the log has a gnome-shell segfault and that error "setup_framebuffers:
assertion 'width > 0' failed"
do you have any apport report in /var/crash?
** Package changed: gnome-session (Ubuntu) => gnome-shell (Ubuntu)
** Changed in: gnome-shell (Ubuntu)
Importance: Undecided => High
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1723882
Title:
Ubuntu session crashes sometimes when notifications appear
Status in gnome-shell package in Ubuntu:
Incomplete
Bug description:
Since the update to 17.10 beta, my ubuntu-session crashes rather
frequently (though not always) when notifications appear. It happened,
e.g. when a new e-mail was received in Thunderbird, or when I clicked
the "play" button in the Spotify client.
It may be linked to the dual screen setup I use, since I don't seem to
have the same problem on my other laptop (single screen) with 17.10.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ubuntu-session 3.26.1-0ubuntu5
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 16 10:24:29 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-07-03 (104 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: gnome-session
UpgradeStatus: Upgraded to artful on 2017-10-09 (6 days ago)
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https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1723882/+subscriptions
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