Further to comment #4, last I checked (when working on Mir) it was impossible to distinguish between a plugged in monitor that is on and one that is off. In software we can't tell the difference. It's detected all the same :(
** Changed in: gnome-shell (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1778093 Title: With multiple monitors, live sessions and the installer should use clone mode, not spanning. Status in gnome-shell package in Ubuntu: Confirmed Bug description: The installation system comes up expecting 2 displays and the window decorations are in the non visible screen as is the control panel for performing the install. By bringing the cursor to the active screen (it starts out far left off screen), I can start a terminal from the menu and then start gnome-control-center to fix the display and then the installation can proceed. I've seen this reported as a freeze, but it's not and just an issue with the display. Perhaps because it fails to detect the proper monitor (mine is an ASUS VS22). I also have an LG monitor, but this has a different problem by returning bad config info (the screen size is reported incorrectly) This occurred when installing the current 18.04 desktop distribution and behaves the same for EFI or BIOS boot. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperVersion: 1.394 CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Thu Jun 21 08:52:56 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Device [8086:3e91] (prog-if 00 [VGA controller]) Subsystem: Gigabyte Technology Co., Ltd Device [1458:d000] LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 13fe:5400 Kingston Technology Company Inc. Bus 001 Device 003: ID 0c45:7605 Microdia Bus 001 Device 002: ID 1bcf:053e Sunplus Innovation Technology Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Gigabyte Technology Co., Ltd. H370M-D3H ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/username.seed boot=casper quiet splash --- SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/13/2018 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F2 dmi.board.asset.tag: Default string dmi.board.name: H370M D3H-CF dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF2:bd02/13/2018:svnGigabyteTechnologyCo.,Ltd.:pnH370M-D3H:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnH370MD3H-CF:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: Default string dmi.product.name: H370M-D3H dmi.product.version: Default string dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1778093/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp