Ubuntu
gdm3 package

gdm3 crashed with SIGSEGV in ensure_display_for_seat()

Bug #1945061 reported by L3P3 on 2021-09-25

This bug affects 9 people

Affects		Status	Importance	Assigned to	Milestone
	gdm	Fix Released	Unknown	auto-gitlab.gnome.org-gnome-gdm-- #739
	gdm3 (Ubuntu)	Fix Released	High	Unassigned	Ubuntu impish-updates

Bug Description

https://errors.ubuntu.com/problem/131b21d4843931d315a4548121d7d352cfd1e3a8
https://errors.ubuntu.com/problem/175aaeced63f2d1fd3c1361b9802cfff7821bd42

---

no time for handling, hope everything required in automatically attached files

ubuntu impish proposed

i5 + amd 6000 (radeon) in hp g6 notebook

switched from wayland to xorg by adjusting gdm config file

reason for editing config file: want to try out to switch gpu for ui/games

ProblemType: Crash
DistroRelease: Ubuntu 21.10
Package: gdm3 41~rc-0ubuntu1
ProcVersionSignature: Ubuntu 5.13.0-16.16-generic 5.13.13
Uname: Linux 5.13.0-16-generic x86_64
ApportVersion: 2.20.11-0ubuntu69
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Sat Sep 25 17:42:29 2021
ExecutablePath: /usr/sbin/gdm3
ProcCmdline: /usr/sbin/gdm3
ProcEnviron:
LANG=de_DE.UTF-8
PATH=(custom, no user)
SegvAnalysis:
Segfault happened at: 0x5638df1e412a: mov (%r15),%rcx
PC (0x5638df1e412a) ok
source "(%r15)" (0x00000000) not located in a known VMA region (needed readable region)!
destination "%rcx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gdm3
StacktraceTop:
?? ()
?? ()
g_closure_invoke () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
?? () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
g_signal_emit_valist () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gdm3 crashed with SIGSEGV in g_closure_invoke()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
mtime.conffile..etc.gdm3.custom.conf: 2021-09-25T17:42:14.958231
separator:

See original description

Tags:

Revision history for this message

L3P3 (l3p3) wrote on 2021-09-25:

Dependencies.txt Edit (21.3 KiB, text/plain; charset="utf-8")
Disassembly.txt Edit (689 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (92.6 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.1 KiB, text/plain; charset="utf-8")
ProcMaps.txt Edit (21.1 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (1.3 KiB, text/plain; charset="utf-8")
Registers.txt Edit (1.0 KiB, text/plain; charset="utf-8")
Stacktrace.txt Edit (3.9 KiB, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (7.8 KiB, text/plain; charset="utf-8")
modified.conffile..etc.gdm3.custom.conf.txt Edit (543 bytes, text/plain; charset="utf-8")

Revision history for this message

Apport retracing service (apport) wrote on 2021-09-25:

StacktraceTop:
ensure_display_for_seat (factory=factory@entry=0x5638e0106ab0, seat_id=0x5638e0148750 "seat0") at ../daemon/gdm-local-display-factory.c:681
on_display_status_changed (display=0x5638e00ff360, arg1=<optimized out>, factory=0x5638e0106ab0) at ../daemon/gdm-local-display-factory.c:557
g_closure_invoke (closure=0x5638e014de30, return_value=0x0, n_param_values=2, param_values=0x7ffdc5ba3720, invocation_hint=0x7ffdc5ba36a0) at ../../../gobject/gclosure.c:810
signal_emit_unlocked_R (node=node@entry=0x5638e00e7a40, detail=detail@entry=239, instance=instance@entry=0x5638e00ff360, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7ffdc5ba3720) at ../../../gobject/gsignal.c:3741
g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7ffdc5ba38f0) at ../../../gobject/gsignal.c:3497

tags:

removed: need-amd64-retrace

Revision history for this message

Apport retracing service (apport) wrote on 2021-09-27: Stacktrace.txt

Stacktrace.txt Edit (14.6 KiB, text/plain)

Revision history for this message

Apport retracing service (apport) wrote on 2021-09-27: StacktraceSource.txt

StacktraceSource.txt Edit (8.7 KiB, text/plain)

