A user reports it working on Ubuntu 9.04 after compiling some packages: http://mulchman.org/blog/?tag=displaylink
edit: apt-cache search displaylink returns xserver-xorg-video-displaylink - X driver for DisplayLink devices...it wouldn't be included if it didn't work. It might not support ALL resolutions, but I think it more than satisfies will it work.
edit: I would try pasting this section into you xorg configuration:
Option "fbdev" "/dev/fb1"
Even with the windows drivers not all resolutions are supported across all chipsets.
another point worth noting is that in some configurations it has been noted that the DVI dongle doesn't function appropriately
okay maybe i found it: http://lists.freedesktop.org/archives/libdlo/2010-November/000807.html
The most interesting thing is that I found out why I can use the
displaylink driver together with nvidia but not the fbdev driver.
This is just an explicit check (xf86Bus.c, xf86PostProbe()) whether both
framebuffer and pci devices have been claimed, if so the server refuses
The displaylink driver just clears the corresponding fbSlotClaimed flag,
no more magic required. But, there is another (similar) check in
xf86ClaimFbSlot() (xf86fbBus.c) that, when claiming a frambuffer slot,
makes sure no PCI slot has been allocated, I guess thats the reason why
the displaylink driven device must be registered first (as primary screen).
On another thread the green screen problem is attributed to using DirectFB
discussion here: http://web.archiveorange.com/archive/v/BNQl8iH957oQe619QVek
they indicate that it worked, if slowly. but the box in question was a 266MHz monster so...