Hi all, found the bug. Was apparmor after all. For some reason didn't
show up in journalctl until I tried the beta, and then found the
culprit: thunderbird is trying to bind to a session called
org.mozilla.thunderbird plus some identifiers, not sure what they
correspond to. However, adding the following to the apparmor profile
fixed the bug:
dbus bind
bus=session
name=org.mozilla.thunderbird*,
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Packages, which is subscribed to thunderbird in Ubuntu.
https://bugs.launchpad.net/bugs/1980839
Title:
thunderbird -compose returns error since the 102 snap update?
Status in thunderbird package in Ubuntu:
Confirmed
Bug description:
After updating to the latest thunderbird 102.0.1 snap on Ubuntu 20.04,
it is no longer possible to open mailto links from the firefox snap in
thunderbird. When clicking a mailto link in the firefox 102.0.1 snap,
thunderbird returns the following error message: "Thunderbird is
already running, but is not responding. To use Thunderbird, you must
first close the existing Thunderbird process, restart your device, or
use a different profile." The issue appears related to the thunderbird
update as there was no issue opening links in the previous 91 version.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1980839/+subscriptions
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