Re: [Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[John Stevens]

 Awesome dude.

On Wed, Aug 8, 2018, 12:21 AM Daniel van Vugt 
wrote:

> Fix Released. Zero reports of this crash in gnome-shell 3.28 and later.
>
> ** Tags added: bionic
>
> ** Changed in: gnome-shell (Ubuntu)
>Status: Confirmed => Fix Released
>
> ** Changed in: ubuntu-gnome
>Status: Confirmed => Fix Released
>
> ** Changed in: mutter (Ubuntu Artful)
>Status: Confirmed => Won't Fix
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1744815).
> https://bugs.launchpad.net/bugs/1505409
>
> Title:
>   gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
>   _XEventsQueued() from XPending() from gdk_check_xpending()
>   ["Connection to xwayland lost"]
>
> Status in GNOME Shell:
>   Confirmed
> Status in Ubuntu GNOME:
>   Fix Released
> Status in gnome-shell package in Ubuntu:
>   Fix Released
> Status in mutter package in Ubuntu:
>   Fix Released
> Status in mutter source package in Artful:
>   Won't Fix
>
> Bug description:
>
> https://errors.ubuntu.com/problem/d0252e2b465152efea2511e72f1e31681e2b2742
>
>   ---
>
>   Occurred during start-up, before I did anything special...
>
>   1 Ubuntu Wily Werewolf (development branch) 15.10
>   2 3.16.3-1ubuntu6
>   3&4 not applicable
>
>   ProblemType: Crash
>   DistroRelease: Ubuntu 15.10
>   Package: gnome-shell 3.16.3-1ubuntu6
>   ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
>   Uname: Linux 4.2.0-16-generic x86_64
>   NonfreeKernelModules: wl
>   ApportVersion: 2.19.1-0ubuntu2
>   Architecture: amd64
>   CurrentDesktop: GNOME
>   Date: Mon Oct 12 19:22:07 2015
>   DisplayManager: gdm
>   ExecutablePath: /usr/bin/gnome-shell
>   GsettingsChanges:
>
>   InstallationDate: Installed on 2015-10-08 (4 days ago)
>   InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64
> (20150924)
>   ProcCmdline: gnome-shell --mode=gdm --wayland --display-server
>   ProcEnviron:
>SHELL=/bin/false
>PATH=(custom, no user)
>XDG_RUNTIME_DIR=
>LANG=nl_NL.UTF-8
>   Signal: 5
>   SourcePackage: gnome-shell
>   StacktraceTop:
>?? () from /usr/lib/libmutter.so.0
>_XIOError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
>_XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6
>XPending () from /usr/lib/x86_64-linux-gnu/libX11.so.6
>?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
>   Title: gnome-shell crashed with signal 5 in _XIOError()
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   UserGroups:
>
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>

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Fix Released. Zero reports of this crash in gnome-shell 3.28 and later.

** Tags added: bionic

** Changed in: gnome-shell (Ubuntu)
   Status: Confirmed => Fix Released

** Changed in: ubuntu-gnome
   Status: Confirmed => Fix Released

** Changed in: mutter (Ubuntu Artful)
   Status: Confirmed => Won't Fix

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

This crash is now fixed in Ubuntu 18.04. But I'll leave the gnome-shell
task open for a while to help people and bots find the bug more easily.

** No longer affects: gdm3 (Ubuntu Artful)

** No longer affects: gdm3 (Ubuntu)

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

** No longer affects: gnome-shell (Ubuntu Artful)

** Also affects: gnome-shell (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: gnome-shell (Ubuntu)
   Status: New => Confirmed

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

** No longer affects: gnome-shell (Ubuntu)

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

mutter (3.28.1-1ubuntu1) bionic; urgency=medium

  * Add xwayland-use-g_autoptr-for-GError-in-xserver_died.patch,
xwayland-Don-t-abort-if-Xwayland-crashes.patch:
- Cherry picked from upstream, to reduce noise of mutter on crashes
  which are actually caused by XWayland (LP: #1748450)

 -- Marco Trevisan (Treviño)   Mon, 23 Apr 2018
10:46:57 -0500

** Changed in: mutter (Ubuntu)
   Status: Confirmed => Fix Released

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

^^^
I feel conflicted about letting gnome-shell just exit. It will result in some 
people logging bug reports that we can't diagnose, but those will be orders of 
magnitude fewer than what we see now.

