<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Sometimes does not detect 60Hz Full HD mode for external display, switching to 60 Hz with interlace" href="https://bugs.freedesktop.org/show_bug.cgi?id=104934#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Sometimes does not detect 60Hz Full HD mode for external display, switching to 60 Hz with interlace" href="https://bugs.freedesktop.org/show_bug.cgi?id=104934">bug 104934</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>[ 6.553805] [drm:intel_dp_start_link_train [i915]] [CONNECTOR:69:DP-2] Link Training failed at link rate = 162000, lane count = 4 [ 6.816030] [drm:intel_dp_start_link_train [i915]] [CONNECTOR:69:DP-2] Link Training failed at link rate = 270000, lane count = 2 etc. So the link appears to be somewhat marginal, sometimes it succeeds in training sometimes not. When it fails we drop it down to 2 x 1.62 Gbps, which means there isn't quite enough bandwidth for 1080p60. Unfortunately I don't have a good theory as to why it would be flaky after boot but then somehow keep working if the cable is swapped to the other port.</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>