[Bug 87319] Dock with builtin DP/VGA "dongle" fails cycling through modes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87319

--- Comment #15 from Gary Wang <gary.c.wang at intel.com> ---
Correct typo, sorry!

@Phidias,
It seems hotplug event is only recovered by un-dock & dock again (hard reset),
and to be possible related to HW signal for generating event.

I got the test result from Canonical about using Ubuntu 14.04 & output display
through docking tests (please correct if something is wrong here)
Pass: DP-port <-> Synaptic-DP-hub <-> DP EFP
Pass: DP-port <-> Synaptic-DP-hub <-> external DP to VGA dongle <-> VGA EFP
Failed: DP-port <-> Synaptic-DP-hub + built-in DP to VGA dongle <-> VGA EFP

Can you help coordinate to measure the HW signal is correct or not in points of
DP-port and Synaptic-DP-hub  (input/output) when issue happened? This is
important for debugging in graphic driver further.

Thanks!

Gary

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