[Bug 88124] i915: regression: after DP connected 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 #14 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Jiri Pirko from comment #13)
> There's a debug dmesg output already attached to this BZ. Isn't that enough?

Please run a recent (v4.10-rcN or drm-tip) kernel and attach dmesg all the way
from boot to reproducing the issue, with drm.debug=14 module parameter set.

> This is trivial to reproduce. Am I the only one experiencing this issue?
> This is clearly a regression between 3.16 and 3.17. Having this issue on
> multiple laptops, multiple displays, multiple kernels.

Bisect early on would have been great, perhaps it would still help, but I doubt
we can revert anything such old stuff.

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