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

Sun Oct 17 19:37:47 PDT 2010

Quick update/correction:

Gnome (without failsafe) does work - its compiz that has issues and crashes:
$ gnome-wm
WARNING: Application calling GLX 1.3 function "glXCreatePixmap" when GLX 1.3
is not supported!  This is an application bug!
miptree doesn't match image
compiz: intel_regions.c:400: intel_region_copy: Assertion `src->cpp ==
dst->cpp' failed.
Aborted

Not sure whats going on there - might be due to windows/icons with offscreen
coordinates.

Switching to metacity seems to be a simple fix:
$ gconftool --type string --set
/desktop/gnome/session/required_components/windowmanager metacity

In my previous post I mentioned that I added kernel options "vga=normal
nomodeset" to /etc/default/grub. I actually added just "nomodeset" - the
actual line is:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"

I think this might be important given how fussy the configuration is.

There are a couple of other oddities Ive noticed:

* Suspend/resume & screen power management dont work (hangs) - you need to
disable these in  System > Preferences > Power Management
* nm-applet & blueman applet dont like 16-bit color - they work fine but the
icons are in inverse video
* Gnome panel hide scrolls the panel onto the other screen rather than
hiding it - probably a generic dual screen issue
* the displaylink screen does turn green on startup but only for a very
short period (sub-second flash)

Currently no significant issues outstanding that I know of.

On Sat, Oct 16, 2010 at 7:09 PM, Craig Inglis <craig.inglis at gmail.com>wrote:

> 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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