Public bug reported:
Note, I have kde and gnome installed. Previously I was using lightdm,
but since this was removed with the upgrade, I chose to use gdm. When
booting, gdm did not start but instead I was at a shell login prompt. No
errors were present in syslog or dmesg. dmesg output is attached.
I could start the x server by executing `startx` from the CLI. I then
issued a `dpkg-reconfigure sddm` and selected sddm, then `dpkg-
reconfigure gdm` and selected gdm. It gave me some sort of error about
invoke-rc.d, so I then did `invoke-rc.d gdm3 start`, and it started gdm
fine without rebooting. Then on next reboot as well, gdm started. So I'm
not sure what there actually caused it to work.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gdm3 3.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: KDE
Date: Thu May 3 15:46:12 2018
InstallationDate: Installed on 2017-10-06 (209 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: gdm3
UpgradeStatus: Upgraded to bionic on 2018-05-03 (0 days ago)
** Affects: gdm3 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
** Attachment added: "dmesg output"
https://bugs.launchpad.net/bugs/1768993/+attachment/5133295/+files/dmesg
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https://bugs.launchpad.net/bugs/1768993
Title:
Upgrade from 17.10 to 18.04 does not start gdm3 on boot
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