So short term for 18.04, it's a good idea. Slightly beyond that, it's
going to keep hurting us if nobody fixes Xwayland.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

It looks like upstream has a "fix" coming:

https://gitlab.gnome.org/GNOME/mutter/commit/2d80fd02e76bbe17dc52072299dda92ab88c99c0

Although that will just stop the crash reports from occurring and not
fix the root cause. That may be all we need for now...

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Actually (a) might be explained if Xwayland is restarting itself on some
X error. But in Xorg terms it can restart the server anew without
exiting. So gnome-shell would see this as a crash while the Xwayland
process stays running.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Update: Now we've had the fix for bug 1746874 released in 18.04 for a
couple of weeks we should be able to see some correlation between gnome-
shell and Xwayland crashes, if there's any at all.

But we don't see any correlation. In the past week, Ubuntu 18.04 has hit
this gnome-shell crash 5967 times (via bug 1748450) and Xwayland's top
crash has only happened 60 times over the same period.

So now we really have to assume that either:
 (a) Xwayland is not crashing at all and gnome-shell is mistaking some 
transient error for a crash; or
 (b) Xwayland is crashing/exiting and failing to dump core, failing to leave a 
crash file.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Now tracking duplicates in bug 1748450 instead.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

I have now reopened bug 1732878. So hopefully the bots will find that
one and I won't have to deduplicate them by hand any more.

Bug 1732878 is still really a duplicate of this one for the sake of
fixes. Just that the stacktrace changed slightly in 18.04's
3.26.2-0ubuntu1.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Bug 1746653 (private) mentions that Xwayland is dumping core (just
"core") in $HOME. That might explain this bug if the same is happening
for a lot of people... we wouldn't get the crash reports we need.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

I think we might need to split this bug in two, just for the sake of
automation.

In 18.04 the stack trace for this crash is a bit different. So our
robots don't notice it's the same bug as this. It might pay to un-
duplicate one of the newer forms, just so the robots can find it and
will stop logging duplicates. And comment in that bug that it's the same
as this one.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Happy 2018.

Now we've got Xwayland leaving core files when it crashes (fixed in
mutter 3.26.2), we still see very few Xwayland crashes. Too few to
account for most (90%+) of the instances of this bug...

 https://errors.ubuntu.com/?package=xwayland=month
 https://errors.ubuntu.com/?package=gnome-shell=month

So the most likely explanation I can think of now is that Xwayland is
exiting prematurely, in some way that looks like an unexpected crash to
its parent (mutter code in the gnome-shell process). We'll need to look
for possible ways Xwayland might exit prematurely without dumping
core...

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Cico Zhang]

The same problem, wayland crashed.

