Incomplete desktop on LVDS when also using external VGA

[Hinko Kocevar]

Hi,

I'm running Xfce that comes with Ubuntu 10.10.
My laptop has 1680x1050 LCD (LVDS1) resolution and my LCD TV (VGA1) has 
1920x1080.

I'm trying to have the same output on both displays, but it does not 
work as expected. It appears that the Xfce desktop is not completely 
seen on LVDS1, but is complete on VGA1. The bottom panel is seen only 
partially, also the right part of the desktop is missing. I would 
suspect that the amount of pixels missing is, difference between LVDS1 
and VGA1 resolutions..

Here are the xrandr lines used in ~/.xprofile that give me correct 
resolution but bad size:

xrandr --output LVDS1 --auto
xrandr --output VGA1 --auto

Similar can be set using grandr tool also.

Has anyone seen this ?

If I don't use ~/.xprofile settings then both LVDS1 and VGA1 have 
resolution 1024x768, blurry output, but Xfce desktop is complete on both 
displays.

Here is output from xrandr:
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 
160mm x 90mm
    1920x1080      60.0*+
    1280x1024      60.0
    1280x720       60.0
    1024x768       60.0
    800x600        60.3
    640x480        60.0     59.9
    720x400        70.1
LVDS1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 
331mm x 207mm
    1680x1050      60.0 +   60.0     59.9
    1600x1024      60.2
    1400x1050      60.0
    1280x1024      60.0
    1440x900       59.9
    1280x960       60.0
    1360x768       59.8     60.0
    1152x864       60.0
    1024x768       60.0*
    800x600        60.3     56.2
    640x480        59.9
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
TV1 disconnected (normal left inverted right x axis y axis)

lspci output for my Video card:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series 
Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)


I'm also attaching Xorg.0.log when both displays are connected and 
activated. With automatic detection I get gdm login screen in 1024x768 
resolution on both displays.

PS. No additional X11 configuration has been added then from Ubuntu 
10.10 stock. Also no xorg.conf is present, X sets things automatically.


Best regards,
Hinko

-- 
Hinko Kocevar
Technical support software engineer
Instrumentation Technologies d.d.
Velika pot 22, SI-5250 Solkan - Slovenia
T:+386 5 3352600, F:+386 5 3352601
mailto: hinko.kocevar at i-tech.si

http://www.i-tech.si - When your users demand stability

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