ubuntu-x-swat team mailing list archive

[Bob Hill <680614@xxxxxxxxxxxxxxxxxx>]

On my laptop this problem has been somewhat alleviated by moving the
external VGA display (on the right-hand side of the laptop display) two
pixels to the right, so that the external monitor begins at 1368+0
(instead of 1366+0).  Now there is no vertical stripe overflowing from
the right-hand edge of the laptop display onto the left-hand edge of the
external display, so everything looks clean (possibly because 1368 is a
multiple of four?).  The disadvantage is of course that there is a two-
pixel gap between the two displays, but this is only really a problem if
windows are placed spanning the displays (which I never do).  The
identical problem is encountered on my laptop with Fedora 16 and with
openSUSE 12.1, but NOT with Windows 7 SP1, so it would appear to be a
generic problem with Xorg across various Linux distros.  Here is the
xrandr which alleviates the problem, showing the VGA starting at 1368+0:

Screen 0: minimum 320 x 200, current 2648 x 1024, maximum 8192 x 8192
LVDS connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
   1366x768       60.0*+
   1280x720       59.9  
   1152x768       59.8  
   1024x768      120.1     60.0     59.9  
   960x720       120.0  
   928x696       120.1  
   896x672       120.0  
   800x600       120.0     60.3     59.9     56.2  
   848x480        59.7  
   700x525       120.0  
   720x480        59.7  
   640x512       120.0  
   640x480       120.0     59.9     59.4  
   512x384       120.0  
   400x300       120.6    112.7  
   320x240       120.1  
HDMI-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected 1280x1024+1368+0 (normal left inverted right x axis y axis) 317mm x 254mm
   1280x1024      60.0*+   75.0  
   1280x960       75.0     60.0  
   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

-- 
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which is subscribed to xserver-xorg-video-ati in Ubuntu.
https://bugs.launchpad.net/bugs/680614

Title:
  Position of second monitor wrong in dual monitor setup if first
  monitor is 1366x768

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