Dec 16 09:41:56 cico-XPS-13-9360 gnome-shell[906]: Failed to apply DRM plane 
transform 0: Permission denied
Dec 16 09:41:57 cico-XPS-13-9360 org.gnome.Shell.desktop[906]: (EE)
Dec 16 09:41:57 cico-XPS-13-9360 org.gnome.Shell.desktop[906]: Fatal server 
error:
Dec 16 09:41:57 cico-XPS-13-9360 org.gnome.Shell.desktop[906]: (EE) wl_drm@4: 
error 0: authenicate failed
Dec 16 09:41:57 cico-XPS-13-9360 org.gnome.Shell.desktop[906]: (EE)
Dec 16 09:41:57 cico-XPS-13-9360 gnome-shell[906]: X Wayland crashed; aborting
Dec 16 09:41:58 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/shell/ui/main.js 315]: reference to undefined property 
"MetaStage"
Dec 16 09:41:58 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/shell/ui/layout.js 221]: reference to undefined property 
"MetaWindowGroup"
Dec 16 09:41:58 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/shell/ui/osdMonitorLabeler.js 59]: reference to 
undefined property "MetaDBusDisplayConfig
Dec 16 09:41:59 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/shell/ui/slider.js 38]: reference to undefined property 
"CallyActor"
Dec 16 09:41:59 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/gjs/modules/tweener/tweener.js 540]: reference to 
undefined property "isSpecialProperty"
Dec 16 09:41:59 cico-XPS-13-9360 gnome-shell[1039]: Error looking up 
permission: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name 
org.freedesktop.impl.portal.Per
Dec 16 09:41:59 cico-XPS-13-9360 org.gnome.Shell.desktop[1039]: Window manager 
warning: "XF86RFKill" is not a valid accelerator
Dec 16 09:42:00 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/shell/ui/layout.js 29]: reference to undefined property 
"MetaWindowX11"
Dec 16 09:43:18 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/shell/gdm/realmd.js 130]: reference to undefined 
property "_loginFormat"
Dec 16 09:43:18 cico-XPS-13-9360 gnome-shell[1039]: JS WARNING: 
[resource:///org/gnome/shell/gdm/realmd.js 142]: reference to undefined 
property "_loginFormat"

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Nicolás Abel Carbone]

Alright, done. It is bug #1731484.
Neither ubuntu-bug nor apport-cli worked, but crashed when trying to submit the 
.crash file. So, I attached it manually.
Thanks!

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Nicolás,

Yes please. In particular please try to report crashes using the crash files 
left in /var/crash/ using this command:
  ubuntu-bug /var/crash/YOURFILE.crash
or if that fails then:
  apport-cli /var/crash/YOURFILE.crash

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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Re: [Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Nicolás Abel Carbone]

Ok, Daniel, I understand. Should I file a specific bug about the
notification-related crash? There are a lot of bug reports with gnome-shell
crashes and some of them are probably related to the notifications, but i
don't know how to figure out which one is the one I am having.

El jue., 9 de nov. de 2017 a la(s) 06:55, Rachel Greenham <
1505...@bugs.launchpad.net> escribió:

> It failed to hold true on day 2 anyway, as today the session didn't
> survive the overnight sleep. But in any case I re-checked the bug of
> mine that was marked a duplicate of this one, and saw as it was during
> one of my brief try-outs with wayland, is irrelevant to my current
> gnome-session woes, as I'm back on xorg. I had thought this just one of
> the family of gnome-shell crashers that was affecting both xorg and
> wayland, but seemingly only with displayport monitors.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1711383).
> https://bugs.launchpad.net/bugs/1505409
>
> Title:
>   gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
>   _XEventsQueued() from XPending() from gdk_check_xpending()
>   ["Connection to xwayland lost"]
>
> To manage notifications about this bug go to:
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nicocarb...@gmail.com
ncarb...@exa.unicen.edu.ar

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Rachel Greenham]

It failed to hold true on day 2 anyway, as today the session didn't
survive the overnight sleep. But in any case I re-checked the bug of
mine that was marked a duplicate of this one, and saw as it was during
one of my brief try-outs with wayland, is irrelevant to my current
gnome-session woes, as I'm back on xorg. I had thought this just one of
the family of gnome-shell crashers that was affecting both xorg and
wayland, but seemingly only with displayport monitors.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

This bug is a catch-all bug. If Xwayland crashes for any reason it will
trigger gnome-shell death either in this bug or as bug 1556601.

While we appreciate everyone's efforts in diagnosing problems, in this
particular case the issue is already understood and doesn't need much
more comment.

