Shell crashes with JS ERROR: TypeError: monitor is null

[Laura Dietz]

Periodically when I suspend my computer and resume it I find that my session is gone. The following is logged in the journal after such an event,

Dec 15 16:20:35 jam gnome-shell[1501]: JS ERROR: TypeError: monitor is null
                                       BoxPointer<._reposition@resource:///org/gnome/shell/ui/boxpointer.js:507:13
                                       wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
                                       BoxPointer<._allocate@resource:///org/gnome/shell/ui/boxpointer.js:234:13
                                       wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
                                       LayoutManager<._init/<@resource:///org/gnome/shell/ui/layout.js:208:33
Dec 15 16:20:36 jam org.gnome.Shell.desktop[1501]: == Stack trace for context 0x564daca8d000 ==

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: xorg 1:7.7+19ubuntu3
ProcVersionSignature: Ubuntu 4.13.0-18.21-generic 4.13.13
Uname: Linux 4.13.0-18-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec 15 16:29:40 2017
DistUpgraded: Fresh install
DistroCodename: artful
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Iris Graphics 540 [8086:1926] (rev 0a) (prog-if 00 [VGA controller])
   Subsystem: Dell Iris Graphics 540 [1028:06dc]
InstallationDate: Installed on 2017-11-24 (21 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: Dell Inc. Latitude E7470
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-18-generic.efi.signed root=UUID=68384484-a30e-4aa4-990d-3727f8967b40 ro quiet splash vt.handoff=7
Renderer: Software
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/11/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.17.5
dmi.board.name: 0YDW8F
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.17.5:bd07/11/2017:svnDellInc.:pnLatitudeE7470:pvr:rvnDellInc.:rn0YDW8F:rvrA03:cvnDellInc.:ct9:cvr:
dmi.product.family: Latitude
dmi.product.name: Latitude E7470
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.83-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu1~17.10.1
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu1~17.10.1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

Please look in /var/crash for .crash files and if found then:
  1. Apply the workaround from bug 994921.
  2. Upload the file by running: ubuntu-bug /var/crash/YOURFILE.crash
  3. Tell us the ID of the newly created bug.

[Launchpad Janitor (janitor)]

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

[Jack Wasey (jackwasey)]

This doesn't create a crash dump for me, and happens without a suspend/resume/restart

[Daniel van Vugt (vanvugt)]

Jack: This bug is closed. Please open a new bug.