[Bug 91845] [HSW]i915 does 2s long DP-link-reset (backlight off) during modeset instead of re-using SimpleFB, stacktrace with i915.fastboot=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91845

--- Comment #18 from o.freyermuth at googlemail.com ---
I understand, yes, that matches observation. 
Still: Why is the panel toggled at all? 
Shouldn't it be possible to just take over the efifb? 
It seems a full reinitialization is taking place, and the panel toggling is
just part of that.

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