<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] Intel HD 520 failed to train DP when connected with a external monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=93578#c97">Comment # 97</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] Intel HD 520 failed to train DP when connected with a external monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=93578">bug 93578</a> from <a class="email" href="mailto:elio.martinez.monroy@intel.com" title="Elio <elio.martinez.monroy@intel.com>"> Elio</a> <pre>This topic is really interesting, i was trying to reproduce the issue with a SKL NuC6i7KYK , having the following messages everytime that i connect the USB-C dongle: (03:09 PM) [gfx@gfx-desktop] [~]$ : dmesg | grep xhci_hcd [ 491.597534] xhci_hcd 0000:3c:00.0: remove, state 1 [ 491.598091] xhci_hcd 0000:3c:00.0: Host halt failed, -19 [ 491.598093] xhci_hcd 0000:3c:00.0: Host not accessible, reset failed. [ 491.598094] xhci_hcd 0000:3c:00.0: USB bus 4 deregistered [ 491.598102] xhci_hcd 0000:3c:00.0: remove, state 4 [ 491.598289] xhci_hcd 0000:3c:00.0: USB bus 3 deregistered [ 501.850414] xhci_hcd 0000:3c:00.0: xHCI Host Controller [ 501.850418] xhci_hcd 0000:3c:00.0: new USB bus registered, assigned bus number 3 [ 501.851552] xhci_hcd 0000:3c:00.0: hcc params 0x200077c1 hci version 0x110 quirks 0x00009810 [ 501.852021] xhci_hcd 0000:3c:00.0: xHCI Host Controller [ 501.852024] xhci_hcd 0000:3c:00.0: new USB bus registered, assigned bus number 4 [ 502.180089] usb 4-1: new SuperSpeed USB device number 2 using xhci_hcd Having the following output in xrandr : xrandr Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192 DP-1 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) HDMI-1 disconnected (normal left inverted right x axis y axis) DP-3 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 621mm x 341mm 3840x2160 30.00* 2560x1600 59.97 2560x1440 59.95 1920x1080 60.00 60.00 50.00 59.94 1920x1080i 60.00 50.00 59.94 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1152x864 75.00 1280x720 60.00 50.00 59.94 1440x576 50.00 1024x768 75.03 70.07 60.00 1440x480 60.00 59.94 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x576 50.00 720x480 60.00 59.94 640x480 75.00 72.81 66.67 60.00 59.94 720x400 70.08 HDMI-2 disconnected (normal left inverted right x axis y axis) 848x480 (0x104) 33.750MHz +HSync +VSync h: width 848 start 864 end 976 total 1088 skew 0 clock 31.02KHz v: height 480 start 486 end 494 total 517 clock 60.00Hz Kernel Version: 4.10.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>