[Bug 75401] When laptop monitor is turned off it periodically turns on for a fraction of a second

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75401

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #3)
> Yes, you are right. As you can see from dmesg output, your patch completely
> prevents the flash and hotplug event. However, I don't understand why it
> increases the power consumption when the screen is off.

With the patch, we don't fully turn off all power to the screen instead the
communication channel is kept alive. The remaining question is who is at fault,
our code or the panel? If the panel, we may just quirk your machine to never
disable the VDD line as above - otherwise we may have an incorrect sequence
somewhere for controlling the panel power.

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