[Bug 109522] drm:intel_dp_start_link_train [i915] *ERROR* failed to enable link training

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Jun 26 19:26:01 UTC 2019


https://bugs.freedesktop.org/show_bug.cgi?id=109522

--- Comment #26 from howaboutsynergy at pm.me ---
> Apart from from the log messages, is there any other impact?

Yes, xrandr will report(until reboot, apparently) that link-status is Bad
(previously, was Good) as soon as this issue happens once in the current
session/boot.

and file contents of
/home/user/.config/xfce4/xfconf/xfce-perchannel-xml/displays.xml
change from:
-      <property name="Active" type="bool" value="true"/>
to
+      <property name="Active" type="bool" value="false"/>

in context:
    <property name="DP-1" type="string" value="LG 27"">
      <property name="Active" type="bool" value="false"/>                       
      <property name="EDID" type="string"
value="0fd458f22dac5decf2a8543c7190b329e7cf113c"/>
      <property name="Resolution" type="string" value="3840x2160"/>
      <property name="RefreshRate" type="double" value="59.996625"/>
      <property name="Rotation" type="int" value="0"/>
      <property name="Reflection" type="string" value="0"/>
      <property name="Primary" type="bool" value="true"/>
      <property name="Position" type="empty">
        <property name="X" type="int" value="0"/>
        <property name="Y" type="int" value="0"/>
      </property>
    </property>


