gnome-shell crashed with signal 5

[corrado venturini]

Just started. only firefox active.
corrado@corrado-p6-bb-1114:~$ inxi -Fx
System: Host: corrado-p6-bb-1114 Kernel: 4.13.0-16-generic x86_64 bits: 64 gcc: 7.2.0
           Desktop: Gnome 3.26.2 (Gtk 2.24.31) Distro: Ubuntu Bionic Beaver (development branch)
Machine: Device: desktop Mobo: ASRock model: H110M-G/M.2 serial: N/A UEFI: American Megatrends v: P1.10 date: 05/11/2017
CPU: Dual core Intel Core i3-7100 (-HT-MCP-) arch: Skylake rev.9 cache: 3072 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 15648
           clock speeds: max: 3900 MHz 1: 3900 MHz 2: 3900 MHz 3: 3900 MHz 4: 3900 MHz
Graphics: Card: Intel HD Graphics 630 bus-ID: 00:02.0
           Display Server: x11 (X.Org 1.19.5 ) driver: i915 Resolution: 1920x1080@60.00hz
           OpenGL: renderer: Mesa DRI Intel HD Graphics 630 (Kaby Lake GT2)
           version: 4.5 Mesa 17.2.4 Direct Render: Yes
Audio: Card Intel Sunrise Point-H HD Audio driver: snd_hda_intel bus-ID: 00:1f.3
           Sound: Advanced Linux Sound Architecture v: k4.13.0-16-generic
Network: Card: Intel Ethernet Connection (2) I219-V driver: e1000e v: 3.2.6-k bus-ID: 00:1f.6
           IF: enp0s31f6 state: up speed: 100 Mbps duplex: full mac: 70:85:c2:44:7b:86
Drives: HDD Total Size: 1000.2GB (1.6% used)
           ID-1: /dev/sda model: TOSHIBA_DT01ACA1 size: 1000.2GB
Partition: ID-1: / size: 32G used: 6.9G (24%) fs: ext4 dev: /dev/sda6
           ID-2: swap-1 size: 8.59GB used: 0.00GB (0%) fs: swap dev: /dev/sda2
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 34.5C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info: Processes: 232 Uptime: 8 min Memory: 1179.2/7684.1MB Init: systemd runlevel: 5 Gcc sys: 7.2.0
           Client: Shell (bash 4.4.121) inxi: 2.3.40
corrado@corrado-p6-bb-1114:~$

corrado@corrado-p6-bb-1114:~$ apt policy gnome-shell
gnome-shell:
  Installed: 3.26.2-0ubuntu1
  Candidate: 3.26.2-0ubuntu1
  Version table:
 *** 3.26.2-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status
corrado@corrado-p6-bb-1114:~$

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.26.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.8-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME-Greeter:GNOME
Date: Thu Nov 23 22:24:01 2017
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
GsettingsChanges:

InstallationDate: Installed on 2017-11-16 (8 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171114)
ProcCmdline: /usr/bin/gnome-shell
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: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1732878, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.