FYI - Its now working nicely with Gnome + Xinerama on my netbook. I can drag windows between screens etc. and everything reverts back to the netbook display if I boot or login without the screen attached. Netbook: Acer as1410 SU2300 CULV (1366x768 Intel 4500MHD) OS: <code></code>Linux AA1 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 GNU/Linux Howto: sudo apt-get install libusb-dev xorg-dev build-essential xserver-xorg-video-displaylink git-core modinfo udlfb # this udlfb does not work well sudo apt-get install module-assistant sudo module-assistant prepare git clone <a href="http://git.plugable.com/webdav/udlfb/" target="_blank">http://git.plugable.com/webdav/udlfb/</a> cd udlfb make sudo make install sudo depmod -a modinfo udlfb # should show the new udlfb version #copy attached xorg.conf to /etc/X11/xorg.conf #check input device paths using info from cat /proc/bus/input/devices # Fix gdm login screen problem... sudo vi /etc/gdm/Init/Default # add following after gdmwhich function... XRANDR=`gdmwhich xrandr` if [ "x$XRANDR" != "x" ] ; then $XRANDR -o 0 fi # Disable kernel modeset (required by udlfb) sudo vi /etc/default/grub # add following to kernel options: vga=normal nomodeset sudo update-grub # then reboot Login using "Gnome Failsafe" window manager. Fluxbox also works without modification. Regular Gnome desktop doesn't work - not sure why - probably gdm issue. xorg.conf is really fussy if you try to tweak it - so best to check you have ssh access before making changes Fussy things: - Displaylink screen must be in ServerLaout before Laptop screen - modeset needs to disabled using grub kernel option - Depth has to be 16bit for all screens for Xinerama to work (needs DefaultDepth) - Lucid no longer supports kbd module - need to use evdev instead - AutoAddDevices needs to be false or it crashes - 9" screen is recognized as 4" NAV device - need to set DisplaySize to avoid huge fonts I didn't have to blacklist any modules or create fbcon.conf and my displaylink screen does not go green during startup - works fine tho. Regards Craig <div class="gmail_quote">On Fri, Oct 15, 2010 at 12:58 AM, Bernie Thompson <<a href="mailto:bernie@plugable.com" target="_blank">bernie@plugable.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Wonderful! <div><div></div><div> On Thu, Oct 14, 2010 at 9:50 PM, Craig Inglis <<a href="mailto:craig.inglis@gmail.com" target="_blank">craig.inglis@gmail.com</a>> wrote: > Hi Bernie, > the new udlfb fixed it! Its working great now. Many Thanks! > > I've attached the xorg.conf I was using. The only custom bit is the > "DisplaySize" setting that I added to stop some apps using huge fonts. It > didn't affect the line issue at all and it may not be necessary with the new > udlfb. > > :-) > > On Fri, Oct 15, 2010 at 12:28 AM, Bernie Thompson <<a href="mailto:bernie@plugable.com" target="_blank">bernie@plugable.com</a>> > wrote: >> >> Hi Craig, >> >> Two thoughts: >> >> On Thu, Oct 14, 2010 at 9:00 PM, Craig Inglis <<a href="mailto:craig.inglis@gmail.com" target="_blank">craig.inglis@gmail.com</a>> >> wrote: >> > (II) DL(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4 >> >> Can you post your xorg.conf? Want to make sure Depth is either not >> specified or set to 16 (udlfb uses 16-bit RGB56) >> >> Also, you might want to try the latest udlfb (this is the effectively >> the version in kernel 2.6.37, but has been carefully ifdef'd to >> compile for older kernels). >> >> sudo apt-get install module-assistant >> sudo module-assistant prepare >> git clone <a href="http://git.plugable.com/webdav/udlfb/" target="_blank">http://git.plugable.com/webdav/udlfb/</a> >> cd udlfb >> make >> sudo make install >> sudo depmod -a >> >> Let us know if either of these help. >> >> Best wishes, >> Bernie >> <a href="http://plugable.com/" target="_blank">http://plugable.com/</a> >> _______________________________________________ >> Libdlo mailing list >> <a href="mailto:Libdlo@lists.freedesktop.org" target="_blank">Libdlo@lists.freedesktop.org</a> >> <a href="http://lists.freedesktop.org/mailman/listinfo/libdlo" target="_blank">http://lists.freedesktop.org/mailman/listinfo/libdlo</a> > > </div></div></blockquote></div>