Here's full xrandr output for the aforementioned `link-status: Bad`:
$ xrandr --verbose
Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192
DP-1 connected 3840x2160+0+0 (0x47) normal (normal left inverted right x axis y
axis) 600mm x 340mm
        Identifier: 0x42
        Timestamp:  372563
        Subpixel:   unknown
        Gamma:      1.0:1.0:1.0
        Brightness: 1.0
        Clones:     HDMI-1
        CRTC:       0
        CRTCs:      0 1 2
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        EDID: 
                00ffffffffffff001e6d095b1f2c0400
                011c0104b53c22789e3035a7554ea326
                0f50542108007140818081c0a9c0d1c0
                8100010101014dd000a0f0703e803020
                650c58542100001a286800a0f0703e80
                0890650c58542100001a000000fd0038
                3d1e8738000a202020202020000000fc
                004c4720556c7472612048440a20014f
                02031171449004030123090707830100
                00023a801871382d40582c4500585421
                00001e565e00a0a0a029503020350058
                542100001a0000000000000000000000
                00000000000000000000000000000000
                00000000000000000000000000000000
                00000000000000000000000000000000
                000000000000000000000000000000c8
        Content Protection: Undesired 
                supported: Undesired, Desired, Enabled
        max bpc: 12 
                range: (6, 12)
        Broadcast RGB: Automatic 
                supported: Automatic, Full, Limited 16:235
        audio: auto 
                supported: force-dvi, off, auto, on
        link-status: Bad 
                supported: Good, Bad
        CONNECTOR_ID: 85 
                supported: 85
        non-desktop: 0 
                range: (0, 1)
  3840x2160 (0x47) 533.250MHz +HSync -VSync *current +preferred
        h: width  3840 start 3888 end 3920 total 4000 skew    0 clock 133.31KHz
        v: height 2160 start 2214 end 2219 total 2222           clock  60.00Hz
  3840x2160 (0x48) 266.640MHz +HSync -VSync
        h: width  3840 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 2160 start 2214 end 2219 total 2222           clock  30.00Hz
  2560x1440 (0x49) 241.500MHz +HSync -VSync
        h: width  2560 start 2608 end 2640 total 2720 skew    0 clock  88.79KHz
        v: height 1440 start 1443 end 1448 total 1481           clock  59.95Hz
  1920x1080 (0x4a) 148.500MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz
  1920x1080 (0x4b) 148.500MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz
  1920x1080 (0x4c) 148.352MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.43KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  59.94Hz
  1600x900 (0x4d) 108.000MHz +HSync +VSync
        h: width  1600 start 1624 end 1704 total 1800 skew    0 clock  60.00KHz
        v: height  900 start  901 end  904 total 1000           clock  60.00Hz
  1280x1024 (0x4e) 108.000MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz
        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz
  1280x800 (0x4f) 83.500MHz -HSync +VSync
        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  49.70KHz
        v: height  800 start  803 end  809 total  831           clock  59.81Hz
  1152x864 (0x50) 81.579MHz -HSync +VSync
        h: width  1152 start 1216 end 1336 total 1520 skew    0 clock  53.67KHz
        v: height  864 start  865 end  868 total  895           clock  59.97Hz
  1280x720 (0x51) 74.250MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  45.00KHz
        v: height  720 start  725 end  730 total  750           clock  60.00Hz
  1280x720 (0x52) 74.250MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  45.00KHz
        v: height  720 start  725 end  730 total  750           clock  60.00Hz
  1280x720 (0x53) 74.176MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  44.96KHz
        v: height  720 start  725 end  730 total  750           clock  59.94Hz
  1024x768 (0x54) 65.000MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz
        v: height  768 start  771 end  777 total  806           clock  60.00Hz
  800x600 (0x55) 40.000MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz
        v: height  600 start  601 end  605 total  628           clock  60.32Hz
  720x480 (0x56) 27.027MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock  31.50KHz
        v: height  480 start  489 end  495 total  525           clock  60.00Hz
  720x480 (0x57) 27.000MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock  31.47KHz
        v: height  480 start  489 end  495 total  525           clock  59.94Hz
  640x480 (0x58) 25.200MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.50KHz
        v: height  480 start  490 end  492 total  525           clock  60.00Hz
  640x480 (0x59) 25.175MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz
        v: height  480 start  490 end  492 total  525           clock  59.94Hz
  640x480 (0x5a) 25.175MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz
        v: height  480 start  490 end  492 total  525           clock  59.94Hz
HDMI-1 disconnected (normal left inverted right x axis y axis)
        Identifier: 0x43
        Timestamp:  372563
        Subpixel:   unknown
        Clones:     DP-1
        CRTCs:      0 1 2
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        Content Protection: Undesired 
                supported: Undesired, Desired, Enabled
        max bpc: 12 
                range: (8, 12)
        content type: No Data 
                supported: No Data, Graphics, Photo, Cinema, Game
        aspect ratio: Automatic 
                supported: Automatic, 4:3, 16:9
        Broadcast RGB: Automatic 
                supported: Automatic, Full, Limited 16:235
        audio: auto 
                supported: force-dvi, off, auto, on
        link-status: Good 
                supported: Good, Bad
        CONNECTOR_ID: 93 
                supported: 93
        non-desktop: 0 
                range: (0, 1)
HDMI-2 disconnected (normal left inverted right x axis y axis)
        Identifier: 0x44
        Timestamp:  372563
        Subpixel:   unknown
        Clones:    
        CRTCs:      0 1 2
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        Content Protection: Undesired 
                supported: Undesired, Desired, Enabled
        max bpc: 12 
                range: (8, 12)
        content type: No Data 
                supported: No Data, Graphics, Photo, Cinema, Game
        aspect ratio: Automatic 
                supported: Automatic, 4:3, 16:9
        Broadcast RGB: Automatic 
                supported: Automatic, Full, Limited 16:235
        audio: auto 
                supported: force-dvi, off, auto, on
        link-status: Good 
                supported: Good, Bad
        CONNECTOR_ID: 99 
                supported: 99
        non-desktop: 0 
                range: (0, 1)
HDMI-3 disconnected (normal left inverted right x axis y axis)
        Identifier: 0x45
        Timestamp:  372563
        Subpixel:   unknown
        Clones:    
        CRTCs:      0 1 2
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        Content Protection: Undesired 
                supported: Undesired, Desired, Enabled
        max bpc: 12 
                range: (8, 12)
        content type: No Data 
                supported: No Data, Graphics, Photo, Cinema, Game
        aspect ratio: Automatic 
                supported: Automatic, 4:3, 16:9
        Broadcast RGB: Automatic 
                supported: Automatic, Full, Limited 16:235
        audio: auto 
                supported: force-dvi, off, auto, on
        link-status: Good 
                supported: Good, Bad
        CONNECTOR_ID: 103 
                supported: 103
        non-desktop: 0 
                range: (0, 1)


I'm not sure what other side-effects these cause.

> Have you verified the issue with drmtip?

I haven't tried drmtip, but I'm running most recent kernel stable
5.1.15-gf0fae702de30 (released 40 hours ago)
If drmtip would've fixed it, I think they would've mentioned it here, no?

Thanks!

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