Bug 492360

Description of problem:

I'm doing the Nouveau QA day "multihead" test case.

The internal monitor I have is connected via LVDS and is capable of 1920x1200. The external monitor is connected to the VGA out on my laptop, and is capable of 1680x1050. xrandr gets both of these things right:

Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1920 x 1920
LVDS-0 connected (normal left inverted right x axis y axis)
   1920x1200      60.0 +
VGA-1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 470mm x 300mm
   1680x1050      60.0*    59.9  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1280x960       60.0  
   1152x864       75.0  
   1280x720       60.0  
   1024x768       75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     59.9  
   720x400        70.1  
DVI-2 disconnected (normal left inverted right x axis y axis)

Now, I'm using the Display application to try to mess around with the configuration. What works:

* having one specific output turned on, and the other off - the correct output is used, and the native resolution is achieved.

And that's about it :(

* mirror displays - doesn't work. I tried this a number of ways, including doing it from the lower resolution external display first, but turning on both outputs and doing "mirror" nets me "could not find a suitable configuration of screens"

* non-mirror displays - also doesn't work. Doesn't matter whether one is in front of / behind / on top of / etc. the other; I get the same pop-up: "Could not apply the selected configuration" - "required virtual size does not fit available size: requested=(1920,2250), minimum=(320,200), maximum=(1920,1920)"

I had a look in various logs; nothing relevant seemed to be around. Let me know if there's any further testing I can do on these.