Revision history for this message

Apport retracing service (apport) wrote on 2021-09-27: ThreadStacktrace.txt

ThreadStacktrace.txt Edit (21.9 KiB, text/plain)

Changed in gdm3 (Ubuntu):
importance:	Undecided → Medium
summary:	- gdm3 crashed with SIGSEGV in g_closure_invoke() + gdm3 crashed with SIGSEGV in ensure_display_for_seat()

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2021-09-28:

Tracking in https://errors.ubuntu.com/problem/131b21d4843931d315a4548121d7d352cfd1e3a8

information type:	Private → Public
description:	updated

Revision history for this message

Launchpad Janitor (janitor) wrote on 2021-09-28:

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in gdm3 (Ubuntu):
status:	New → Confirmed

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2021-09-28:

Seems to be a regression in 41~rc-0ubuntu1

tags:

added: regression-release

Brian Murray (brian-murray) on 2021-09-28

Changed in gdm3 (Ubuntu):
milestone:	none → ubuntu-21.10

Revision history for this message

Sebastien Bacher (seb128) wrote on 2021-10-05:

#10

Reported upstream as https://gitlab.gnome.org/GNOME/gdm/-/issues/739 now

Changed in gdm3 (Ubuntu):
importance:	Medium → High
status:	Confirmed → Triaged

Brian Murray (brian-murray) on 2021-10-14

Changed in gdm3 (Ubuntu):
milestone:	ubuntu-21.10 → impish-updates

Revision history for this message

Sebastien Bacher (seb128) wrote on 2021-10-14:

#11

Upstream proposed a fix in https://gitlab.gnome.org/GNOME/gdm/-/merge_requests/160 and describe the crash as being an issue when neither wayland nor xorg is working. Could someone describe in which kind of setup they encounter the error?

Revision history for this message

L3P3 (l3p3) wrote on 2021-10-15:

#12

Well, I used the "proposed" repository. After update&upgrade a few days later, the issue was resolved.

Revision history for this message

Xosé (ubuntu-galizaweb) wrote on 2021-10-18:

#13

I log in as the primary user. Then, I try to switch users: I get to the login screen, type in the password, the screen goes black and then comes back to the login screen. I see the input field and the pointer, but the computer is frozen - I can't access a console.

If I reboot, I can log in to a different user, but if then I try to log in to the primary user, the same thing happens.

This only happens when switching between users. If I log out of the current user (end session) I can sign into the second account without any problem.

Revision history for this message

Hassan El Jacifi (waver) wrote on 2021-12-04:

#14

Hi Guys,

Is there any update in regards of this annoying bug?

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2021-12-06:

#15

The GNOME developers are working on a fix in https://gitlab.gnome.org/GNOME/gdm/-/merge_requests/160

Daniel van Vugt (vanvugt) on 2022-01-13

tags:	added: fixed-in-41.3 fixed-upstream
Changed in gdm3 (Ubuntu):
status:	Triaged → Fix Committed
description:	updated
tags:	added: jammy

Revision history for this message

Hassan El Jacifi (waver) wrote on 2022-03-02:

#16

Hi Guys,

I tested the latest gdm from jammy and the issue is still present

Package: gdm3
Version: 41.3-1ubuntu2
Status: install ok installed
Priority: optional
Section: gnome

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2022-03-03 (last edit on 2022-03-03):

#17

It looks like the fix in 41.3 is working because we have received zero crash reports since.

Hassan: If you still have problems then please open a new bug.

Changed in gdm3 (Ubuntu):
status:	Fix Committed → Fix Released

Daniel van Vugt (vanvugt) on 2022-04-05

tags:

added: rls-ii-incoming

Revision history for this message

Hassan El Jacifi (waver) wrote on 2022-04-19:

#18

Hello Daniel,

Issue is still present, as requested I opened a new bug #1969516

Bug Watch Updater (bug-watch-updater) on 2022-05-20

Changed in gdm:
status:	Unknown → Fix Released

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gdm3 crashed with SIGSEGV in ensure_display_for_seat()

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