Ubuntu 18.04 (Xubuntu) HDMI Audio Issue

by low.pants   Last Updated May 15, 2019 16:02 PM

I cannot get audio output from my second display (HDMI-A-4 in what shall follow). Under the HDMI-A-4 head, in xrandr, there is no row corresponding to audio. All audio output sources in pulseaudio are unplugged, except for my headphones. Here is the output of xrandr --verbose:

~$ xrandr --verbose Screen 0: minimum 320 x 200, current 3280 x 1090, maximum 16384 x 16384 DisplayPort-1 disconnected (normal left inverted right x axis y axis) Identifier: 0x7c Timestamp: 47655 Subpixel: unknown Clones:
CRTCs: 1 0 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: GAMMA_LUT_SIZE: 4096 range: (0, -1) DEGAMMA_LUT_SIZE: 4096 range: (0, -1) GAMMA_LUT: 0 range: (0, 65535) CTM: 0 DEGAMMA_LUT: 0 range: (0, 65535) TearFree: auto supported: off, on, auto underscan vborder: 0 range: (0, 128) underscan hborder: 0 range: (0, 128) underscan: off supported: off, on, auto scaling mode: None supported: None, Full, Center, Full aspect link-status: Good supported: Good, Bad CONNECTOR_ID: 55 supported: 55 non-desktop: 0 range: (0, 1) DisplayPort-2 disconnected (normal left inverted right x axis y axis) Identifier: 0x7d Timestamp: 47655 Subpixel: unknown Clones:
CRTCs: 1 0 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: GAMMA_LUT_SIZE: 4096 range: (0, -1) DEGAMMA_LUT_SIZE: 4096 range: (0, -1) GAMMA_LUT: 0 range: (0, 65535) CTM: 0 DEGAMMA_LUT: 0 range: (0, 65535) TearFree: auto supported: off, on, auto underscan vborder: 0 range: (0, 128) underscan hborder: 0 range: (0, 128) underscan: off supported: off, on, auto scaling mode: None supported: None, Full, Center, Full aspect link-status: Good supported: Good, Bad CONNECTOR_ID: 57 supported: 57 non-desktop: 0 range: (0, 1) HDMI-A-3 disconnected (normal left inverted right x axis y axis) Identifier: 0x7e Timestamp: 47655 Subpixel: unknown Clones:
CRTCs: 1 0 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: GAMMA_LUT_SIZE: 4096 range: (0, -1) DEGAMMA_LUT_SIZE: 4096 range: (0, -1) GAMMA_LUT: 0 range: (0, 65535) CTM: 0 DEGAMMA_LUT: 0 range: (0, 65535) TearFree: auto supported: off, on, auto underscan vborder: 0 range: (0, 128) underscan hborder: 0 range: (0, 128) underscan: off supported: off, on, auto scaling mode: None supported: None, Full, Center, Full aspect link-status: Good supported: Good, Bad CONNECTOR_ID: 59 supported: 59 non-desktop: 0 range: (0, 1) HDMI-A-4 connected 1360x768+0+0 (0x82) normal (normal left inverted right x axis y axis) 484mm x 272mm Identifier: 0x7f Timestamp: 47655 Subpixel: unknown Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones:
CRTC: 1 CRTCs: 1 0 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: EDID: 00ffffffffffff004249320001000000 1c110103805734780ad0dda953499d23 11474abfce0001010101010101010101 010101010101662150b051001b300070 2644e4101100001ed60980a020e02d10 08602200128e21080818000000fc0048 444d49204c43442054560a20000000fd 00304c0f440f000a202020202020011f 02031e754b01020405060e101213141f 230907078301000066030c001000011d 007251d01e206e285500c48e2100001e 8c0aa01451f01600267c4300138e2100 0098f339801871382d40582c4500c48e 2100001e662150b051001b3000702644 e4101100001e00000000000000000000 000000000000000000000000000000b3 GAMMA_LUT_SIZE: 4096 range: (0, -1) DEGAMMA_LUT_SIZE: 4096 range: (0, -1) GAMMA_LUT: 0 range: (0, 65535) CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 DEGAMMA_LUT: 0 range: (0, 65535) TearFree: auto supported: off, on, auto underscan vborder: 0 range: (0, 128) underscan hborder: 0 range: (0, 128) underscan: off supported: off, on, auto scaling mode: None supported: None, Full, Center, Full aspect link-status: Good supported: Good, Bad CONNECTOR_ID: 61 supported: 61 non-desktop: 0 range: (0, 1) 1360x768 (0x82) 85.500MHz +HSync +VSync *current +preferred h: width 1360 start 1616 end 1728 total 1792 skew 0 clock 47.71KHz v: height 768 start 786 end 792 total 795 clock 60.02Hz 1920x1080 (0x83) 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 (0x84) 148.500MHz +HSync +VSync h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 56.25KHz v: height 1080 start 1084 end 1089 total 1125 clock 50.00Hz 1920x1080 (0x85) 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 1280x720 (0x86) 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 (0x87) 74.250MHz +HSync +VSync h: width 1280 start 1720 end 1760 total 1980 skew 0 clock 37.50KHz v: height 720 start 725 end 730 total 750 clock 50.00Hz 1280x720 (0x88) 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 (0x89) 78.750MHz +HSync +VSync h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.02KHz v: height 768 start 769 end 772 total 800 clock 75.03Hz 1024x768 (0x8a) 75.000MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1328 skew 0 clock 56.48KHz v: height 768 start 771 end 777 total 806 clock 70.07Hz 1024x768 (0x8b) 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 1440x480 (0x8c) 54.054MHz -HSync -VSync h: width 1440 start 1472 end 1596 total 1716 skew 0 clock 31.50KHz v: height 480 start 489 end 495 total 525 clock 60.00Hz 1440x480 (0x8d) 54.000MHz -HSync -VSync h: width 1440 start 1472 end 1596 total 1716 skew 0 clock 31.47KHz v: height 480 start 489 end 495 total 525 clock 59.94Hz 800x600 (0x8e) 50.000MHz +HSync +VSync h: width 800 start 856 end 976 total 1040 skew 0 clock 48.08KHz v: height 600 start 637 end 643 total 666 clock 72.19Hz 800x600 (0x8f) 49.500MHz +HSync +VSync h: width 800 start 816 end 896 total 1056 skew 0 clock 46.88KHz v: height 600 start 601 end 604 total 625 clock 75.00Hz 800x600 (0x90) 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 800x600 (0x91) 36.000MHz +HSync +VSync h: width 800 start 824 end 896 total 1024 skew 0 clock 35.16KHz v: height 600 start 601 end 603 total 625 clock 56.25Hz 720x576 (0x92) 27.000MHz -HSync -VSync h: width 720 start 732 end 796 total 864 skew 0 clock 31.25KHz v: height 576 start 581 end 586 total 625 clock 50.00Hz 720x480 (0x93) 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 (0x94) 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 (0x95) 31.500MHz -HSync -VSync h: width 640 start 656 end 720 total 840 skew 0 clock 37.50KHz v: height 480 start 481 end 484 total 500 clock 75.00Hz 640x480 (0x96) 31.500MHz -HSync -VSync h: width 640 start 664 end 704 total 832 skew 0 clock 37.86KHz v: height 480 start 489 end 492 total 520 clock 72.81Hz 640x480 (0x97) 30.240MHz -HSync -VSync h: width 640 start 704 end 768 total 864 skew 0 clock 35.00KHz v: height 480 start 483 end 486 total 525 clock 66.67Hz 640x480 (0x98) 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 (0x99) 25.180MHz -HSync -VSync h: width 640 start 648 end 744 total 800 skew 0 clock 31.48KHz v: height 480 start 482 end 484 total 525 clock 59.95Hz 640x480 (0x9a) 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 720x400 (0x9b) 28.320MHz -HSync +VSync h: width 720 start 738 end 846 total 900 skew 0 clock 31.47KHz v: height 400 start 412 end 414 total 449 clock 70.08Hz DVI-D-0 connected primary 1920x1080+1360+10 (0x83) normal (normal left inverted right x axis y axis) 510mm x 290mm Identifier: 0x80 Timestamp: 47655 Subpixel: unknown Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones:
CRTC: 0 CRTCs: 1 0 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: EDID: 00ffffffffffff000469c12301010101 2b19010380331d78eadd45a3554fa027 125054afcf80714f8180818fb3008140 9500a9400101023a801871382d40582c 4500fe221100001e000000fd00384b1e 530f000a202020202020000000fc0056 583233380a20202020202020000000ff 0046414c4d52533031313234330a0197 02031df14a900403011412051f101323 0907078301000065030c001000023a80 1871382d40582c4500fe221100001e01 1d8018711c1620582c2500fe22110000 9e011d007251d01e206e285500fe2211 00001e8c0ad08a20e02d10103e9600fe 22110000180000000000000000000000 000000000000000000000000000000e6 GAMMA_LUT_SIZE: 4096 range: (0, -1) DEGAMMA_LUT_SIZE: 4096 range: (0, -1) GAMMA_LUT: 0 range: (0, 65535) CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 DEGAMMA_LUT: 0 range: (0, 65535) TearFree: auto supported: off, on, auto underscan vborder: 0 range: (0, 128) underscan hborder: 0 range: (0, 128) underscan: off supported: off, on, auto scaling mode: None supported: None, Full, Center, Full aspect link-status: Good supported: Good, Bad CONNECTOR_ID: 64 supported: 64 non-desktop: 0 range: (0, 1) 1920x1080 (0x83) 148.500MHz +HSync +VSync *current +preferred 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 (0x84) 148.500MHz +HSync +VSync h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 56.25KHz v: height 1080 start 1084 end 1089 total 1125 clock 50.00Hz 1920x1080 (0x85) 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 1680x1050 (0x9c) 119.000MHz +HSync -VSync h: width 1680 start 1728 end 1760 total 1840 skew 0 clock 64.67KHz v: height 1050 start 1053 end 1059 total 1080 clock 59.88Hz 1280x1024 (0x9d) 135.000MHz +HSync +VSync h: width 1280 start 1296 end 1440 total 1688 skew 0 clock 79.98KHz v: height 1024 start 1025 end 1028 total 1066 clock 75.02Hz 1280x1024 (0x9e) 