EDIT 28 February 2023: Stable version 2023-02-21 (57) appears to have eliminated the repetitive syslog messages. (Please see all the comments under Sergio's answer.)
Here is the repaired version info:
~$ snap info snapd-desktop-integration
name: snapd-desktop-integration
summary: Desktop Integration for snapd
publisher: Canonical✓
store-url: https://snapcraft.io/snapd-desktop-integration
contact: https://github.com/snapcore/snapd-desktop-integration
license: unset
description: |
Provides a user session daemon used to provide a bridge between the user's session and snapd.
Used for things like automatic theme installation.
services:
snapd-desktop-integration: simple, enabled, inactive
snap-id: IrwRHakqtzhFRHJOOPxKVPU0Kk7Erhcu
tracking: latest/stable
refresh-date: today at 15:17 PST
channels:
latest/stable: 0.1 2023-02-21 (57) 438kB -
latest/candidate: 0.1 2023-02-23 (59) 442kB -
latest/beta: ↑
latest/edge: 0.1 2023-02-23 (59) 442kB -
installed: 0.1 (57) 438kB -`
EDIT 21 January 2023: candidate version 57 produces these repetitive syslog messages when we installed it after ssh'ing to a test system:
21 10:11:52 10:11:52 ZT1 kern.5 kernel: [261316.069573] audit: type=1107 audit(1674324712.162:358): pid=830 uid=106 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/login1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.3" pid=1145400 label="snap.snapd-desktop-integration.snapd-desktop-integration" peer_pid=881 peer_label="unconfined"
21 10:11:52 10:11:52 ZT1 kern.5 kernel: [261316.069573] exe="/usr/bin/dbus-daemon" sauid=106 hostname=? addr=? terminal=?'
21 10:11:52 10:11:52 ZT1 kern.5 kernel: [261316.069831] audit: type=1107 audit(1674324712.162:359): pid=830 uid=106 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/login1" interface="org.freedesktop.login1.Manager" member="ListSessions" mask="send" name=":1.3" pid=1145400 label="snap.snapd-desktop-integration.snapd-desktop-integration" peer_pid=881 peer_label="unconfined"
21 10:11:52 10:11:52 ZT1 kern.5 kernel: [261316.069831] exe="/usr/bin/dbus-daemon" sauid=106 hostname=? addr=? terminal=?'
21 10:11:54 10:11:54 ZT1 user.5 snapd-desktop-i[1145502]: Failed to do gtk init. Waiting for a new session with desktop capabilities.
21 10:11:54 10:11:54 ZT1 kern.5 kernel: [261318.318431] audit: type=1326 audit(1674324714.410:360): auid=1001 uid=1001 gid=1001 ses=152 subj=snap.snapd-desktop-integration.snapd-desktop-integration pid=1145502 comm="snapd-desktop-i" exe="/snap/snapd-desktop-integration/57/usr/bin/snapd-desktop-integration" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7fb4631a6a3d code=0x50000
21 10:11:54 10:11:54 ZT1 user.5 snapd-desktop-i[1145502]: Failed to get session list (check that login-session-observe interface is connected). Forcing a reload.
21 10:11:54 10:11:54 ZT1 kern.5 kernel: [261318.321048] audit: type=1107 audit(1674324714.410:361): pid=830 uid=106 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/login1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.3" pid=1145502 label="snap.snapd-desktop-integration.snapd-desktop-integration" peer_pid=881 peer_label="unconfined"
21 10:11:54 10:11:54 ZT1 kern.5 kernel: [261318.321048] exe="/usr/bin/dbus-daemon" sauid=106 hostname=? addr=? terminal=?'
21 10:11:54 10:11:54 ZT1 user.5 snapd-desktop-i[1145502]: Loop exited. Forcing reload.
EDIT 3 January 2023: if you are testing candidate version 55 you can stop the repetitive messages by running:
sudo snap connect snapd-desktop-integration:login-session-observe
Please see Sergio's comment below. The goal is to eliminate the need for this step and make it autoconnect.
EDIT 17 December 2022: we tested candidate version 55 on two machines to which we were ssh'd. It fixed the atk-bridge messages, but caused a different set of messages every few seconds:
17 10:42:52 10:42:52 PATG user.5 snapd-desktop-i[53867]: Failed to get session list (check that login-session-observe interface is connected). Forcing a reload.
17 10:42:52 10:42:52 PATG user.5 snapd-desktop-i[53867]: Loop exited. Forcing reload.
