<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - HDMI not working on Skylake with EDID read error" href="https://bugs.freedesktop.org/show_bug.cgi?id=109273#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - HDMI not working on Skylake with EDID read error" href="https://bugs.freedesktop.org/show_bug.cgi?id=109273">bug 109273</a> from <a class="email" href="mailto:jani.saarinen@intel.com" title="Jani Saarinen <jani.saarinen@intel.com>"> Jani Saarinen</a> <pre>hi, Update from Sashank too and similar findings: >From the logs I can see that these 2 devices have different type of adapters: The success case (U757): is a type 2 DP->HDMI [drm_kms_helper]] DP dual mode HDMI ID: DP-HDMI ADAPTOR\004 (err 0) [drm_kms_helper]] DP dual mode adaptor ID: a0 (err 0) [i915]] DP dual mode adaptor (type 2 HDMI) detected (max TMDS clock: 300000 kHz) The failure case (E756): is a Type 1 DP->HDMI [drm_kms_helper]] DP dual mode HDMI ID: DP-HDMI ADAPTOR\004 (err 0) [drm_kms_helper]] DP dual mode adaptor ID: ff (err 0) [i915]] DP dual mode adaptor (type 1 HDMI) detected (max TMDS clock: 165000 kHz) Looks like the type-1 adapter is not responding to i2c-over-aux reads after one power-down, which is causing the detection failure, further causing the display failures.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>