Created attachment 712530 [details]
Full Xorg.0.log from a session where the VGA gets detected as connected

Description of problem:
My laptop has a VGA output that is not connected to anything.

With kernel-3.8.3-201.fc18.x86_64, X seems to think that the VGA output is connected to something that is limited to a 1024x768 resolution. The default seems to be to clone the picture to all outputs, so also the actual existing laptop display gets limited to 1024x768 resolution instead of its native 1366x768 resolution. In virtual terminals (the ones you can access with ctrl+alt+FN keys) the laptop display still seems to use the native resolution.

With kernel-3.8.2-206.fc18.x86_64, or with any older Fedora kernel that I have used with this laptop since Fedora 15, this does not happen.

Version-Release number of selected component (if applicable):
xorg-x11-drv-intel-2.21.4-1.fc18.x86_64
kernel-3.8.3-201.fc18.x86_64

How reproducible:
Always with my current configuration and hardware. Likely hardware specific.

Steps to Reproduce:
1. Boot with kernel-3.8.3-201.fc18.x86_64
2. Start X
3. Check the resolution.
  
Actual results:
The laptop starts up otherwise normally, but GDM and my eventual X session is shown in just part of the display, due to X sticking with a reduced resolution.

xrandr output looks like this:

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768       60.0 +   50.0  
   1024x768       60.0* 
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0* 
   800x600        60.3     56.2  
   848x480        60.0  
   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)


Expected results:
X starts with the native laptop display resolution and the VGA output is correctly detected as disconnected. xrandr output would look like how it does when I boot with the older kernel-3.8.2-206.fc18.x86_64:

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768       60.0*+   50.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
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)