Apologies for the delayed reply. I've done some additional testing, including the Wayland session. Here my findings:
removed .config/monitors.xml and .config/monitors.xml~ unplugged monitor cable, unplugged monitor power shutdown > start-up Set display preferences for single/laptop screen shutdown > start-up plugged in monitor power plugged in monitor to laptop - no change - opened display settings monitor starts up as second screen changed settings as needed for both screens > apply > keep settings second monitor switches off shutdown and restart > second monitor on and with correct settings lock screen > wait for second monitor to go back to sleep -- correct behaviour resumes -- wake screen > both monitors resume as expected suspend machine > resume > both monitors resume as expected -- END-- unplug second monitor > single/laptop display resumes correctly plug second monitor back in, display remains unchanged (laptop/single only) unplug second monitor suspend laptop plug in second monitor resume laptop, second monitor remains off logout login screen displayed with second screen now enabled login display resets to multiple display desktop but second screen remains off remove second screen > display resets correctly to single laptop screen shutdown --- correct behaviour resumes -- plugin in second monitor start both screens active including login login both screens working as expected lock screen > all screens suspend move mouse to active screens > both resume and can login suspend suspend machine > resume > both monitors resume as expected suspend > unplug second monitor > resume > single display/laptop works as expected -- END -- suspend > plugin in second monitor > resume > display remains in "single" mode > second monitor remains off restart gnome-shell (Alt+F2 > r) display resets to correct two display setup with second monitor on lock screen > monitor suspend > move mouse to activate screens > only laptop screen wakes up shutdown --- correct behaviour resumes -- start both screens active including login login both screens working as expected lock screen > all screens suspend move mouse to active screens > both resume and can login suspend suspend machine > resume > both monitors resume as expected END TESTING Wayland --------- setup second display, all working as expected (lock screen and suspend resume work fine) remove second screen > screen resets to single display plug in second screen > no change open display settings > display settings do not recognise second screen logout login screen, both displays work login > both displays working as expected (lock screen and suspend resume work fine) suspend > remove second display > resume single display resets as expected suspend > add second screen > resume second screen remains off, display remains in 'single' display mode. logout login screen, both displays work login > both displays working as expected (lock screen and suspend resume work fine) END WAYLAND TESTING Thanks for the time and effort all. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1886672 Title: Second screen is not always made to awaken when using multiple displays. Desktop is multiple display, but only laptop screen is on while second screen sometimes remains off Status in mutter package in Ubuntu: Incomplete Status in xorg-server package in Ubuntu: Incomplete Bug description: New bug for me. Issue was fine till last week. I think this may be related to the following as it started happening shortly thereafter. I have XPS13 with second monitor, all working fine till I lock screen or suspend. Then my second monitor will not 'resume'. I.e. stays off. This behaviour started after (or shortly after) playing a wine game using Lutris to launch. Shutting game down and almost immediately hitting suspend on the laptop. Was rushing out. It's a wild shot in the dark but I think something got messed up / not saved correctly in this process. To get it working I need to unplug monitor (using USB-C > HDMI) > suspend > plug in monitor > resume and sometimes still need to open display settings before it 'kicks in'. Damn annoying. Hope someone can help :) ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 Uname: Linux 5.4.0-40-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.3 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: GNOME Date: Tue Jul 7 16:44:52 2020 DistUpgraded: 2020-05-15 15:17:42,708 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: focal DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Dell UHD Graphics 620 [1028:082a] InstallationDate: Installed on 2019-01-29 (525 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: Dell Inc. XPS 13 9360 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-40-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to focal on 2020-05-15 (53 days ago) dmi.bios.date: 11/14/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.13.0 dmi.board.name: 0PVG6D dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.13.0:bd11/14/2019:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn0PVG6D:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9360 dmi.product.sku: 082A dmi.sys.vendor: Dell Inc. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.8-0ubuntu1~20.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.1 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1886672/+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
