I have bought the plugable uga-2k-a for use on my aptosid (debian sid).
The hardware are a readone card 6570 hd with open source driver with two monitor and another monitor with this adapter.
I have generated the xorg.conf with Xorg --configure that i have modded for try to get an ambient with three monitor on kde.
This is actual xorg.conf http://pastebin.com/NXWiM7wP .
With this i get the monitor connected on ati card working but the monitor with the adapter i get only this http://imgur.com/LTPVm .
I have followed the tutorial on the plugable site for config udev, compling udl,xf-video-udlfb.
I have recompiled the aptosid kernel with few modded config for enable support on fb.
Now i have no idea after two days of test for getting an ambient with three monitor working.