** Summary changed:
- UI login invisible / UI hanging when Dual 4K monitor via Displayport MST is
connected (Lenovo Ultra Dock)
+ Login screen invisible / UI hanging when both 4K monitors connected via
Displayport MST (docking station)
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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
** Tags added: displayport multimonitor
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https://bugs.launchpad.net/bugs/1725455
Title:
Dual 4K monitor via Displayport MST not working (Lenovo Ultra Dock)
Sta
Public bug reported:
I am experiencing serious issues after upgrading to Ubuntu 17.10 (coming
from 17.04 with Gnome, kernel 4.13).
I have 2 x 4K (Asus PB279Q) monitors, connected to a Lenovo Ultra Dock
(containing 2 x Displayport via MST), where the Lenovo T550 is
connected onto it. Both monito
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