[Bug 81537] [snb dp regression] dp retry forever due to setting sink dpms to OFF

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81537

--- Comment #17 from Adam Skillen <askillen at ccsl.carleton.ca> ---
(In reply to comment #16)
> I'm assuming that with the dongle/secondary display disconnected, this
> problem does not occur? Looking over the code, intel_dp_sink_dpms() just
> enables/disables power in the sink device via the DPCD. So my first
> suspicion is that the dongle isn't behaving, however it could also have
> something to do with how the driver handles branch devices.
> 
> What is the make/model of the dongle?

The dongle is a Dell CN-0JG7P4.

I just tried booting with the dongle disconnected and the error did not occur. 
Furthermore, if I connect the dongle after the system is fully booted, the
error does not seem to occur (I have only tested this on the 3.13 kernel so
far, I'll test the latest mainline shortly).

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