lost session when hibernate (reset session)

[Martineau]

When I switch between my desk (with a docking station and an extra screen) and standalone position (PC alone without connection with any device), my computer reset X session and loose all the working session.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.15.0-72.81-generic 4.15.18
Uname: Linux 4.15.0-72-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] est un dossier: '/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 410.48 Thu Sep 6 06:36:33 CDT 2018
 GCC version: gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
.tmp.unity_support_test.0:

ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Fri Jan 3 10:36:33 2020
DistUpgraded: 2018-12-07 12:13:28,435 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 410.48, 4.15.0-70-generic, x86_64: installed
 nvidia, 410.48, 4.15.0-72-generic, x86_64: installed
DpkgLog:

ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:07b0]
 NVIDIA Corporation GM206GLM [Quadro M2200 Mobile] [10de:1436] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell GM206GLM [Quadro M2200 Mobile] [1028:07b0]
InstallationDate: Installed on 2018-06-12 (569 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
MachineType: Dell Inc. Precision 7520
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-72-generic root=UUID=a13fc76a-0a74-4653-8ab7-ca7342579d56 ro acpi_rev_override acpi_rev_override acpi_rev_override acpi_rev_override quiet splash vt.handoff=1
SourcePackage: xorg
UpgradeStatus: Upgraded to bionic on 2018-12-07 (391 days ago)
dmi.bios.date: 05/30/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.15.1
dmi.board.name: 0GC6C7
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.15.1:bd05/30/2019:svnDellInc.:pnPrecision7520:pvr:rvnDellInc.:rn0GC6C7:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Precision
dmi.product.name: Precision 7520
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
version.libdrm2: libdrm2 2.4.97-1ubuntu1~18.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.8-0ubuntu0~18.04.3
version.libgl1-mesa-glx: libgl1-mesa-glx 19.0.8-0ubuntu0~18.04.3
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
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

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It sounds like some part of the system has crashed. To help us find the cause of the crash please follow these steps:

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

2. If step 1 failed then look at https://errors.ubuntu.com/user/ID where ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine. Do you find any links to recent problems on that page? If so then please send the links to us.

3. If step 2 also failed then apply the workaround from bug 994921, reboot, reproduce the crash, and retry step 1.

Please take care to avoid attaching .crash files to bugs as we are unable to process them as file attachments. It would also be a security risk for yourself.

[Launchpad Janitor (janitor)]

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