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My monitor has built-in speakers. It's connected to my desktop using HDMI. Speakers work fine, connection is audio jack.

Audio stopped working. The only thing I can think of is the connection of the monitor: I changed that to DisplayPort. Could this be related?

If not is there any way to troubleshoot sound issues?

  • Much depends on the manufacturers implementation of displayport. Audio is supported but may not be implemented – Elder Geek Dec 7 '18 at 17:16
  • Please edit the output of sudo lshw -C multimedia into your post. Thank you for helping us help you! – Elder Geek Dec 7 '18 at 17:17
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I think I have found it myself. Looks like my sound card was suspended after hibernation. This describes it: https://help.ubuntu.com/community/SoundTroubleshooting

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