The problem does not appear to happen under Wayland. I am attaching a zip file containing four sets of the output of the commands you requested spanning the time from before I plugged in the HDMI cable to afterward, waiting long enough to confirm that I was getting black screens rather than the correct behavior after plugging in the cable.
To minimize the content of the zip, I've edited the journal.txt files in all of the sets after the first to remove the logs that were in the previous journal.txt, so if you append all four journal.txt files you will get a complete, consecutive journal. ** Attachment added: "zip file containing logs" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1849484/+attachment/5299735/+files/logs.zip ** Changed in: gnome-shell (Ubuntu) Status: Incomplete => New -- 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/1849484 Title: ultra-wide monitor recognized properly when plugged in only intermittently Status in gnome-shell package in Ubuntu: New Bug description: I have an LG ultra-wide (2560x1080) monitor. Sometimes when I plug it into my laptop, whose screen was working fine before I plugged it in, both screens go black but nothing else happens. I can still see the mouse cursor and move it between the two monitors (sometimes in the correct location configuration I've configured, sometimes not), but nothing is rendered on the screens. Sometimes when I plug the monitor in, it comes on, but the resolution is wrong. Sometimes it is actually recognized and configured correctly. Frequently I have to unplug the monitor and plug it back in three times or more before it is recognized correctly. I wish it just worked right the first time. :-/ ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: gnome-shell 3.34.1-1ubuntu1 ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1 Uname: Linux 5.3.0-19-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu8 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Oct 23 08:34:07 2019 DisplayManager: gdm3 InstallationDate: Installed on 2019-09-12 (40 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) RelatedPackageVersions: mutter-common 3.34.1-1ubuntu1 SourcePackage: gnome-shell UpgradeStatus: Upgraded to eoan on 2019-09-20 (32 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1849484/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

