gnome shell crashes after scaling is changed from 100% to 200% (segfault at 8 ip 00007f22c7bdf877 sp 00007ffde76cadf0 error 4 in libmutter-1.so.0.0.0[7f22c7b36000+141000])

[Dmitrii Shcherbakov]

Attached screenshots for "before applying" and after.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 7 21:57:36 2017
DisplayManager: gdm3
InstallationDate: Installed on 2017-02-27 (222 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20170227)
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to artful on 2017-09-13 (23 days ago)

[Dmitrii Shcherbakov (dmitriis)]

This used to work before recent a update of several distro packages.

Currently settings are not applied and everything falls back to "Join displays" instead of "Single Display"

[Dmitrii Shcherbakov (dmitriis)]

This used to work before recent a update of several distro packages.

Currently settings are not applied and everything falls back to "Join displays" instead of "Single Display".

---

After debugging that a little bit more I can see that the bug is not triggered if I do not change scaling from 100% to 200% at the same time. The primary laptop display goes offline and I only have a secondary running.

If I try to go from "Scaling: 100%" to 200%, I immediately get the problematic behavior.

➜ ~ echo $XDG_SESSION_DESKTOP
ubuntu-xorg

This is what goes to syslog right after I press a button to change scaling to 200%.
http://paste.ubuntu.com/25694579/

[Launchpad Janitor (janitor)]

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