We can and will try to reduce the number of Xwayland crashes triggering
this, which should be dealt as separate bugs. And separately, ideally,
mutter/gnome-shell should not commit suicide when Xwayland crashes. The
Gnome guys are already aware of this problem and say they would like to
break this dependency in a future version of mutter/gnome-shell. That
way even if Xwayland does crash it won't bring gnome-shell down with it.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Rachel Greenham]

Interesting

For what it's worth: On seeing #44 I tried turning off notification
popups and lock screen notifications and left it overnight. On waking I
had the usual problems I often (not always) have with my monitors
persuading them to wake up (one of them is a model with a known issue
with waking up: early-revision Dell P2715Q), but once I'd fought through
that (multiple monitor power-cycles) I still had the gnome session that
I had left on screen the previous evening. The first time *that's*
happened on more than a very short screen lock period since... since I
installed the Artful alpha I think.

One possible minor glitch, though probably not part of this bug: When
the monitors did eventually admit there was a signal coming from the
computer, I briefly saw the logged in gnome desktop before it was
replaced by the lock screen. Is that supposed to happen?

This is on Gnome Xorg session, on nVidia 387.22 (GTX960), gnome-shell
3.26.1-0ubuntu5, mutter 3.26.1-2ubuntu2 (the latter of which I know has
a newer version now in proposed which I'll be installing soon).

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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Re: [Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Nicolás Abel Carbone]

Another follow up about this bug: after some more crashes I am realizing
that they seem to happen when a notification tries to pop up, like when
starting to play a playlist on Spotify or changing the song. Gnome-shell
crashes and the notification pop up never appears. Subsequent notifications
do work.

El mié., 1 de nov. de 2017 a la(s) 11:05, Nicolás Abel Carbone <
nicocarb...@gmail.com> escribió:

> Follow up form my previous comment: note that the crash only happens in
> the first interaction after opening Spotify, further actions doesn't
> trigger the crash again.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1720784).
> https://bugs.launchpad.net/bugs/1505409
>
> Title:
>   gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
>   _XEventsQueued() from XPending() from gdk_check_xpending()
>   ["Connection to xwayland lost"]
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/gnome-shell/+bug/1505409/+subscriptions
>
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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Nicolás Abel Carbone]

Follow up form my previous comment: note that the crash only happens in
the first interaction after opening Spotify, further actions doesn't
trigger the crash again.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Nicolás Abel Carbone]

I think I have found I way to reproduce the crash of gnome-shell, at
least in my PC. Almost always opening up Spotify and double-clicking on
a playlist so it shuffle-plays results in gnome-shell crashing and
recovering a couple of seconds later.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Chris Miller]

So, this definitely isn't a "fix", but it resolved the problem for me
(at least so-far).  I simply dpkg-reconfigured over to another DN
temporarily, rebooted, then swapped back to GDM3 and it went away. Less
of a fix more of a band aid.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Michael Thayer]

At least in my case, I think that the sensible approach is to make
wayland-server treat requests for deleted objects non-fatal, as
suggested by Pekka Paalanan in the blog post linked to above.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Michael Thayer]

Just for the sake of adding a comment too... I am getting this in the following 
situation.  I hope the description is correct.
 1) I change the display set-up on my laptop slightly too fast, e.g. close the 
lid, re-open, re-close (I did that quite a bit recently trying to work out bug 
patterns).
 2) GNOME Shell creates a wl_output object for the internal screen, reports it 
to Xwayland, then removes it again because the screen is disabled again.
 3) Xwayland asks GNOME Shell for more information about the no-longer-existing 
wl_output object and GNOME Shell (in the Wayland library code) terminates the 
connection because it considers asking about a non-existing object to be a bug.
 4) Xwayland dutifully terminates and GNOME Shell panics and terminates too.

See: https://phabricator.freedesktop.org/T7722

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Come to think of it, fixing bug 1724185 might also stop this and bug
1556601 from happening (most of the time, not all the time).

