Xorg crashed with SIGABRT in OsAbort()

[Gonçalo Marrafa]

I have this problem on a Dell XPS 15 laptop. It only happens when i have an external monitor connected via the HDMI port. Using only the builtin panel everything works fine.

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: xserver-xorg-core 2:1.20.1-3ubuntu2.1
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 390.87 Tue Aug 21 12:33:05 PDT 2018
 GCC version: gcc version 8.2.0 (Ubuntu 8.2.0-7ubuntu1)
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: GNOME-Greeter:GNOME
Date: Wed Nov 21 09:14:09 2018
DistUpgraded: 2018-10-19 18:59:17,410 DEBUG icon theme changed, re-reading
DistroCodename: cosmic
DistroVariant: ubuntu
ExecutablePath: /usr/lib/xorg/Xorg
GraphicsCard:
 Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:07be]
   Subsystem: Dell GP107M [GeForce GTX 1050 Mobile] [1028:07be]
InstallationDate: Installed on 2017-12-14 (341 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: Dell Inc. XPS 15 9560
ProcCmdline: /usr/lib/xorg/Xorg vt1 -displayfd 3 -auth /run/user/121/gdm/Xauthority -background none -noreset -keeptty -verbose 7 -core
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-11-generic root=UUID=bb01d64f-ad15-47bb-98ae-1e405ade258d ro quiet splash vt.handoff=1
Signal: 6
SourcePackage: nvidia-graphics-drivers
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 xf86VTEnter ()
 ?? ()
Title: Xorg crashed with SIGABRT in OsAbort()
UpgradeStatus: Upgraded to cosmic on 2018-10-19 (32 days ago)
UserGroups:

dmi.bios.date: 10/02/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.12.1
dmi.board.name: 0YH90J
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.12.1:bd10/02/2018:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn0YH90J:rvrA03:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 15 9560
dmi.product.sku: 07BE
dmi.sys.vendor: Dell Inc.
mtime.conffile..etc.apport.crashdb.conf: 2018-11-21T09:13:30.219492
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3

[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 #1787332, 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.