<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] Sometimes fails to DPMS on" href="https://bugs.freedesktop.org/show_bug.cgi?id=107489#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] Sometimes fails to DPMS on" href="https://bugs.freedesktop.org/show_bug.cgi?id=107489">bug 107489</a> from <a class="email" href="mailto:mattst88@gmail.com" title="Matt Turner <mattst88@gmail.com>"> Matt Turner</a> <pre>Created <a href="attachment.cgi?id=141086" name="attach_141086" title="drm-debug.log.gz">attachment 141086</a> <a href="attachment.cgi?id=141086&action=edit" title="drm-debug.log.gz">[details]</a> drm-debug.log.gz The attached log was captured with drm.debug=0x1e log_buf_len=4M Snippet of relevant part (I think): Aug 14 13:44:32 p50 kernel: [drm:edp_panel_on] Wait for panel power on Aug 14 13:44:32 p50 kernel: [drm:wait_panel_status] mask b000000f value 80000008 status 0000000a control 00000003 Aug 14 13:44:32 p50 kernel: [drm:gen8_de_irq_handler] hotplug event received, stat 0x01000000, dig 0x12101010, pins 0x00000010 Aug 14 13:44:32 p50 kernel: [drm:intel_hpd_irq_handler] digital hpd port A - long Aug 14 13:44:32 p50 kernel: [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 0 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_hpd_pulse] ignoring long hpd on eDP port A Aug 14 13:44:32 p50 kernel: [drm:wait_panel_status] Wait complete Aug 14 13:44:32 p50 kernel: [drm:intel_power_well_enable] enabling DDI A/E IO power well Aug 14 13:44:32 p50 kernel: [drm:edp_panel_vdd_on] Turning eDP port A VDD on Aug 14 13:44:32 p50 kernel: [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL: 0x0000000b Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using signal levels 00000000 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using vswing level 0 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using pre-emphasis level 0 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_program_link_training_pattern] Using DP training pattern TPS1 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_start_link_train] clock recovery OK Aug 14 13:44:32 p50 kernel: [drm:intel_dp_start_link_train] 5.4 Gbps link rate without sink TPS3 support Aug 14 13:44:32 p50 kernel: [drm:intel_dp_program_link_training_pattern] Using DP training pattern TPS2 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using signal levels 08000000 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using vswing level 2 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using pre-emphasis level 1 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using signal levels 08000000 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using vswing level 2 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using pre-emphasis level 1 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using signal levels 08000000 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using vswing level 2 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using pre-emphasis level 1 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using signal levels 08000000 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using vswing level 2 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using pre-emphasis level 1 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using signal levels 08000000 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using vswing level 2 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_set_signal_levels] Using pre-emphasis level 1 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_dump_link_status] ln0_1:0x11 ln2_3:0x11 align:0x0 sink:0x0 adj_req0_1:0x66 adj_req2_3:0x66 Aug 14 13:44:32 p50 kernel: [drm:intel_dp_start_link_train] Channel equalization failed 5 times Aug 14 13:44:32 p50 kernel: [drm:intel_dp_start_link_train] *ERROR* [CONNECTOR:71:eDP-1] Link Training failed at link rate = 540000, lane count = 4</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>