17 10:42:52 10:42:52 PATG kern.5 kernel: [246586.108424] audit: type=1107 audit(1671302572.982:370): pid=1182 uid=102 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/login1" interface="org.freedesktop.DBus.Properties" memb er="GetAll" mask="send" name=":1.11" pid=53867 label="snap.snapd-desktop-integration.snapd-desktop-integration" peer_pid=1280 peer_label="unconfined"
17 10:42:52 10:42:52 PATG kern.5 kernel: [246586.108424] exe="/usr/bin/dbus-daemon" sauid=102 hostname=? addr=? terminal=?'
17 10:42:52 10:42:52 PATG kern.5 kernel: [246586.108847] audit: type=1107 audit(1671302572.982:371): pid=1182 uid=102 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/login1" interface="org.freedesktop.login1.Manager" membe r="ListSessions" mask="send" name=":1.11" pid=53867 label="snap.snapd-desktop-integration.snapd-desktop-integration" peer_pid=1280 peer_label="unconfined"
17 10:42:52 10:42:52 PATG kern.5 kernel: [246586.108847] exe="/usr/bin/dbus-daemon" sauid=102 hostname=? addr=? terminal=?'
17 10:42:55 10:42:55 PATG user.5 snapd-desktop-i[53945]: Failed to do gtk init. Waiting for a new session with desktop capabilities.
17 10:42:55 10:42:55 PATG kern.5 kernel: [246588.351735] audit: type=1326 audit(1671302575.223:372): auid=1000 uid=1000 gid=1000 ses=10 subj=snap.snapd-desktop-integration.snapd-desktop-integration pid=53945 comm="snapd-desktop-i" exe="/snap/snapd-desktop-integration/55/usr/bin/snapd-desktop-integration" sig= 0 arch=c000003e syscall=314 compat=0 ip=0x7f0aba0cda3d code=0x50000
17 10:42:55 10:42:55 PATG kern.5 kernel: [246588.355602] audit: type=1107 audit(1671302575.227:373): pid=1182 uid=102 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/login1" interface="org.freedesktop.DBus.Properties" memb er="GetAll" mask="send" name=":1.11" pid=53945 label="snap.snapd-desktop-integration.snapd-desktop-integration" peer_pid=1280 peer_label="unconfined"
17 10:42:55 10:42:55 PATG kern.5 kernel: [246588.355602] exe="/usr/bin/dbus-daemon" sauid=102 hostname=? addr=? terminal=?'
The sequence repeated every few seconds until we uninstalled the package. (Both machines had users logged into to graphical sessions at the time we did the test, if that matters.)
EDIT 12 December 2022: candidate version 49 did not fix the repetitive "atk-bridge" messages that occur when you ssh to a machine that has snapd-desktop-integration installed, though it may fix the messages from the GDM session:
https://github.com/snapcore/snapd-desktop-integration/pull/41#issuecomment-1344603344
EDIT 9 December 2022: Here is the result of testing candidate version 49:
https://github.com/snapcore/snapd-desktop-integration/pull/41#issuecomment-1344589269
EDIT 7 December 2022: Here is the commit:
https://github.com/sergio-costas/snapd-desktop-integration/commit/a5652377cc5c8f20ea311a0dd28d44a63c4551c2
EDIT 6 December 2022: Here is the pull request:
https://github.com/snapcore/snapd-desktop-integration/pull/41
The recommendation per the package authors is:
...follow the pull request, when that gets merged it will be published to the candidate channel within a couple of hours automatically.
They also add:
It's a rather complicated fix, that is a bit risky so it will take a couple days to get properly reviewed. But once it's thoroughly reviewed, we'll get going in the testing process right away.
EDIT 4 December 2022: I emailed one of the package authors. They have someone working on the issue and are hopeful they'll have a fix this week.
====
The problem must have been caused by a faulty snap upgrade sometime around 29 November 2022.
Unfortunately the information in snap changes is already overwritten.
The repetitive messages stopped on all of our machines at about 2100 GMT on 2 December 2022 but they restarted again today (3 December).
We noticed that the "atk-bridge...please try to not load it" messages start again as soon as we ssh to any of the machines.
We used htop in user tree view to kill off tasks until we could see that it was "systemd --user" repeatedly launching atk-bridge. If we kill that systemd task, atk-bridge stops respawning and the atk-bridge syslog messages stop (but not the other ones).
In the meantime, we applied Dan Christensen's bypass (which also gets rid of the atk-bridge messages) so no need to kill off any tasks after ssh'ing.