At the moment when gnome-shell/mutter shuts down, Xwayland doesn't cope
well and may silently crash, which in turn is caught by gnome-shell and
gnome-shell crashes with "Connection to xwayland lost". So the act of
trying to debug the situation here and fixing bug 1724185 first might
actually avoid most instances of this one too.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Here's a fix that will help us make rapid progress:

https://bugzilla.gnome.org/show_bug.cgi?id=789086

** Bug watch added: GNOME Bug Tracker #789086
   https://bugzilla.gnome.org/show_bug.cgi?id=789086

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

While this bug is the top gnome-shell crasher by far, it's actually not
what should be fixed first. What we should fix first are the top
Xwayland crashes that are triggering this bug.

Upstream would like to make gnome-shell more independent of Xwayland so
that Xwayland crashes don't also bring down gnome-shell. But that's
longer term, and also would not help those applications using Xwayland
when it crashes.

So let's try to fix the Xwayland crashes first and then this bug then
won't be such an issue. It appears the top xorg-server (Xwayland?)
crasher that might be causing all this is still:

https://errors.ubuntu.com/problem/4de849dfec89af168af9cda3318221a2a654e530
(bug 1543192)

Although that's based on the source package 'xorg-server'. If that's
wrong and we should be looking at this instead (which is empty):

https://errors.ubuntu.com/?package=xwayland=month

then our top priority should be figuring out why Xwayland crashes aren't
getting reported there (comment #31). Because our top priority should be
finding out why Xwayland is crashing (or just failing to start? bug
1543192?)

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[wdeurholt]

Ignore #34. Error came back after some time.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[wdeurholt]

Had this bug. Starting the "Startup Applications Preferences" (gnome-
session-properties) program once, then closing is (not enabling or
disabling anything) solved the problem...

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Rachel Greenham]

I got here because my apport-raised bug #1721492 apparently
automatically got marked as a duplicate of this. I'm not so sure:

This happened after a kernel upgrade to 4.13.0-14-generic. Yesterday I
was happily using this system in a wayland session using nouveau. On
reboot with this update, all I saw was a black screen. I had to ssh in
from my phone to see in /var/log/syslog a bunch of apparent nouveau-drm
failures like this:

Oct  5 10:12:46 fleetfoot kernel: [1.304052] [drm] Initialized nouveau 
1.3.1 20120801 for :01:00.0 on minor 0
Oct  5 10:12:46 fleetfoot kernel: [4.245166] nouveau :01:00.0: DRM: EVO 
timeout
Oct  5 10:12:46 fleetfoot kernel: [6.245268] nouveau :01:00.0: DRM: 
base-1: timeout
Oct  5 10:12:46 fleetfoot kernel: [8.250984] nouveau :01:00.0: DRM: 
base-1: timeout
Oct  5 10:12:47 fleetfoot kernel: [9.292554] nouveau :01:00.0: bus: 
MMIO read of  FAULT at 61a804 [ IBUS ]
Oct  5 10:12:47 fleetfoot kernel: [9.302375] nouveau :01:00.0: bus: 
MMIO read of  FAULT at 61a804 [ IBUS ]
Oct  5 10:12:55 fleetfoot kernel: [   17.770234] nouveau :01:00.0: DRM: 
base-0: timeout
Oct  5 10:12:57 fleetfoot kernel: [   19.770400] nouveau :01:00.0: DRM: 
base-0: timeout
Oct  5 10:12:57 fleetfoot kernel: [   19.776398] nouveau :01:00.0: DRM: 
base-1: timeout
Oct  5 10:12:59 fleetfoot kernel: [   21.776531] nouveau :01:00.0: DRM: 
base-1: timeout
Oct  5 10:12:59 fleetfoot kernel: [   21.807177] nouveau :01:00.0: DRM: 
base-0: timeout
Oct  5 10:13:01 fleetfoot kernel: [   23.782358] nouveau :01:00.0: DRM: 
base-1: timeout
Oct  5 10:13:03 fleetfoot kernel: [   25.801765] nouveau :01:00.0: DRM: 
base-0: timeout
Oct  5 10:13:03 fleetfoot kernel: [   25.807270] nouveau :01:00.0: DRM: 
base-1: timeout
Oct  5 10:13:05 fleetfoot kernel: [   27.818059] nouveau :01:00.0: DRM: 
base-0: timeout
Oct  5 10:13:05 fleetfoot kernel: [   27.823600] nouveau :01:00.0: DRM: 
base-1: timeout

