Ubuntu 21.10 - Raspbery Pi 4 (4G) desktop locks after boot

[Doug Baden]

I updated 20.40 to 21.10 this morning.
I added the linux-modules-extra-raspi so I can start docker, which needs the veth module.

Now the desktop freezes. Attempted a full reboot - no changes.
I ssh'ed into the system and docker is running all restarted modules (Prometheus, Grafana and AlertManager).

I tried a sudo service gdm3 restart and watched gnome restart. It freezes after a few minutes.
Tried the restart again and same symptoms.

lsb_release -rd
Description: Ubuntu 21.10
Release: 21.10

apt-cache policy gdm3
gdm3:
  Installed: 41~rc-0ubuntu2
  Candidate: 41~rc-0ubuntu2
  Version table:
 *** 41~rc-0ubuntu2 500
        500 http://ports.ubuntu.com/ubuntu-ports impish/main arm64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: gdm3 41~rc-0ubuntu2
ProcVersionSignature: Ubuntu 5.13.0-1008.9-raspi 5.13.14
Uname: Linux 5.13.0-1008-raspi aarch64
ApportVersion: 2.20.11-0ubuntu70
Architecture: arm64
CasperMD5CheckResult: unknown
Date: Mon Oct 18 16:25:57 2021
ImageMediaBuild: 20201022
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: Upgraded to impish on 2021-10-18 (0 days ago)
mtime.conffile..etc.gdm3.custom.conf: 2021-03-19T12:23:23.841423

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1946368, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.