<div dir="ltr"><div><div><div>Hi, </div>As detailed in another mail, my Skylake system freeze when connecting a secondary monitor using DisplayPort (first monitor was HDMI) with Fedora kernel 4.4.6. Now with current drm-intel-nightly it doesn't freeze when I connect the DP monitor but there is in fact no visible reaction at all - the DP-monitor remains black and xrandr shows all DP connectors as disconnected. </div>With drm.debug=0x1e, there is in fact some reaction in the kernel log when the DP-monitor is connected, but it remains offline. This is the full set of logs generated when the DP-cable is inserted: Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_hdmi_detect] Live status not up! Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_get_hpd_pins] hotplug event received, stat 0x00800000, dig 0x10121010, pins 0x00000080 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_hpd_irq_handler] digital hpd port D - long Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_hpd_irq_storm_detect] Received HPD interrupt on PIN 7 - cnt: 0 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_hpd_pulse] got hpd irq on port D - long Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_get_dpcd] DPCD: 12 14 c4 01 01 01 01 81 02 00 06 00 00 00 00 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_get_dpcd] Display Port TPS3 support: source yes, sink yes Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_print_rates] source rates: 162000, 216000, 270000, 324000, 432000, 540000 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_print_rates] sink rates: 162000, 270000, 540000 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_print_rates] common rates: 162000, 270000, 540000 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_probe_oui] Sink OUI: 00e04c Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_probe_oui] Branch OUI: 00e04c Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_probe_mst] Sink is MST capable Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_long_pulse] MST device may have disappeared 1 vs 1 Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_dpcd_access] too many retries, giving up Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_dpcd_access] too many retries, giving up Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_dpcd_access] too many retries, giving up Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_dpcd_access] too many retries, giving up Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_dpcd_access] too many retries, giving up Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_dpcd_access] too many retries, giving up Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_send_sideband_msg] failed to dpcd write 5 -5 Apr 02 20:09:04 UNKNOWN kernel: [drm:process_single_tx_qlock] sideband msg failed to send Apr 02 20:09:04 UNKNOWN kernel: [drm:process_single_down_tx_qlock] failed to send msg in q -5 Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_dp_send_link_address] link address failed -5 Apr 02 20:09:04 UNKNOWN kernel: [drm:i915_hotplug_work_func] running encoder hotplug functions Apr 02 20:09:04 UNKNOWN kernel: [drm:i915_hotplug_work_func] Connector DP-2 (pin 7) received hotplug event. Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_detect] [CONNECTOR:48:DP-2] Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_get_dpcd] DPCD: 12 14 c4 01 01 01 01 81 02 00 06 00 00 00 00 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_get_dpcd] Display Port TPS3 support: source yes, sink yes Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_print_rates] source rates: 162000, 216000, 270000, 324000, 432000, 540000 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_print_rates] sink rates: 162000, 270000, 540000 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_print_rates] common rates: 162000, 270000, 540000 Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_probe_oui] Sink OUI: 00e04c Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_probe_oui] Branch OUI: 00e04c Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_probe_mst] Sink is MST capable Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_dp_long_pulse] MST device may have disappeared 1 vs 1 Apr 02 20:09:04 UNKNOWN kernel: [drm:i915_hotplug_work_func] Connector HDMI-A-3 (pin 7) received hotplug event. Apr 02 20:09:04 UNKNOWN kernel: [drm:intel_hdmi_detect] [CONNECTOR:52:HDMI-A-3] Apr 02 20:09:04 UNKNOWN kernel: [drm:do_gmbus_xfer] GMBUS [i915 gmbus dpd] NAK for addr: 0050 w(1) Apr 02 20:09:04 UNKNOWN kernel: [drm:do_gmbus_xfer] GMBUS [i915 gmbus dpd] NAK on first message, retry Apr 02 20:09:04 UNKNOWN kernel: [drm:do_gmbus_xfer] GMBUS [i915 gmbus dpd] NAK for addr: 0050 w(1) Apr 02 20:09:04 UNKNOWN kernel: [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpd </div>/Oskar </div>