... and so on. It doesn't stop until I reboot (which hangs, although I
think after rsyslogd has closed. I need to hit reset).

I had seen this before, on the first kernel 4.13 version in Artful.
Reverting then to the last 4.12 let things work for me. But trying that
this time, trying to boot kernel 4.13.0.12, didn't help; I just got the
same symptoms.

Got the system working again by installing the nvidia-387 proprietary
drivers and using them in default configuration in an xorg session. On
the previous occasion I saw this, it also affected nvidia-384 (as was
current then), with continual panics reported in the nvidia-drm module,
until I turned off modeset (at the time I had, with partial success,
been running wayland on that). I haven't yet tried modeset on this
nvidia driver.

After I got the system working again, and logged in, I was presented
with the apport bug report that led to #1721492. I queried in there
whether it was the same issue, but on later seeing syslog it looks like
those nouveau errors only show up after gnome-shell (in gdm) is
launched.

Attached to this comment, the complete syslog of that first session
after rebooting from the upgrade. I think those nouveau timeout errors
are the thing. Attached to the next comment (as I seem unable to attach
more than one file to a comment) is the section from
/var/log/apt/history.log showing what was upgraded this morning before
that all happened. Other drivers were involved.

** Attachment added: "syslog.nouveaudrm"
   
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1505409/+attachment/4962743/+files/syslog.nouveaudrm

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Rachel Greenham]

/var/log/history.log section as per above post

** Attachment added: "part-history.log"
   
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1505409/+attachment/4962744/+files/part-history.log

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Jeremy Bicha]

Daniel, I think there are a lot of crashes that are never reported
because apport didn't work (maybe it still doesn't) in the Wayland
session.

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Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Jean-Baptiste Lallement]

** Also affects: mutter (Ubuntu Artful)
   Importance: High
   Status: Confirmed

** Also affects: gnome-shell (Ubuntu Artful)
   Importance: High
   Status: Confirmed

** Also affects: gdm3 (Ubuntu Artful)
   Importance: High
   Status: Confirmed

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  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Frogs Hair]

Confirmed

Ubuntu Artful Development release.

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https://bugs.launchpad.net/bugs/1505409

Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

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Re: [Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Per-Inge]

I get the bug notification directly after boot, but only after an upgrade.
It's strange that there is No reference to the known bug. I am useing the
Ubuntu login.
Regards Per-inge

Den 26 juli 2017 9:25 fm skrev "Daniel van Vugt" <
daniel.van.v...@canonical.com>:

