<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - miniDP to external monitor with DVI-D via miniDP to HDMI/DVI-D/DP adapter : DP dual mode HDMI ID: (err -6) and blank screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=105891#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - miniDP to external monitor with DVI-D via miniDP to HDMI/DVI-D/DP adapter : DP dual mode HDMI ID: (err -6) and blank screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=105891">bug 105891</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>Somehow the entire dongle seems to disappear when you plug it into the bad monitor. That's causing the drm_dp_dual_mode_detect() difference. Also it seems to affect the DP AUX channel somehow as the timeouts that I would expect to see are no longer there. So my theory is that somehow the dongle does not detect your bad monitor and defaults into some kind of DP passthrough mode instead. The dongle has a DP output also right? That could perhaps explain why nothing is detected, and also why no picture goes through when you override the EDID. Did you try different cables between the dongle and the display? Also trying both the DVI and HDMI oputputs of the dongle is worth a shot. And if the monitor has multiple DVI/HDMI inputs you should also try all of them. If none of that helps then I'm afraid it looks like you need to either get another dongle, or another display.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>