<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [SKL][DP] HP Lap Dock external display with DisplayPort over USB Type-C input not properly detected" href="https://bugs.freedesktop.org/show_bug.cgi?id=104054#c40">Comment # 40</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [SKL][DP] HP Lap Dock external display with DisplayPort over USB Type-C input not properly detected" href="https://bugs.freedesktop.org/show_bug.cgi?id=104054">bug 104054</a> from <a class="email" href="mailto:rodrigo.vivi@gmail.com" title="Rodrigo Vivi <rodrigo.vivi@gmail.com>"> Rodrigo Vivi</a> <pre> One thing that is strange is that it seems that there is a hotplug in the middle of modeset that is working correctly. Link train happens etc, but the is a point with another hotplug. Anyway, Could you please use intel gpu tool to check $ sudo intel_reg read 0xc2014 also it is good: $ sudo intel_reg dump and also please $ sudo cat /sys/kernel/debug/dri/0/i915_display_info ----- There is another thing really strange on the log. At first sight I thought a PSR related message along to DP-1 was just a pollution on our log, than when I was going to only print PSR msg if eDP I noticed that our flow is already protected so this PSR related message shouldn't be here: Aug 26 11:30:38 latitude-7275 kernel: [ 27.817517] [drm:intel_atomic_check [i915]] [CONNECTOR:78:DP-1] checking for sink bpp constrains Aug 26 11:30:38 latitude-7275 kernel: [ 27.817633] [drm:intel_atomic_check [i915]] clamping display bpp (was 36) to EDID reported max of 24 Aug 26 11:30:38 latitude-7275 kernel: [ 27.817749] [drm:intel_dp_compute_config [i915]] DP link computation with max lane count 1 max rate 540000 max bpp 24 pixel clock 148500KHz Aug 26 11:30:38 latitude-7275 kernel: [ 27.817851] [drm:intel_dp_compute_config [i915]] DP lane count 1 clock 540000 bpp 24 Aug 26 11:30:38 latitude-7275 kernel: [ 27.817958] [drm:intel_dp_compute_config [i915]] DP link rate required 445500 available 540000 Aug 26 11:30:38 latitude-7275 kernel: [ 27.818056] [drm:intel_dp_compute_config [i915]] PSR disable by flag</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>