<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Black screen after backlight is off" href="https://bugs.freedesktop.org/show_bug.cgi?id=92878#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Black screen after backlight is off" href="https://bugs.freedesktop.org/show_bug.cgi?id=92878">bug 92878</a> from <a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> Jani Nikula</a> <pre>AFAICT this has nothing to do with backlight. >From the logs: [ 0.900606] [drm:intel_dp_get_dpcd] DPCD: 12 14 84 41 00 00 01 01 02 00 00 00 00 0b 00 [ 0.900903] [drm:intel_dp_get_dpcd] Display Port TPS3 support: source yes, sink no [ 0.901190] [drm:intel_dp_print_rates] source rates: 162000, 270000, 540000 [ 0.901192] [drm:intel_dp_print_rates] sink rates: 162000, 270000, 540000 [ 0.901194] [drm:intel_dp_print_rates] common rates: 162000, 270000, 540000 [ 244.397787] [drm:intel_dp_start_link_train [i915]] *ERROR* 5.4 Gbps link rate without HBR2/TPS3 support The display reports it has DPCD rev 1.2, and supports max link rate of 5.4 Gbps per lane i.e. HBR2. However, it reports it does not support TPS3, even though that support is mandatory for downstream devices that support HBR2. *sigh*</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>