<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] External VGA monitor not detected after DPMS/second hotplug" href="https://bugs.freedesktop.org/show_bug.cgi?id=99114#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] External VGA monitor not detected after DPMS/second hotplug" href="https://bugs.freedesktop.org/show_bug.cgi?id=99114">bug 99114</a> from <a class="email" href="mailto:imre.deak@intel.com" title="Imre Deak <imre.deak@intel.com>"> Imre Deak</a> <pre>(In reply to David Woodhouse from <a href="show_bug.cgi?id=99114#c12">comment #12</a>) > Sure. That'll take a little while because I've plugged the DP monitor in now > and it's going to crash hard when I unplug it. I'll file that as a separate > bug once I've worked out a serial or USB debug console. Ok, that's a DP/MST output, likely a separate issue. (In reply to David Woodhouse from <a href="show_bug.cgi?id=99114#c13">comment #13</a>) > Created <a href="attachment.cgi?id=128621" name="attach_128621" title="as requested in comment 11">attachment 128621</a> <a href="attachment.cgi?id=128621&action=edit" title="as requested in comment 11">[details]</a> > as requested in <a href="show_bug.cgi?id=99114#c11">comment 11</a> Arg, this didn't do what I expected, xrandr --verbose woke up the display implicitly before reading the connector info. Thanks for your time we'll work on a fix based on all this info. For reference the following would probably do what I wanted (with same 3 patches and CONFIG_DRM_DP_AUX_CHARDEV=y): devn=/dev/$(basename /sys/class/drm/card0-DP-2/drm_dp_aux?) dmesg -c xset dpms force off sleep 2 dmesg -c echo -ne '\x2' | dd of=$devn bs=1 seek=$(( 0x600 )) count=1 dd if=$devn bs=1 skip=$(( 0x600 )) count=1 | od -tx1 dd if=$devn bs=1 skip=$(( 0x0 )) count=16 | od -tx1 dd if=$devn bs=1 skip=$(( 0x200 )) count=1 | od -tx1 dd if=$devn bs=1 skip=$(( 0x80 )) count=1 | od -tx1 dd if=$devn bs=1 skip=$(( 0x80 )) count=16 | od -tx1 dd if=$devn bs=1 skip=$(( 0x600 )) count=1 | od -tx1 sleep 2 dmesg -c</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>