<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [HSW] i915 doesn't enable DP-2 on MacBook 11,1 (Retina, Intel Only, Late 2013 / Mid 2014)" href="https://bugs.freedesktop.org/show_bug.cgi?id=89271#c23">Comment # 23</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [HSW] i915 doesn't enable DP-2 on MacBook 11,1 (Retina, Intel Only, Late 2013 / Mid 2014)" href="https://bugs.freedesktop.org/show_bug.cgi?id=89271">bug 89271</a> from <a class="email" href="mailto:hyperair@gmail.com" title="Chow Loong Jin <hyperair@gmail.com>"> Chow Loong Jin</a> <pre>Created <a href="attachment.cgi?id=134561" name="attach_134561" title="dmesg without drm.debug=14 and before/after hotplug thunderbolt dumps">attachment 134561</a> <a href="attachment.cgi?id=134561&action=edit" title="dmesg without drm.debug=14 and before/after hotplug thunderbolt dumps">[details]</a> dmesg without drm.debug=14 and before/after hotplug thunderbolt dumps I have one eDP-1 and one DP-1. When booted with the monitor plugged in, it works and both /sys/class/drm/card0-eDP-1/enabled and /sys/class/drm/card0-DP-1/enabled show "enabled". After unplugging it and plugging it back in, only /sys/class/drm/card0-eDP-1/enabled shows up, and it's impossible to bring back the external display without rebooting. While examining the thunderbolt dump in dmesg from a booting up event and after replugging it, I noticed that two DP/HDMI ports are missing in the latter dump: [ 28.716581] thunderbolt 0000:07:00.0: Port 11: 8086:156d (Revision: 0, TB Version: 1, Type: DP/HDMI (0xe0101)) [ 28.716582] thunderbolt 0000:07:00.0: Max hop id (in/out): 9/9 [ 28.716583] thunderbolt 0000:07:00.0: Max counters: 2 [ 28.716584] thunderbolt 0000:07:00.0: NFC Credits: 0xf0000b [ 28.716602] thunderbolt 0000:07:00.0: Port 12: 8086:156d (Revision: 0, TB Version: 1, Type: DP/HDMI (0xe0101)) [ 28.716603] thunderbolt 0000:07:00.0: Max hop id (in/out): 9/9 [ 28.716603] thunderbolt 0000:07:00.0: Max counters: 2 [ 28.716604] thunderbolt 0000:07:00.0: NFC Credits: 0xf00000</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>