snap 'cannot communicate with server:'

[Ugochi]

Both snap and lightdm haven't worked on my laptop for a while. Both work on my desktop without issue. The only difference I can find is that my laptop has an NVIDIA gpu while my desktop has an AMD GPU. This could account for the lightdm issues: whenever I try to use lightdm instead of gdm3, I get stuck in an infinite login loop. But it shouldn't account for the snap not functioning at all.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-advantage-tools 27.11.3~22.04.1
ProcVersionSignature: Ubuntu 5.15.0-53.59-generic 5.15.64
Uname: Linux 5.15.0-53-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: Unity:Unity7:ubuntu
Date: Wed Nov 2 17:51:30 2022
InstallationDate: Installed on 2021-02-23 (617 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-advantage-tools
UpgradeStatus: Upgraded to jammy on 2022-04-24 (192 days ago)
cloud-id.txt-error: Invalid command specified 'cloud-id'.
jobs-status.json: {"update_messaging": {"last_run": "2022-11-03T00:06:13.370368+00:00", "next_run": "2022-11-03T06:06:13.370368+00:00"}, "update_status": {"last_run": "2022-11-02T17:09:56+00:00", "next_run": "2022-11-03T05:09:56+00:00"}, "metering": {"last_run": "2022-11-03T00:06:13.370368+00:00", "next_run": "2022-11-03T04:06:13.370368+00:00"}}
livepatch-status.txt-error: Invalid command specified '/snap/bin/canonical-livepatch status'.

[Grant Orndorff (orndorffgrant)]

Thank you for reporting this bug!

It seems the behavior you're describing is related to snap and lightdm and not to ubuntu-advantage-tools. And the traceback in the ubuntu-advantage.log seems due to a snap error.

So I'm going to assign this to the snap and lightdm packages, and I'll mark it Invalid for ubuntu-advantage-tools. Feel free to change the status if you discover it is a bug in the ubuntu-advantage-tools package.

As an aside: It appears you have jammy-proposed enabled, which generally isn't recommended for normal use and may be unstable. I can tell because ubuntu-advantage-tools 27.11.3~22.04.1 is still in -proposed and hasn't been released to -updates yet.