Sounds like this?... https://gitlab.gnome.org/GNOME/mutter/issues/728
** Also affects: mutter via https://gitlab.gnome.org/GNOME/mutter/issues/728 Importance: Unknown Status: Unknown ** No longer affects: mutter -- 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/1841886 Title: Join Displays failed when using two external monitor of one Full HD and one Ultra HD Status in OEM Priority Project: New Status in OEM Priority Project bionic series: New Status in mutter package in Ubuntu: New Bug description: [Summary] Join Displays failed when using two external monitor of one Full HD and one Ultra HD [Reproduce Steps] 1. Boot into the desktop environment with DELL DOCK - WD19 130W [1]. 2. Connect one Ultra HD (3840x2160) external monitor and one Full HD (1920x1080) external monitor. 3. Press Win+P to switch to Join Displays mode. [Results] Expected: All monitors including the internal monitor can display with Full HD (1920x1080). Actual: The Ultra HD monitor can not display. [Additional Information] 1. Using only Ultra HD (3840x2160) external monitor with internal Full HD (1920x1020) display works fine. 2. Executing the command like `xrandr --output eDP-1 --primary --preferred --output DP-1-1 --preferred --left-of eDP-1 --output DP-1-2 --above eDP-1 --mode 1920x1080 --rate 60` can work. (P.S. DP-1-2 is connected to Ultra HD.) [1] https://www.dellemc.com/resources/en-us/asset/data-sheets/products /electronics-accessories/dell_dock_wd19_130w_spec_sheet.pdf To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1841886/+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
