The best way to determine whether this is kernel related is to test a recent daily trusty live image that has a newer kernel... I think newer images have the xenial kernel on them, so this would be a good way to determine where the problem is. A fair bit changed in pulse between trusty and xenial, and same with the kernel.
Martin, please download the latest daily image from http://cdimage.ubuntu.com/trusty/daily-live, put it onto a bootable device or an optical disk, and boot from it. Try and use the dock's DP/HDMI connection and report back.
The best way to determine whether this is kernel related is to test a recent daily trusty live image that has a newer kernel... I think newer images have the xenial kernel on them, so this would be a good way to determine where the problem is. A fair bit changed in pulse between trusty and xenial, and same with the kernel.
Martin, please download the latest daily image from http:// cdimage. ubuntu. com/trusty/ daily-live, put it onto a bootable device or an optical disk, and boot from it. Try and use the dock's DP/HDMI connection and report back.
Thanks.