Targus usb 3.0 docking station support

I can confirm that the displaylink driver works. I just bought the "Targus ACP71USZ USB 3 Docking Station with HD Video and Power Adapter" and I have installed the drivers (version 1.0.138) as instructed at

http://support.displaylink.com/knowledgebase/articles/615714#ubuntu

Things so far have worked out smoothly in my Ubuntu 15.04 system. Configuration through the gnome system settings has been easy. I have encountered only one minor glitch. The speakers do not work through the docking station. Surprisingly, in the sound settings the Targus microphone input is detected but the output is not. Not a deal breaker, though.

I have the Targus USB 3.0 Dual Video Docking Station, recently purchased. I bought it with a Dell XPS 13 ("Sputnik"), and it works for USB, Ethernet with this Dell Ultrabook.

The sound out does not work (I haven't tested microphone). The video out does not work with the supplied connectors for either the HDMI or DVI ports. I believe that there are some 'code enhancement opportunities' for USB3 video and Ubuntu.

The Dell machine is running 12.04LTS: 3.2.0-29-generic #46+kamal5~DellXPS-Ubuntu SMP Sun Jul 29 18:49:08 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux.

EDIT: DisplayLink now provides drivers for ubuntu here. Last time I checked (several months ago tbh), it worked, but was using quite a lot of CPU.

Displaylink drivers for usb 3.0 is not implemented for linux. See http://www.displaylink.org/forum/showthread.php?t=1748

Especially, an official says they have no plan to release it anytime soon : http://www.displaylink.org/forum/showpost.php?p=8935&postcount=23

But if you have time, participating in making the support for usb2.0 displaylink better might make them change their point of view, see post 35 (can't link here, because not enough rep).

For me :

• ethernet connection : ok
• sound out : ok
• hub usb : ok
• display : not working

Here is my xrandr output:

$ xrandr 
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 294mm x 165mm
   1920x1080      60.0*+   59.9     40.0  
   [...]
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)

It seems to see the display but not the connection !