Comment 53 for bug 1748450

Sorry, this is so old that I've forgotten what it was about and the
circumstances. Also, I never understood the issues. I have since upgraded
to 18.04 and then to 18.04.1. I've also gotten out of the habit of
reporting such things. I will start reporting them again.
Jim

On Mon, Jan 7, 2019 at 8:55 PM Daniel van Vugt <
<email address hidden>> wrote:

> James,
>
> I think this bug is fixed, and we just have too many spurious bug links
> pointing here due to similar stack traces. If you can share a link to
> one of your recent crash reports it would be most helpful.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1765886).
> 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:
> Invalid
> Status in mutter package in Ubuntu:
> Fix Released
> Status in gnome-shell source package in Bionic:
> Invalid
> Status in mutter source package in Bionic:
> Fix Released
>
> 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)
> UserGroups:
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