[Libdlo] Doublesight Ds-90U display issues on Ubuntu Lucid 10.04.1 LTS

[Craig Inglis]

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: 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 http://git.plugable.com/webdav/udlfb/
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

On Fri, Oct 15, 2010 at 12:58 AM, Bernie Thompson <bernie at plugable.com>wrote:

> Wonderful!
>
> On Thu, Oct 14, 2010 at 9:50 PM, Craig Inglis <craig.inglis at gmail.com>
> 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 <bernie at plugable.com>
> > wrote:
> >>
> >> Hi Craig,
> >>
> >> Two thoughts:
> >>
> >> On Thu, Oct 14, 2010 at 9:00 PM, Craig Inglis <craig.inglis at gmail.com>
> >> 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 http://git.plugable.com/webdav/udlfb/
> >> cd udlfb
> >> make
> >> sudo make install
> >> sudo depmod -a
> >>
> >> Let us know if either of these help.
> >>
> >> Best wishes,
> >> Bernie
> >> http://plugable.com/
> >> _______________________________________________
> >> Libdlo mailing list
> >> Libdlo at lists.freedesktop.org
> >> http://lists.freedesktop.org/mailman/listinfo/libdlo
> >
> >
>
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