audio passthrough not working

• c

  clmetal

  11/10/24, 9:31 AM

  It was working, now I don't have the option to change my output device from computer speakers to the HDMI plugged into my device.

  It's not the computer; if I put the HDMI into a TV, it then gives me that option to change output.

  When I tried running kvmd-edidconf --set-audio=yes again, it now says AssertionError: Invalid EDID length: 257, should be 256 bytes

  So I tried running kvmd-edidconf --set-mfc-id=TSB --set-monitor-name=Toshiba-H2C thinking it could be a monitor EDID issue but again I get the Invalid EDID length. error again

  any advice?

   

   

   

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• k

  kathrynthayer33

  12/12/24, 12:52 AM

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• OK

  Otis Kelly

  2/24/25, 4:27 PM

  That EDID length error is definitely a red flag—it seems like the EDID data got corrupted or isn't being read correctly by PiKVM. A couple of things you can try:

  1. Manually Reset EDID – Try resetting the EDID config completely and reapplying it:

     bash

      

     kvmd-edidconf --reset kvmd-edidconf --set-audio=yes

     Then reboot and check if HDMI audio is back as an option.

  2. Check EDID File – If that doesn’t work, see if your EDID file is messed up. Run:

     bash

      

     ls -lh /etc/kvmd/edid.bin

     If it looks wrong (tiny file size, etc.), you might need to regenerate a valid one.

  3. Reflash Default EDID hill climb racing – Sometimes replacing the EDID file fixes these issues. You could try grabbing a fresh EDID dump from your TV (since you said it works when plugged into one) and applying that to PiKVM.

  4. Force HDMI Audio in Config – If the HDMI output is recognized but missing audio, try explicitly setting the HDMI audio profile in PiKVM’s config (/boot/config.txt or /etc/kvmd/override.yaml depending on your setup).

  Let me know if any of these work or if you get a different error! 

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