[Bug 85924] [hsw DP-to-DVI] DP hot plug fails if booted without Monitor Attached

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85924

--- Comment #53 from Todd Previte <tprevite at gmail.com> ---
The failing VGA dongle is not going through the same path as the other dongles.
The DP->VGA dongle is an active dongle whereas these others are passive. You'll
notice in the logs that this dongle is responding to AUX transactions versus
the other ones which timeout. 

As an initial test, please restart the machine and add the following parameter
to the kernel command line:

i915.disable_power_well=0

Please report here to indicate the results of this test. Also, it might be a
good idea to file a separate bug to track this VGA dongle problem, since it's
an active adapter and not a passive one. 


-T

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