar trace.

---

That said, I'd be interested to know why OP bwrap does not work, and
indeed that's the root bug here.

** Bug watch added: gitlab.gnome.org/Teams/Releng/AppOrganization/-/issues #35
   https://gitlab.gnome.org/Teams/Releng/AppOrganization/-/issues/35

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https://bugs.launchpad.net/bugs/2125226

Title:
  background image is not working

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