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 1440x900 (0x9f) 88.750MHz +HSync -VSync h: width 1440 start 1488 end 1520 total 1600 skew 0 clock 55.47KHz v: height 900 start 903 end 909 total 926 clock 59.90Hz 1280x960 (0xa0) 108.000MHz +HSync +VSync h: width 1280 start 1376 end 1488 total 1800 skew 0 clock 60.00KHz v: height 960 start 961 end 964 total 1000 clock 60.00Hz 1280x800 (0xa1) 148.500MHz +HSync +VSync h: width 1280 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz v: height 800 start 1084 end 1089 total 1125 clock 60.00Hz 1152x864 (0xa2) 108.000MHz +HSync +VSync h: width 1152 start 1216 end 1344 total 1600 skew 0 clock 67.50KHz v: height 864 start 865 end 868 total 900 clock 75.00Hz 1280x720 (0x86) 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 (0x87) 74.250MHz +HSync +VSync h: width 1280 start 1720 end 1760 total 1980 skew 0 clock 37.50KHz v: height 720 start 725 end 730 total 750 clock 50.00Hz 1280x720 (0x88) 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 (0x89) 78.750MHz +HSync +VSync h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.02KHz v: height 768 start 769 end 772 total 800 clock 75.03Hz 1024x768 (0x8a) 75.000MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1328 skew 0 clock 56.48KHz v: height 768 start 771 end 777 total 806 clock 70.07Hz 1024x768 (0x8b) 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 (0x8e) 50.000MHz +HSync +VSync h: width 800 start 856 end 976 total 1040 skew 0 clock 48.08KHz v: height 600 start 637 end 643 total 666 clock 72.19Hz 800x600 (0x8f) 49.500MHz +HSync +VSync h: width 800 start 816 end 896 total 1056 skew 0 clock 46.88KHz v: height 600 start 601 end 604 total 625 clock 75.00Hz 800x600 (0x90) 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 800x600 (0x91) 36.000MHz +HSync +VSync h: width 800 start 824 end 896 total 1024 skew 0 clock 35.16KHz v: height 600 start 601 end 603 total 625 clock 56.25Hz 720x576 (0x92) 27.000MHz -HSync -VSync h: width 720 start 732 end 796 total 864 skew 0 clock 31.25KHz v: height 576 start 581 end 586 total 625 clock 50.00Hz 720x480 (0x93) 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 (0x94) 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 (0x95) 31.500MHz -HSync -VSync h: width 640 start 656 end 720 total 840 skew 0 clock 37.50KHz v: height 480 start 481 end 484 total 500 clock 75.00Hz 640x480 (0x96) 31.500MHz -HSync -VSync h: width 640 start 664 end 704 total 832 skew 0 clock 37.86KHz v: height 480 start 489 end 492 total 520 clock 72.81Hz 640x480 (0x98) 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 (0x9a) 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 720x400 (0x9b) 28.320MHz -HSync +VSync h: width 720 start 738 end 846 total 900 skew 0 clock 31.47KHz v: height 400 start 412 end 414 total 449 clock 70.08Hz HDMI-1-1 disconnected (normal left inverted right x axis y axis) Identifier: 0x42 Timestamp: 23798 Subpixel: unknown Clones:
CRTCs: 6 7 8 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: PRIME Synchronization: 1 supported: 0, 1 Content Protection: Undesired supported: Undesired, Desired, Enabled 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: 71 supported: 71 non-desktop: 0 range: (0, 1) HDMI-1-2 disconnected (normal left inverted right x axis y axis) Identifier: 0x43 Timestamp: 23798 Subpixel: unknown Clones:
CRTCs: 6 7 8 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: PRIME Synchronization: 1 supported: 0, 1 Content Protection: Undesired supported: Undesired, Desired, Enabled 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: 77 supported: 77 non-desktop: 0 range: (0, 1) DP-1-1 disconnected (normal left inverted right x axis y axis) Identifier: 0x44 Timestamp: 23798 Subpixel: unknown Clones: HDMI-1-3 CRTCs: 6 7 8 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: PRIME Synchronization: 1 supported: 0, 1 Content Protection: Undesired supported: Undesired, Desired, Enabled 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: 80 supported: 80 non-desktop: 0 range: (0, 1) HDMI-1-3 disconnected (normal left inverted right x axis y axis) Identifier: 0x45 Timestamp: 23798 Subpixel: unknown Clones: DP-1-1 CRTCs: 6 7 8 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: PRIME Synchronization: 1 supported: 0, 1 Content Protection: Undesired supported: Undesired, Desired, Enabled 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: 85 supported: 85 non-desktop: 0 range: (0, 1)

Thank you for your help.



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