Ubuntu
xorg-server package

[nvidia] Hotplugging HDMI monitor is ignored, needs to be manually re-enabled

Bug #1878951 reported by Frank Blah on 2020-05-15

This bug affects 1 person

	Status	Importance	Assigned to
mutter (Ubuntu)	New	Low	Unassigned
nvidia-graphics-drivers-440 (Ubuntu)	New	Low	Unassigned
xorg-server (Ubuntu)	New	Low	Unassigned

Bug Description

Steps to reproduce:
1. Successfully connect AOC u2879vf external display by attaching HDMI cable
2. Remove the cable, output switches to the built-in display and external display goes black
3. Reconnect the HDMI cable again

What is expected:
The external screen should display the image (as in step 1)

What happened instead:
The system thinks the display is connected (see the xrandr output), but the external display is still black (no signal). The clumsy workaround is to use Super+P to switch to "built-in display only" and then back to "joint". After that, the external monitor comes back.

xrandr outputs:

Step 1
Screen 0: minimum 8 x 8, current 3840 x 3240, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 621mm x 341mm
   3840x2160 60.00*+ 59.94 50.00 29.98 29.97 25.00 23.98
   1920x2160 59.99
   1920x1080 60.00 59.94 50.00
   1680x1050 59.95
   1440x900 59.89
   1280x1024 75.02 60.02
   1280x960 60.00
   1280x720 60.00 59.94 50.00
   1024x768 75.03 70.07 60.00
   800x600 75.00 72.19 60.32 56.25
   720x576 50.00
   720x480 59.94
   640x480 75.00 72.81 59.94 59.93
DP-1 connected 1920x1080+909+2160 (normal left inverted right x axis y axis) 344mm x 193mm
   1920x1080 60.03*+ 40.02
DP-2 disconnected (normal left inverted right x axis y axis)

Step 2
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1920x1080 60.03*+ 40.02
DP-2 disconnected (normal left inverted right x axis y axis)

Step 3
Screen 0: minimum 8 x 8, current 3840 x 3240, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 621mm x 341mm
   3840x2160 60.00*+ 59.94 50.00 29.98 29.97 25.00 23.98
   1920x2160 59.99
   1920x1080 60.00 59.94 50.00
   1680x1050 59.95
   1440x900 59.89
   1280x1024 75.02 60.02
   1280x960 60.00
   1280x720 60.00 59.94 50.00
   1024x768 75.03 70.07 60.00
   800x600 75.00 72.19 60.32 56.25
   720x576 50.00
   720x480 59.94
   640x480 75.00 72.81 59.94 59.93
DP-1 connected 1920x1080+1097+2160 (normal left inverted right x axis y axis) 344mm x 193mm
   1920x1080 60.03*+ 40.02
DP-2 disconnected (normal left inverted right x axis y axis)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
NonfreeKernelModules: 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:
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri May 15 17:43:16 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
NVIDIA Corporation TU117GLM [Quadro T2000 Mobile / Max-Q] [10de:1fb8] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company TU117GLM [Quadro T2000 Mobile / Max-Q] [103c:8611]
InstallationDate: Installed on 2020-05-11 (3 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: HP HP ZBook 15 G6
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=9895584a-6648-494d-9d91-e64ba192dd95 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/25/2019
dmi.bios.vendor: HP
dmi.bios.version: R92 Ver. 01.02.01
dmi.board.name: 860F
dmi.board.vendor: HP
dmi.board.version: KBC Version 65.23.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrR92Ver.01.02.01:bd09/25/2019:svnHP:pnHPZBook15G6:pvr:rvnHP:rn860F:rvrKBCVersion65.23.00:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN HP ZBook 15
dmi.product.name: HP ZBook 15 G6
dmi.product.sku: 6CJ09AV
dmi.sys.vendor: HP
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

Tags:

Revision history for this message

Frank Blah (sitnarf) wrote on 2020-05-15:

.proc.driver.nvidia.params.txt Edit (690 bytes, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (253.9 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (22.7 KiB, text/plain; charset="utf-8")
DpkgLog.txt Edit (1.3 MiB, text/plain; charset="utf-8")
LightdmDisplayLog.txt Edit (1018 bytes, text/plain; charset="utf-8")
LightdmLog.txt Edit (12.7 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (23.0 KiB, text/plain; charset="utf-8")
Lspci-vt.txt Edit (1.9 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (617 bytes, text/plain; charset="utf-8")
Lsusb-t.txt Edit (960 bytes, text/plain; charset="utf-8")
Lsusb-v.txt Edit (57.6 KiB, text/plain; charset="utf-8")
MonitorsUser.xml.txt Edit (1.5 KiB, text/plain; charset="utf-8")
NvidiaBugReportLog.txt Edit (1.0 KiB, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (15.4 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.3 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (310 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (13.3 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (9.9 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (287.5 KiB, text/plain; charset="utf-8")
XorgLog.txt Edit (54.8 KiB, text/plain; charset="utf-8")
XorgLogOld.txt Edit (60.6 KiB, text/plain; charset="utf-8")
Xrandr.txt Edit (10.2 KiB, text/plain; charset="utf-8")
nvidia-settings.txt Edit (70.0 KiB, text/plain; charset="utf-8")
xdpyinfo.txt Edit (44.8 KiB, text/plain; charset="utf-8")

Daniel van Vugt (vanvugt) on 2020-05-18

summary:	- External monitor won't reconnect after reattaching HDMI cable + [nvidia] Hotplugging HDMI monitor is ignored, needs to be manually re- + enabled
affects:	xorg (Ubuntu) → xorg-server (Ubuntu)
tags:	added: multimonitor nvidia
Changed in mutter (Ubuntu):
importance:	Undecided → Low
Changed in nvidia-graphics-drivers-440 (Ubuntu):
importance:	Undecided → Low
Changed in xorg-server (Ubuntu):
importance:	Undecided → Low

Revision history for this message

Frank Blah (sitnarf) wrote on 2020-08-02:

Workaround for me was to use external USB-C to HDMI adapter and plug the USB-C to the computer.

Report a bug

This report contains Public information

Everyone can see this information.

You are

Subscribing...

Edit bug mail

Other bug subscribers

Bug attachments

Add attachment

Remote bug watches

Bug watches keep track of this bug in other bug trackers.

Ubuntuxorg-server package