Xorg session reset on suspend / wake-up

[Kgorbi]

My preconditions:
- running Chromium + Thunderbird on workspace 1
- running 2x Eclipse + Notepad on workspace 2 - active workspace
- using internal laptop screen
- using Gnome desktop with dynamic workspaces

How I reproduce (with almost 100% success):
- Suspend (using suspend button from system menu)
- connect external monitors to Display-Port (primary) and SVGA (secondary); internal laptop screen is disabled in this configuration (saved)
- wake-up

Current result:
- Xorg session is re-started and *no* applications from previous session are running.

Expected result:
- System resumes where it was before with all applications continuing from where they were on suspend.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-24.26~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-24-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm 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 396.24.02 Thu May 24 03:48:07 PDT 2018
 GCC version: gcc version 7.3.0 (Ubuntu 7.3.0-21ubuntu1~16.04)
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: GNOME
Date: Wed Jul 11 09:56:12 2018
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f6]
MachineType: LENOVO 244759G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-24-generic root=UUID=cf56f770-2527-47cc-bf3b-a1815c6c2a09 ro quiet splash acpi_osi=Linux acpi_backlight=none vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/24/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: G5ETA6WW (2.66 )
dmi.board.asset.tag: Not Available
dmi.board.name: 244759G
dmi.board.vendor: LENOVO
dmi.board.version: Win8 Pro DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG5ETA6WW(2.66):bd08/24/2016:svnLENOVO:pn244759G:pvrThinkPadW530:rvnLENOVO:rn244759G:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad W530
dmi.product.name: 244759G
dmi.product.version: ThinkPad W530
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.3+16.04.20180221-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.91-2~16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~16.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~16.04.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Wed Jul 11 09:54:47 2018
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.19.6-1ubuntu4~16.04.1

[Daniel van Vugt (vanvugt)]

It sounds like some part of the system has crashed. Please:

1. Apply the workaround from bug 994921.

2. Look in /var/crash for crash files and if found run:
     ubuntu-bug YOURFILE.crash
   and tell us the ID of the newly-created bug.

3. If step 2 failed then look at https://errors.ubuntu.com/user/ID where ID is the contents of the /var/lib/whoopsie/whoopsie-id file on the machine. Do you find any links to recent problems on the machine? If so then please send them to us.

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]