gdm3 crashed with SIGSEGV in gdm_settings_get_value from get_value from gdm_settings_direct_get_boolean from gdm_local_display_factory_sync_seats

[Wayne Bell]

Ubuntu Artful Aardvark (development branch)
Release: 17.10
gdm3:
  Installed: 3.24.2-1ubuntu2
  Candidate: 3.24.2-1ubuntu2
  Version table:
 *** 3.24.2-1ubuntu2 500

I was having issues with pre-alpha 17.10 and nvidia proprietary drivers, 4.0.10-22 kernel, and gdm3 which I finally sorted out, but wanted to test the newest kernels and the newest nvidia drivers.

so, I switched video drivers to nouveau to start with(hoping for best compatibility with gdm3 and newer kernels) and updated to kernel 4.11.6... then after an apt-get update and autoremove, I noticed, but ignored an error and updated to kernel 4.12 rc5 to test.

upon reboot again, no issues other than this error message. Thought I'd report it in case it's useful, but doesn't seem to be causing any issues w/ my system... yet.

system boots normally and gdm greeter appears to work as usual... Cinnamon Desktop doesn't have any issues and Google Chrome seems fine. Just throws an error upon login and Cinnamon Desktop startup.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: gdm3 3.24.2-1ubuntu2
Uname: Linux 4.10.0-20-generic x86_64
ApportVersion: 2.20.5-0ubuntu5
Architecture: amd64
Date: Tue Jun 20 00:06:27 2017
ExecutablePath: /usr/sbin/gdm3
InstallationDate: Installed on 2017-02-20 (121 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
ProcCmdline: /usr/sbin/gdm3
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
Signal: 11
SourcePackage: gdm3
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Title: gdm3 crashed with SIGSEGV
UpgradeStatus: Upgraded to artful on 2017-05-08 (43 days ago)
UserGroups:

[Wayne Bell (kingramze)]

I just noticed the error log submitted shows Linux 4.10.0-20-generic x86_64... so, not sure if this is related, but when trying to update from 4.10.0-20 to 4.10.0-22, gdm3 would NOT load with the newer kernel or even 4.11.6 kernel with the latest nvidia drivers... but, after an update, 4.10.0-22 magically worked with the nvidia drivers. So, perhaps this error is from that crash.

If so, then the issue has resolved itself.

[Apport retracing service (apport)]

StacktraceTop:
 gdm_settings_get_value (settings=0x55dd147c3010, key=key@entry=0x55dd128ff432 "daemon/WaylandEnable", value=value@entry=0x7ffdc764a8c0, error=error@entry=0x7ffdc764a8b8) at gdm-settings.c:84
 get_value (key=key@entry=0x55dd128ff432 "daemon/WaylandEnable", value=value@entry=0x7ffdc764a8e0) at gdm-settings-direct.c:76
 gdm_settings_direct_get_boolean (key=key@entry=0x55dd128ff432 "daemon/WaylandEnable", value=value@entry=0x7ffdc764a92c) at gdm-settings-direct.c:163
 gdm_local_display_factory_sync_seats (factory=factory@entry=0x55dd147db6f0) at gdm-local-display-factory.c:452
 on_display_status_changed (display=0x55dd147d3640, arg1=<optimized out>, factory=0x55dd147db6f0) at gdm-local-display-factory.c:292

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 17.10 (artful) reached end-of-life on July 19, 2018.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.

[Launchpad Janitor (janitor)]

[Expired for gdm3 (Ubuntu) because there has been no activity for 60 days.]