[snap] chromium stops working properly if snapd updates chromium in background

[Mike Gresens]

ubuntu 20.04

mike@workstation:~$ apt info chromium-browser
Package: chromium-browser
Version: 80.0.3987.163-0ubuntu1
Priority: optional
Section: universe/web
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 164 kB
Provides: www-browser
Pre-Depends: debconf, snapd
Depends: debconf (>= 0.5) | debconf-2.0
Homepage: https://chromium.googlesource.com/chromium/src/
Download-Size: 48,3 kB
APT-Manual-Installed: yes
APT-Sources: http://de.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
Description: Transitional package - chromium-browser -> chromium snap
 Dies ist ein Übergangspaket. Es kann gefahrlos entfernt werden.
 .
 chromium-browser is now replaced by the chromium snap.

Problem:

1) You start chromium (for me the browser is running for weeks/months).
2) Suddenly snap updates chromium (without asking before) - you get a message in gnome-shell (but you can't reset browser by click)
3) So no restart
4) Problems begin:
4)a) Close-Button, etc. disappears
4)b) red poins (app icon in dock) disappear
4)c) clicking app icon in dock does not show your chromium-windows. only "open new windows" is possible. but there are instances running...

[Olivier Tilloy (osomon)]

The notification is a stop-gap measure, it's not a perfect solution but it strongly suggests to the user that they should restart chromium themselves. See bug #1616650 for more details about this problem (I'm marking this bug a duplicate of that one).