<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Dock with builtin DP/VGA "dongle" fails cycling through modes" href="https://bugs.freedesktop.org/show_bug.cgi?id=87319#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Dock with builtin DP/VGA "dongle" fails cycling through modes" href="https://bugs.freedesktop.org/show_bug.cgi?id=87319">bug 87319</a> from <a class="email" href="mailto:gary.c.wang@intel.com" title="Gary Wang <gary.c.wang@intel.com>"> Gary Wang</a> <pre>@Phidias, It seems hotplug event is only recovered by un-dock & dock again (hard reset), and to be possible related HW single to generate 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</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>