I'm running with a Thinkpad T440s and ultra dock with hdmi<->hdmi. In my case if I dock when hdmi is connected to the dock, the mouse and keyboard freeze once connected. When I undock they unfreeze. If I dock when hdmi is not connected to the dock, the mouse and keyboard don't freeze.
This bug report looks to be for the same issue: /bugs.freedeskt op.org/ show_bug. cgi?id= 71267
https:/
I came across the above bug report here: /bbs.archlinux. org/viewtopic. php?pid= 1374408
https:/
I'm running with a Thinkpad T440s and ultra dock with hdmi<->hdmi. In my case if I dock when hdmi is connected to the dock, the mouse and keyboard freeze once connected. When I undock they unfreeze. If I dock when hdmi is not connected to the dock, the mouse and keyboard don't freeze.
Ubuntu release: 14.04 Trusty Tahr (development branch)