if suspended with 'close lid', Xorg crashes

[Fergus Incoronato]

1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu

$ lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04

2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center

$ apt-cache policy nvidia-driver-390
nvidia-driver-390:
  Installed: 390.48-0ubuntu3
  Candidate: 390.48-0ubuntu3
  Version table:
 *** 390.48-0ubuntu3 500
        500 http://se.archive.ubuntu.com/ubuntu bionic/restricted amd64 Packages
        100 /var/lib/dpkg/status

$ apt-cache policy xorg
xorg:
  Installed: 1:7.7+19ubuntu7.1
  Candidate: 1:7.7+19ubuntu7.1
  Version table:
 *** 1:7.7+19ubuntu7.1 500
        500 http://se.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:7.7+19ubuntu7 500
        500 http://se.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

$ apt-cache policy xwayland
xwayland:
  Installed: 2:1.19.6-1ubuntu4
  Candidate: 2:1.19.6-1ubuntu4
  Version table:
 *** 2:1.19.6-1ubuntu4 500
        500 http://se.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen

When I open the lid I expect the system to resume without logging me out.

4) What happened instead

If I close the lid and the system is configured to suspend on lid-close, then on system resume it seeems like I get logged out of my X session.

Now depending on the content of /etc/gdm3/custom.conf two different things can happen:

a) if WaylandEnable=false is commented out (as by default), after opening the lid I am presented with GDM3 login screen and, at least, I can login again.

b) if WaylandEnable=false is uncommented, then after opening the lid on the monitor I either have a black screen with ONLY a blinking prompt OR what appears to be text from booting, and I can't do anything but reboot.

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: xserver-xorg-core 2:1.19.6-1ubuntu4
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.02.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:02:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 390.48 Thu Mar 22 00:42:57 PDT 2018
 GCC version: gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CompositorRunning: None
CrashCounter: 1
Date: Tue Aug 28 23:04:50 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 390.48, 4.15.0-23-generic, x86_64: installed
 nvidia, 390.48, 4.15.0-30-generic, x86_64: installed
 nvidia, 390.48, 4.15.0-32-generic, x86_64: installed
 nvidia, 390.48, 4.15.0-33-generic, x86_64: installed
ExecutablePath: /usr/lib/xorg/Xorg
GraphicsCard:
 Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:505e]
   Subsystem: Lenovo GM108M [GeForce 940MX] [17aa:505e]
MachineType: LENOVO 20J6CTO1WW
ProcCmdline: /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -background none -noreset -keeptty -verbose 7 -core
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-33-generic root=UUID=044a98fa-a770-435c-816f-9aab185e650a ro quiet splash resume=UUID=866bcee2-828c-41ee-a445-ed0fd5a2f921 vt.handoff=1
Signal: 6
SourcePackage: nvidia-graphics-drivers
StacktraceTop:
 ()
 ()
 ()
 ()
 ()
Title: Xorg crashed with SIGABRT
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 09/28/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: R0FET37W (1.17 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20J6CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrR0FET37W(1.17):bd09/28/2017:svnLENOVO:pn20J6CTO1WW:pvrThinkPadT470p:rvnLENOVO:rn20J6CTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470p
dmi.product.name: 20J6CTO1WW
dmi.product.version: ThinkPad T470p
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[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.