Re: problem setting up extended desktop

[Joost Ringoot <Joost.Ringoot@kmi.be>]

  Maybe this issue was not related to this list.
Anyway, the problem was due to a bug in Xorg.
And has very recently been fixed in the in the GIT repository (I 
installed it via https://launchpad.net/~xorg-edgers/+archive/ppa)
https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/619663

On 01/10/10 09:36, Joost Ringoot wrote:
>  Hello all,
>
> Prequel: I have a Latitude D620 laptop. With Ubuntu.
> I have successfully used  an extended desktop with different screens (
> a HDMI Dell 19"  at office via docking, and a VGA 17" (noname) at home)
>
> I had an issue not related to this with the graphics, for which I
> don't expect any feedback from this group, it is just  to illustrate
> the circumstances:
> When I clicked  with the right mouse button on a node in XCDP
> (http://www.ecmwf.int/products/data/software/sms.html) The GUI session
> hanged, untill I went to console (CTRL+ALT+F1) and terminated XCDP or
> its parent shell.
> This problem appeared to be generel for Ubuntu 10.04 local installs...
> Yes curiously enough, this was not an issue for remote X-sessions.
> A colleague installed ubuntu 10.10 and told me the issue with XCDP was
> resolved after this upgrade.
> So I performed the upgrade on my laptop and found also that the
> problem with XCDP was resolved.
>
> Alas I am no longer able to use extended desktop, "mirrored  screens"
> setup does work however.
> I was looking in the Ubuntu forums for help and left a message there a
> couple days ago, no answer yet.
> Maybe any of you can help.
> A clean solution would be nice but any help to get me more insight on
> why this happens or were to go with troubleshooting is welcome.
>
>
> I first tried with the "Monitors" configuration tool of ubuntu, but
> this just fails without any error output.
> I then tried arandr, this fails with this output:
> XRandR failed:
> XRandR returned error code 1: X Error of failed request:  BadMatch
> (invalid parameter attributes)
>   Major opcode of failed request:  150 (RANDR)
>   Minor opcode of failed request:  7 (RRSetScreenSize)
>   Serial number of failed request:  32
>   Current serial number in output stream:  33
>
> On the website http://intellinuxgraphics.org I found some more info
> and tried the following without much success.
>
> root@legolas:~# uname -a
> Linux legolas 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC
> 2010 i686 GNU/Linux
> root@legolas:~# lshw | grep -i graphic
>              product: Mobile 945GM/GMS, 943/940GML Express Integrated
> Graphics Controller
>              product: Mobile 945GM/GMS/GME, 943/940GML Express
> Integrated Graphics Controller
> root@legolas:~# xrandr -q
> Screen 0: minimum 320 x 200, current 1440 x 900, maximum 4096 x 4096
> VGA1 connected 1440x900+0+0 (normal left inverted right x axis y axis)
> 408mm x 255mm
>    1440x900       59.9 +   75.0*
>    1280x1024      75.0     60.0
>    1280x800       59.8
>    1152x864       75.0
>    1024x768       75.1     70.1     60.0
>    832x624        74.6
>    800x600        72.2     75.0     60.3     56.2
>    640x480        72.8     75.0     66.7     60.0
>    720x400        70.1
> LVDS1 connected 1440x900+0+0 (normal left inverted right x axis y
> axis) 303mm x 190mm
>    1440x900       60.0*+   59.9
>    1360x768       59.8     60.0
>    1152x864       60.0
>    1024x768       60.0
>    800x600        60.3     56.2
>    640x480        59.9
> DVI1 disconnected (normal left inverted right x axis y axis)
> TV1 disconnected (normal left inverted right x axis y axis)
> root@legolas:~# xrandr --output VGA1 --left-of LVDS1
> X Error of failed request:  BadMatch (invalid parameter attributes)
>   Major opcode of failed request:  150 (RANDR)
>   Minor opcode of failed request:  7 (RRSetScreenSize)
>   Serial number of failed request:  32
>   Current serial number in output stream:  33
> root@legolas:~#
>
> Thanks,
>
>
> Joost Ringoot