** Changed in: gnome-shell (Ubuntu Bionic)
Assignee: Jean-Baptiste Lallement (jibel) => (unassigned)
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https://bugs.launchpad.net/bugs/1748450
Title:
gnome-shell crashed with SIGTRAP in _g_log_abort() from
g_log_default_handler() from default_log_handler(message="Connection
to xwayland lost") from g_logv() from g_log() from <bug 1505409>
Status in gnome-shell package in Ubuntu:
Triaged
Status in gnome-shell source package in Bionic:
Triaged
Bug description:
[Impact]
* Xwayland is failing frequently (not crashing), which triggers a
crash in gnome-shell because gnome-shell doesn't know how to survive
after Xwayland has reset itself.
* The frequent gnome-shell crashes create frequent problem reports and
annoying dialogs for users, after they log in to an apparently working
gnome-shell.
* This affects Xorg sessions too, because the gdm login screen itself
is a Wayland session. And Xorg users will see the problem dialog after
they have logged into a Xorg session.
* The fix simply converts the crash into a silent exit (as decided by
Gnome upstream). This avoids the mountain of crash reports and
annoying error dialogs at least. It does not fix the root causes that
remain in Xwayland, but this is considered acceptable because there
really isn't a bug in gnome-shell here other than it doesn't know how
to survive without a connection to Xwayland.
* For users of Xorg sessions, like bionic default, this is a full fix
as Xorg users will never get an Xwayland instance after logging in.
And hence the Xwayland bugs are irrelevant.
[Test Case]
* Just install bionic, use it lightly and reboot a few times.
* Observe crash files are left in /var/crash and problem report
dialogs after logging in.
[Regression Potential]
Medium. The fix does not really change the structure of the existing
error handling, only changes it from a core dump into a silent exit.
For Xorg users this should be invisible as the affected login screen
restarts automatically.
[Other Info]
This is a whole class of gnome-shell crash which includes bug 1505409, bug
1748450 and bug 1556601. All three should be considered the same crash for the
sake of this SRU. Just don't mark them as duplicates of each other
because they are all still collecting duplicates of their own.
---------
*** This is a duplicate of bug 1505409, but is being kept separate so
as to automatically collect duplicate reports since the stacktrace
signature has changed recently. Any resolution and discussion should
occur in bug 1505409. ***
See also:
https://errors.ubuntu.com/problem/8ef857b2fe07d60742cd02d7d8f988f78ecd0f95
ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.26.2-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-33.36-generic 4.13.13
Uname: Linux 4.13.0-33-generic x86_64
ApportVersion: 2.20.8-0ubuntu8
Architecture: amd64
CurrentDesktop: GNOME-Greeter:GNOME
Date: Thu Feb 8 23:50:23 2018
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
GsettingsChanges:
InstallationDate: Installed on 2016-03-21 (690 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307)
ProcCmdline: /usr/bin/gnome-shell
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/false
Signal: 5
SourcePackage: gnome-shell
StacktraceTop:
() at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0
_XIOError () at /usr/lib/x86_64-linux-gnu/libX11.so.6
_XEventsQueued () at /usr/lib/x86_64-linux-gnu/libX11.so.6
XPending () at /usr/lib/x86_64-linux-gnu/libX11.so.6
() at /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
Title: gnome-shell crashed with signal 5
UpgradeStatus: Upgraded to bionic on 2018-02-08 (0 days ago)
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