I tested with a Dell D3100 dock and two monitors connected to the dock via HDMI in addition to laptop built-in screen. I did this on Ubuntu 19.10 with the libmutter fix from eoan-proposed (libmutter-5-0 package version 3.34.3-1ubuntu1~19.10.1).
I tried unplugging and hotplugging each HDMI cable individually and together. I tried hotplugging and unplugging the dock itself (USB). I tried booting with the dock connected, and booting with the dock disconnected then hotplugged. With all three monitors on, I left one glxgears running on one DisplayLink output and the laptop screen each, and a terminal printing the fps on the other DL output for 10 minutes. Then I changed the refresh rate of one DL output to 50 Hz and the other DL output to 75 Hz, confirmed from the monitors themselves to actually run with those refresh rates, and left things running for a couple of minutes more. (Everything defaulted to 60 Hz before.) I was unable to reproduce any kind of freeze. However, I did notice that with three monitors, gnome-control-center Display settings is crash-happy if any monitor was disabled. But that is off-topic here, because even that did not cause anything to freeze. I did also observe the "outdated content" issue I referred to in my earlier comment here. That should be fixed in EVDI kernel module once DisplayLink releases an update. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1853357 Title: display (whole computer?) hangs when I attempt to use DisplayLink with Wayland Status in Mutter: New Status in mutter package in Ubuntu: Incomplete Status in mutter source package in Eoan: Confirmed Status in mutter source package in Focal: Incomplete Bug description: [ Impact ] I am using the DisplayLink driver for Ubuntu provided at https://www.displaylink.com/downloads/ubuntu DisplayLink is working under Xorg, but when I try to use it under Wayland my whole display hangs and I can't even switch to a different VT with Ctrl-Alt-F3 so I think maybe the whole computer is hung? Not certain. [ Test case ] - Install DisplayLink drivers - Start GNOME Shell in wayland mode - Connect to a display-link dock - Expect the shell to work properly and be visible in the external device [ Regression potential ] Wayland session won't work even for standard drm devices ---- I am using the DisplayLink driver for Ubuntu provided at https://www.displaylink.com/downloads/ubuntu, which I think is the only way to get DisplayLink fully working under Ubuntu? That is, DisplayLink didn't work when I installed the evdi-dkms and libevdi0 Ubuntu packages, and I couldn't find any other packages that might be relevant (did I miss something?) so as far as I can tell the only way to get everything that's needed is from displaylink.com. I'm reporting this issue while logged in under Xorg because I can't report it when logged in with my DisplayLink monitors plugged in under Wayland, for obvious reasons. :-/ ProblemType: BugDistroRelease: Ubuntu 19.10 Package: mutter 3.34.1-1ubuntu1 ProcVersionSignature: Ubuntu 5.3.0-23.25-generic 5.3.7 Uname: Linux 5.3.0-23-generic x86_64 ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Nov 20 14:08:21 2019 InstallationDate: Installed on 2019-09-12 (69 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)SourcePackage: mutter UpgradeStatus: Upgraded to eoan on 2019-09-20 (61 days ago) modified.conffile..etc.apport.crashdb.conf: [modified] mtime.conffile..etc.apport.crashdb.conf: 2019-10-23T16:51:18.143596 To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1853357/+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
