[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 #68 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Jiri Pirko from comment #65)
> I'm now running kernel 4.15.7-300.fc27.x86_64 which includes the mentioned
> fix (" drm/i915/mst: Use MST sideband message transactions for dpms
> control"). The issue is still there. Nothing changed for me.

More fixes in drm-tip. Please retest.

ad260ab32a4d ("drm/i915/dp: Write to SET_POWER dpcd to enable MST hub.")
be1c63c8017b ("drm/i915/dp: Send DPCD ON for MST before phy_up")

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