Public bug reported:
That one is really odd.
25.04 was working perfectly - and then I upgraded the (expendable)
machine to beta test 25.10 and ... the graphical login won't work at
all.
gdm will start, but I see no graphical activity AT ALL. No flickering,
nothing.
The only log line which might be of interest is:
gdm-launch-environment] [3328]: pam_unix(gdm-launch-
environment:account): could not identify user (from getpwname(gdm-
greeter))
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: gdm3 49~rc-0ubuntu2
ProcVersionSignature: Ubuntu 6.17.0-4.4-generic 6.17.0-rc5
Uname: Linux 6.17.0-4-generic x86_64
ApportVersion: 2.33.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Mon Sep 22 15:14:57 2025
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=linux
SourcePackage: gdm3
UpgradeStatus: Upgraded to questing on 2025-09-18 (4 days ago)
** Affects: gdm3 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug questing third-party-packages
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https://bugs.launchpad.net/bugs/2125403
Title:
Graphics mode won't be started from gdm3
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