GPU disconnect, then minutes later Xorg display lockup

[beadon]

It appears that occassionally my external GPU 'falls off' the bus, it's listed as not primary, so should not be an issue.

However, a few minutes (usually) after this occurs, the Xorg server or window manager completely locks up in strange ways. For example - the mouse can move across the multiple monitors, but no clicks are registered. similarly, no keyboard keypresses result in any change in the UI.

However, applications happily run in the background - videoconference meetings using the audio mic and speakers continue to operate , and the machine stays online. This leads me to believe there is some problem with Xorg capturing the Human interface devices and passing these to the correct applications, and then updating the displays.

I don't know how to trigger this behavior reliably, but I am getting closer to tracking down how it occurs. I hoped you might be able to shed some light as to why this might be happening and how to resolve it.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 6.2.0-25.25-generic 6.2.13
Uname: Linux 6.2.0-25-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file.
.proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
.proc.driver.nvidia.gpus.0000.52.00.0: Error: path was not a regular file.
.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 535.54.03 Tue Jun 6 22:20:39 UTC 2023
 GCC version: gcc version 12.2.0 (Ubuntu 12.2.0-17ubuntu1)
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 19 14:33:01 2023
DistUpgraded: 2023-04-26 15:38:23,675 DEBUG Running PostInstallScript: '/usr/lib/ubuntu-advantage/upgrade_lts_contract.py'
DistroCodename: lunar
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics] [8086:9a49] (rev 01) (prog-if 00 [VGA controller])
   Subsystem: Lenovo TigerLake-LP GT2 [Iris Xe Graphics] [17aa:22d4]
 NVIDIA Corporation TU117 [GeForce GTX 1650] [10de:1f82] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: eVga.com. Corp. TU117 [GeForce GTX 1650] [3842:1257]
InstallationDate: Installed on 2023-01-09 (191 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
MachineType: LENOVO 20XY0027US
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.2.0-25-generic root=UUID=1cae8af8-977f-4853-9106-9169f34c4bc2 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to lunar on 2023-04-26 (84 days ago)
dmi.bios.date: 06/12/2023
dmi.bios.release: 1.61
dmi.bios.vendor: LENOVO
dmi.bios.version: N32ET85W (1.61 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20XY0027US
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.34
dmi.modalias: dmi:bvnLENOVO:bvrN32ET85W(1.61):bd06/12/2023:br1.61:efr1.34:svnLENOVO:pn20XY0027US:pvrThinkPadX1YogaGen6:rvnLENOVO:rn20XY0027US:rvrSDK0J40697WIN:cvnLENOVO:ct31:cvrNone:skuLENOVO_MT_20XY_BU_Think_FM_ThinkPadX1YogaGen6:
dmi.product.family: ThinkPad X1 Yoga Gen 6
dmi.product.name: 20XY0027US
dmi.product.sku: LENOVO_MT_20XY_BU_Think_FM_ThinkPad X1 Yoga Gen 6
dmi.product.version: ThinkPad X1 Yoga Gen 6
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.114-1
version.libgl1-mesa-dri: libgl1-mesa-dri 23.0.4-0ubuntu1~23.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 23.0.4-0ubuntu1~23.04.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.7-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

[Daniel van Vugt (vanvugt)]

It sounds like you've hit the problem Nvidia mentions in their documentation:

  http://us.download.nvidia.com/XFree86/Linux-x86_64/535.54.03/README/egpu.html

so I guess falling off the bus is just as bad as being unplugged.

Can you provide logs mentioning falling off the bus? I only recall a different user mentioning it recently in bug 2023585.

[Launchpad Janitor (janitor)]

[Expired for nvidia-graphics-drivers-535 (Ubuntu) because there has been no activity for 60 days.]