[Bug 63031] [Intel GM45][i915-kms]: VGA encoder on SDVOB remains blank when i915.ko is loaded while gfx is in text mode.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63031

--- Comment #9 from Egbert Eich <eich at pdx.freedesktop.org> ---
Ok, got a bit further, 
looks like the state of the SDVOB is not consistent:
I do get valid output from SDVO_CMD_GET_ATTACHED_DISPLAYS when
SDVO_CMD_SET_ACTIVE_OUTPUTS is set to 0 prior to reading
SDVO_CMD_GET_ATTACHED_DISPLAYS.

To get valid output with SDVO_CMD_SET_ACTIVE_OUTPUTS set to anything but 0 some
other conditions need to be met also. I have not yet been able to determine
what these are.

In any case, calling encoder->disable() encoder somewhere in sanitize_encoder()
for DAC-11 will get sdvo_detect() to detect the attached display correctly.

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