I am VERY interested in continuing work on this. I'm now running 19.04 and the problem persists. I cannot change the status so please update it.
There has been a long running discussion on the Xfce buglist which you can review here: https://bugzilla.xfce.org/show_bug.cgi?id=15116 The problem seems to be that the move to gtk3 is the source of the condition as it has dropped support for multiple monitors. Olivier Fourdan is maintaining xfwm4 and he has apparently done something internally that allows X11-aware applications to be launched on a separate display (:0.1) in addition to the native display (:0.0), but none of the other Xfce components such as the panel, desktop, etc have the ability to run more than one instance on the main display. In this forum discussion: https://forum.xfce.org/viewtopic.php?pid=50336#p50336 member gert pointed to this patch in the gtk3 repository that seems to indicate that multi-screen support has been added back into the toolkit. https://github.com/xfce- mirror/xfwm4/commit/b52c2f5b740434803342c471d4dcb5dd62eb99a1 However, this patched version of gtk has not yet made it into a Ubuntu distribution. Losing multi-headed independent desktop support has been a terrible step backwards for Ubuntu. Please look into this more closely and make sure that the 19.10 release gets the tools required to get this capability restored. I'll provide additional info if necessary. However, as an end0user in this arena, I don't have more insights into the interactions of the display components making up the various desktop environments. On a couple of other forums, I asked whether there was another flavor of Ubuntu that was properly supporting multiple screens. I received zero replies. Multiple independent desktops is critical (as opposed to Xinerama mode) so that material can be displayed statically on one display while changing workspaces on the other screen. ** Bug watch added: Xfce Bugzilla #15116 https://bugzilla.xfce.org/show_bug.cgi?id=15116 -- 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/1822181 Title: Ubuntu 18.10 broke dual-screen dual-desktop configuration Status in xorg-server package in Ubuntu: Won't Fix Bug description: I'm running Xubuntu. I finally reported this problem to the Xfce group and received this response: "As arandr/xrandr does not detect correctly your 2nd screen, this seems that it is not related directly to Xfce, but a bug in Xubuntu stack. Can you please open a bug on Xubuntu project if the issue is still present for you?" Thus this bug report. I've been running Xubuntu for years with two monitors, each running an independent xfce4 desktop -- i.e., configured without Xinerama. This has worked fine for every upgrade through 18.04. When upgrading to 18.10, something significant changed and the the second monitor (display :0.1) was disabled. After much reading and work, I have only been able to restore some extremely hobbled functionality. I am unable to get a second xfce4-desktop, panel or window manager running on the second screen. I have assembled detailed screenshots and command output at the following link: http://smallthoughts.com/xfce/xfce.html I'm using an NVIDIA Quadro K-4000 graphics card and no hardware changes were made between 18.04 and 18.10. The nvidia-settings tool reports both monitors active (as configured in /etc/X11/xorg.conf) but the xfce4-display-settings and aarandr tools each show only one display (although xrandr can be forced to report on the second display. See full documentation at the above link.) What changed in the latest release, and what needs to be done to get the second monitor running a second desktop once again? I have been struggling with this for many months now and it has severely impacted the use of my system. As a new release of Ubuntu in coming, I would appreciate it if this could be prioritized and addressed as quickly as possible. I will provide additional information upon request. P.S.: There is really no documentation available on running multiple desktops on separate screens when Xinerama is not used to tie the screens together into a single desktop. This is a common configuration and I would like to request that as part of the solution to this problem, the setup steps be documented and this multi-desktop configuration be made a standard part of the development and testing process for each Ubuntu release. 13-> lsb_release -rd Description: Ubuntu 18.10 Release: 18.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1822181/+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
