Hi Jonathan, you seem to be having several different issues here, so I'll try to address them individually.
First the slow updates, you wrote: "screen updates to the DisplayLink monitor are Extremely Slow. Like I am typing in a terminal window and it sometimes takes a second or two between when I type something and when the results of the typing show up in the terminal. If I move the same terminal window onto the built-in laptop display the lag goes away." Slow updates could be one of two things: either the copying of content to DisplayLink itself is slow, or DisplayLink is showing outdated content. To understand which one it is, you could try running 'glxgears' (or any program that animates continuously and reports fps) on the DisplayLink output and then see if the same slowness with a terminal still happens. If the issue is outdated content, then 'glxgears' by forcing repeated output updates should have the side-effect of making the slowness go away. Also glxgears should report the expected monitor refresh rate as fps (for a 60 Hz monitor I'd expect 58 - 60 fps). Your overall system CPU consumption could be somewhat high, but I would not expect any CPU core to be maxed out. If the issue is bad performance in copying the content, then running glxgears should not make the slowness disappear. Instead, glxgears should report very low fps, and your system CPU usage may or may not be high. It would be interesting to know if you have any CPU cores maxed out busy. In any case, I think we should talk about the slowness in a new bug report. Please, point me to it, if you file one. -- 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
