<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [snb DP-to-DVI dongle] miniDP to external monitor with DVI-D via miniDP to DVI-D adapter and blank screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=106596#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [snb DP-to-DVI dongle] miniDP to external monitor with DVI-D via miniDP to DVI-D adapter and blank screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=106596">bug 106596</a> from <a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> Jani Nikula</a> <pre>From logs [ 1.854035] [drm:intel_dp_detect [i915]] [CONNECTOR:63:DP-1] [ 1.854896] [drm:intel_dp_read_dpcd [i915]] DPCD: 11 0a 82 01 01 05 01 81 00 01 04 01 0f 00 00 [ 1.855591] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:63:DP-1] status updated from unknown to disconnected [ 1.855595] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:63:DP-1] disconnected we can read the DPCD but we decide nothing's there after all. Would be great to be able to get the sink count from the dongle. Do you have CONFIG_DRM_DP_AUX_CHARDEV=y? i.e. do you have /dev/drm_dp_auxN devices, N is 0-based number? What does this output: # dd if=/dev/drm_dp_aux0 bs=1 skip=$((0x200)) count=1 | od -tx1</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> </ul> </body> </html>