Public bug reported:
My setup: office with two screens and a long cable to a TV screen in the
next room. The TV screen is off.
Error: Upon starting ubuntu, GDM shows only blank screens. When the TV
is unplugged, I can see the GDM login screen. Moving mouse pointer to
one of the screens in my office does when the TV screen is plugged in
does not reveal the login screen.
Expected behavior: To see the login prompt. Either duplicated on all
screens, or on the screen the mouse points at.
First try at a solution: Remove TV screen, see login screen, login, plug
in TV screen, select screen layout in the settings manager so one of the
office screens is main. Outcome: does nothing.
Current solution: Copy setting's monitor.xml to replace GDM's
monitor.xml. This now works for me so I do not want to play with this
anymore, but I suspect it will fail again at some point since this
manual copy-pasting of files is just weird.
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
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed May 13 09:12:16 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: No
GraphicsCard:
NVIDIA Corporation GM200 [GeForce GTX 980 Ti] [10de:17c8] (rev a1) (prog-if 00
[VGA controller])
Subsystem: ASUSTeK Computer Inc. GM200 [GeForce GTX 980 Ti] [1043:8548]
InstallationDate: Installed on 2020-05-11 (1 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Exertis_CapTech MS-7976
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic
root=UUID=2958a704-4409-4d8f-8c8b-6752dd7508c7 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/22/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.B0
dmi.board.asset.tag: Default string
dmi.board.name: Z170A GAMING M7 (MS-7976)
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1.B0:bd02/22/2016:svnExertis_CapTech:pnMS-7976:pvr1.0:rvnMSI:rnZ170AGAMINGM7(MS-7976):rvr1.0:cvnMSI:ct3:cvr1.0:
dmi.product.family: Default string
dmi.product.name: MS-7976
dmi.product.sku: Default string
dmi.product.version: 1.0
dmi.sys.vendor: Exertis_CapTech
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 N/A
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
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal ubuntu
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https://bugs.launchpad.net/bugs/1878355
Title:
TV monitor shows login information, not selected displays
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