One err message more (after machdep.allowaperture=2):
drm:pid0:intel_dp_aux_wait_done *ERROR* [drm] *ERROR* AUX C/DDI C/PHY C: did not complete or timeout within 10ms (status 0xa143003f) >Hello, > >Testing a new monitor with speakers connection by a DisplayPort >adapter >to HDMI.. I came to realize the real problem related to these messages >appearing at boot time and dmesg: > >drm:pid38311:drm_dp_dual_mode_detect *ERROR* [drm] *ERROR* Unexpected >DP dual mode adaptor ID 20 > >drm:pid26205:drm_dp_dual_mode_detect *ERROR* >[drm] *ERROR* Unexpected DP dual mode adaptor ID 20 > >..in few words the DP adapter that should pass audio and video >channels >together let pass the video flow only (and indeed I'm able to use my >new screen) but without the audio channel (HDMI cable and connection >tested). > >Hope this is helpful, thanks > > >== Daniele Bonini
