Comment 0 for bug 1876534

I'm running Ubuntu 20.04 LTS on a ThinkPad P72 with a Quadro P5200. I recently purchased the ThinkPad Workstation Dock Gen2 and have been having issues with external displays on it.

There are a multitude of issues with this. Sometimes you can plug in displays and both will show up fine after running xrandr --auto. Sometimes only one will appear and the other will stay black.

There is a chance for any of these things to happen after making a display configuration change:
- Nothing (displays work fine)
- One display stays black
- All displays including laptop internal display freeze, which is recoverable only by physically disconnecting the displays from the dock
- Displays flicker on and off rapidly before every one goes dark including the laptop's internal display, requiring a hard reset.

I have tried:
- Upgrading to a newer kernel version (5.6.7) via mainline
- Upgrading all system firmware, including dock, to latest via Lenovo Vantage in Windows dual boot
- Downgrading the dock firmware from 3166 to 3164 - despite suggestions by people in this thread in the Lenovo community https://forums.lenovo.com/t5/Ubuntu/Thinkpad-P1-Gen2-amp-Thunderbolt-3-Workstation-Dock-amp-Linux-Ubuntu-Monitor-s-black/m-p/4575709?page=3 - this did not work
- Downgrading the NVIDIA driver version to both 435 and 390 - neither worked

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair 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.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 440.64 Fri Feb 21 01:17:26 UTC 2020
 GCC version: gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Sun May 3 00:37:27 2020
DistUpgraded: 2020-03-04 19:48:20,592 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 acpi-call, 1.1.0, 5.4.0-28-generic, x86_64: installed
 nvidia, 440.64, 5.4.0-28-generic, x86_64: installed
 v4l2loopback, 0.12.3, 5.4.0-28-generic, x86_64: installed
 wireguard, 1.0.20200413, 5.4.0-28-generic, x86_64: installed (WARNING! Diff between built and installed module!)
ExtraDebuggingInterest: Yes, including running git bisection searches
GpuHangFrequency: This is the first time
GraphicsCard:
 Intel Corporation Device [8086:3e94] (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:2269]
 NVIDIA Corporation GP104GLM [Quadro P5200 Mobile] [10de:1bb5] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Lenovo GP104GLM [Quadro P5200 Mobile] [17aa:2269]
InstallationDate: Installed on 2019-10-19 (196 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: LENOVO 20MCS08200
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-28-generic root=/dev/mapper/vgubuntu-root ro quiet splash intel_iommu=on default_hugepagesz=1G hugepagesz=1G hugepages=32 transparent_hugepage=never vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to focal on 2020-03-04 (59 days ago)
dmi.bios.date: 01/15/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N2CET50W (1.33 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20MCS08200
dmi.board.vendor: LENOVO
dmi.board.version: SDK0Q40104 WIN
dmi.chassis.asset.tag: 00040
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN2CET50W(1.33):bd01/15/2020:svnLENOVO:pn20MCS08200:pvrThinkPadP72:rvnLENOVO:rn20MCS08200:rvrSDK0Q40104WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad P72
dmi.product.name: 20MCS08200
dmi.product.sku: LENOVO_MT_20MC_BU_Think_FM_ThinkPad P72
dmi.product.version: ThinkPad P72
dmi.sys.vendor: LENOVO
nvidia-settings:
 ERROR: Unable to load info from any available system

 ERROR: Unable to load info from any available system
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1