CommentStreams:1b31e01acd21d2f759a408ae6c7b41bc

I finally fixed the issue like this:

I plugged a regular screen on the computer i will use with kvm, and checked the sound works properly.

This computer runs debian As root I used 'hw-probe -all" to extract the edid you can then find the edid here :

EDID=/root/HW_PROBE/LATEST/hw.info/logs/edid

then I created the hex file using edid-decode $EDID | grep '^[0-9,a-f][0-9,a-f] ' > edid_new.hex

Transfer the file on the kvm, plug the screen cable on the kvm and tested it with:

kvmd-edidconf --edid=edid_new.hex --apply

As it worked cat edid_new.hex > /etc/kvmd/tc358743-edid.hex And then rebooted the kvm

Hope this can be useful to someone else ;-)