Public bug reported:
I've been running Ubuntu 20.04 LTS on some servers for a while. This
week, they started going non-responsive. Plugging in monitors and
keyboards to them, I found they had gone to sleep, and waking them up
showed the purple gdm login screen. Before, they've always just had my
good friend getty showing a black and white "login: " prompt.
Watching their behaviour for about an hour, I found the suspends were
happening at 20 minute intervals, which is gdm's default sleep timer, so
I'm reasonably confident my downtime problem was because gdm had self-
activated unexpectedly.
I checked my logs and found that unattended-upgrades had installed a new
version overnight. I'd never noticed I even had gdm3 installed because
it was never active before, and I'm still working out why that is, and
I've disabled and purged it, but regardless I am surprised that the
upgrade self-activated it like that without my consent.
I would like to ask that gdm3's configure script takes account of the
current `service enable`/`service disable`/`systemctl enable`/`systemctl
disable` state, if it's not already doing that. Or, just don't touch
`service` at all during an upgrade. During an install is fine, but
please not during an upgrade.
Here's version details from the two servers I've seen this on so far:
root@romane:~# lsb_release -rd
Description: Ubuntu 20.04.3 LTS
Release: 20.04
root@romane:~# apt-cache policy gdm3
gdm3:
Installed: (none)
Candidate: 3.36.3-0ubuntu0.20.04.4
Version table:
3.36.3-0ubuntu0.20.04.4 500
500 http://ca.archive.ubuntu.com/ubuntu focal-updates/main amd64
Packages
3.36.3-0ubuntu0.20.04.2 500
500 http://ca.archive.ubuntu.com/ubuntu focal-security/main amd64
Packages
3.34.1-1ubuntu1 500
500 http://ca.archive.ubuntu.com/ubuntu focal/main amd64 Packages
root@rosenberg:~# lsb_release -rd
Description: Ubuntu 20.04.3 LTS
Release: 20.04
root@rosenberg:~# apt-cache policy gdm3
gdm3:
Installed: 3.36.3-0ubuntu0.20.04.4
Candidate: 3.36.3-0ubuntu0.20.04.4
Version table:
*** 3.36.3-0ubuntu0.20.04.4 500
500 http://ca.archive.ubuntu.com/ubuntu focal-updates/main amd64
Packages
100 /var/lib/dpkg/status
3.36.3-0ubuntu0.20.04.2 500
500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
3.34.1-1ubuntu1 500
500 http://ca.archive.ubuntu.com/ubuntu focal/main amd64 Packages
Here's the relevant upgrade logs from the two:
root@romane:~# grep 2022-02-10 /var/log/dpkg.log | grep gdm3
2022-02-10 06:22:56 install gdm3:amd64 3.36.3-0ubuntu0.20.04.3
3.36.3-0ubuntu0.20.04.4
2022-02-10 06:22:56 status half-installed gdm3:amd64 3.36.3-0ubuntu0.20.04.3
2022-02-10 06:22:56 status unpacked gdm3:amd64 3.36.3-0ubuntu0.20.04.4
2022-02-10 06:25:01 configure gdm3:amd64 3.36.3-0ubuntu0.20.04.4 <none>
2022-02-10 06:25:01 status unpacked gdm3:amd64 3.36.3-0ubuntu0.20.04.4
2022-02-10 06:25:01 status half-configured gdm3:amd64 3.36.3-0ubuntu0.20.04.4
2022-02-10 06:25:02 status installed gdm3:amd64 3.36.3-0ubuntu0.20.04.4
root@rosenberg:~# grep 2022-02-13 /var/log/dpkg.log | grep gdm3
2022-02-13 06:08:05 install gdm3:amd64 <none> 3.36.3-0ubuntu0.20.04.4
2022-02-13 06:08:05 status half-installed gdm3:amd64 3.36.3-0ubuntu0.20.04.4
2022-02-13 06:08:06 status unpacked gdm3:amd64 3.36.3-0ubuntu0.20.04.4
2022-02-13 06:11:52 configure gdm3:amd64 3.36.3-0ubuntu0.20.04.4 <none>
2022-02-13 06:11:52 status unpacked gdm3:amd64 3.36.3-0ubuntu0.20.04.4
2022-02-13 06:11:52 status half-configured gdm3:amd64 3.36.3-0ubuntu0.20.04.4
2022-02-13 06:11:53 status installed gdm3:amd64 3.36.3-0ubuntu0.20.04.4
** Affects: gdm3 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1960857
Title:
gdm3 self-enables during upgrade
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