> Weirdly there are practically no crashes reported for Xwayland:
>   https://errors.ubuntu.com/?package=xwayland=year
>
> This makes me suspect that gnome-shell might be managing the Xwayland
> process and possibly hiding its crashes (including the root cause of
> this bug) from errors.ubuntu.com.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1696904).
> https://bugs.launchpad.net/bugs/1505409
>
> Title:
>   gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
>   _XEventsQueued() from XPending() from gdk_check_xpending()
>   ["Connection to xwayland lost"]
>
> Status in GNOME Shell:
>   Confirmed
> Status in Ubuntu GNOME:
>   Confirmed
> Status in gdm3 package in Ubuntu:
>   Confirmed
> Status in gnome-shell package in Ubuntu:
>   Confirmed
> Status in mutter package in Ubuntu:
>   Confirmed
>
> Bug description:
>   https://errors.ubuntu.com/problem/d0252e2b465152efea2511e72f1e31
> 681e2b2742
>
>   ---
>
>   Occurred during start-up, before I did anything special...
>
>   1 Ubuntu Wily Werewolf (development branch) 15.10
>   2 3.16.3-1ubuntu6
>   3&4 not applicable
>
>   ProblemType: Crash
>   DistroRelease: Ubuntu 15.10
>   Package: gnome-shell 3.16.3-1ubuntu6
>   ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
>   Uname: Linux 4.2.0-16-generic x86_64
>   NonfreeKernelModules: wl
>   ApportVersion: 2.19.1-0ubuntu2
>   Architecture: amd64
>   CurrentDesktop: GNOME
>   Date: Mon Oct 12 19:22:07 2015
>   DisplayManager: gdm
>   ExecutablePath: /usr/bin/gnome-shell
>   GsettingsChanges:
>
>   InstallationDate: Installed on 2015-10-08 (4 days ago)
>   InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64
> (20150924)
>   ProcCmdline: gnome-shell --mode=gdm --wayland --display-server
>   ProcEnviron:
>SHELL=/bin/false
>PATH=(custom, no user)
>XDG_RUNTIME_DIR=
>LANG=nl_NL.UTF-8
>   Signal: 5
>   SourcePackage: gnome-shell
>   StacktraceTop:
>?? () from /usr/lib/libmutter.so.0
>_XIOError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
>_XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6
>XPending () from /usr/lib/x86_64-linux-gnu/libX11.so.6
>?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
>   Title: gnome-shell crashed with signal 5 in _XIOError()
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   UserGroups:
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/gnome-shell/+bug/1505409/+subscriptions
>

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https://bugs.launchpad.net/bugs/1505409

Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

To manage notifications about this bug go to:
https://bugs.launchpad.net/gnome-shell/+bug/1505409/+subscriptions

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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

Weirdly there are practically no crashes reported for Xwayland:
  https://errors.ubuntu.com/?package=xwayland=year

This makes me suspect that gnome-shell might be managing the Xwayland
process and possibly hiding its crashes (including the root cause of
this bug) from errors.ubuntu.com.

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https://bugs.launchpad.net/bugs/1505409

Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

To manage notifications about this bug go to:
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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Jeremy Bicha]

Oh, I think this issue has been talked about in Debian too.

https://bugzilla.gnome.org/782660

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https://bugs.launchpad.net/bugs/1505409

Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

To manage notifications about this bug go to:
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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

In theory if the problem is Xwayland/Xorg going away then we could see a
similar huge number of crashes there as in this bug. And we do. But
surprisingly the binary is listed as Xorg, not Xwayland:

Top gnome-shell crash (this bug): 37442 occurrences this year
https://errors.ubuntu.com/problem/d0252e2b465152efea2511e72f1e31681e2b2742

Top Xorg crash (bug 1543192): 36403 occurrences this year
https://errors.ubuntu.com/problem/4de849dfec89af168af9cda3318221a2a654e530

There could be some causation there...

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https://bugs.launchpad.net/bugs/1505409

Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

To manage notifications about this bug go to:
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[Bug 1505409] Re: gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from _XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to xwayland lost"]

[Daniel van Vugt]

** Summary changed:

- gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from 
_XEventsQueued() from XPending() from gdk_check_xpending()
+ gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from 
_XEventsQueued() from XPending() from gdk_check_xpending() ["Connection to 
xwayland lost"]

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https://bugs.launchpad.net/bugs/1505409

Title:
  gnome-shell crashed with SIGTRAP in x_io_error() from _XIOError() from
  _XEventsQueued() from XPending() from gdk_check_xpending()
  ["Connection to xwayland lost"]

To manage notifications about this bug go to:
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