[Intel-gfx] VGA port is dead on Arrandale chipset

[Thomas Bächler]

I am using Linux 2.6.33 and xf86-video-intel 2.10 with latest mesa and
libdrm on a Core i5-520M (Xorg.0.log: Chipset "Arrandale").

The xrandr output is as follows by default:

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis)
0mm x 0mm
   1366x768       60.2*+
   1024x768       85.0     75.0     70.1     60.0
   832x624        74.6
   800x600        85.1     72.2     75.0     60.3     56.2
   640x480        85.0     72.8     75.0     59.9
   720x400        85.0
   640x400        85.1
   640x350        85.1
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)

Enabling the VGA1 port seems to work just fine: Resolutions are properly
detected and the desktop is adjusted, xrandr shows VGA1 as active
afterwards. However, there is no picture, the screen stays dead (as in
"no signal"). HDMI2 and DP2 seem to work fine as far as I can see.
What's going on here?

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