Update: I did a full 17.10 reinstall as last attempt. I can confirm the following symptoms: - When both 4k displays are connected to the docking (displayport MST), UI login screen is already hanging (see earlier screenshot) - When 1 x 4K display is connected it works. When connecting 2nd display after login (using Wayland), the UI is completely hanging
** Summary changed: - Dual 4K monitor via Displayport MST not working (Lenovo Ultra Dock) + UI login invisible / UI hanging when Dual 4K monitor via Displayport MST is connected (Lenovo Ultra Dock) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725455 Title: UI login invisible / UI hanging when Dual 4K monitor via Displayport MST is connected (Lenovo Ultra Dock) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1725455/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
