[Bug 88124] i915: regression: after DP connected (via docking station) monitor is turned off, when turned on, it does not work anymore

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88124

--- Comment #44 from Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com> ---
I tried the same experiment with a  Lenovo x260 + Lenovo dock. There was no
interrupt (short or long pulse) when I turned off the monitor connected to the
dock. The display comes up fine after I turn it on.

But, with Jiri's configuration, the dock seems to send a long pulse indicating
a dock unplug. Therefore, the connectors get destroyed. I don't think the
kernel is doing anything wrong here. We'll need more debug information to
confirm that the userspace isn't able to deal with new connectors.

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