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 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1878355 Title: TV monitor shows login information, not selected displays To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1878355/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp