I just installed batocera 5.24 in my old Rikomagic MK36S (x86 64 bits Intel Atom x5-Z8300 chip) and must say that I've been pleasantly surprised. Such a great job!! Specially when you compare with other Retro gaming platform options.
Everything worked flawlessly but I suddenly realized that I could only get the audio through the 3.5 jack output, not through HDMI. I checked the "audio settings" and I could only find 3 options (auto, custom and USB), but nothing about HDMI there. I tried accesing Alsa Mixer (Ctrl+Alt+F4) and I confirmed that no audio card had been detected by the system.
This could be just another case of a chip no supported and that would be fine, but the point is that afterwards I installed Recalbox (6.1.1-DragonBlaze) on the same device and the sound over HDMI worked perfectly!! I entered in the "audio settings" menu again and I checked there were much more options among them the HDMI ones that didn't appear on the same menu in Batocera. I selected "[2:2] HDMILPEAUDIO - INTEL HDMI/DP LPE AUDIO =" option and the sound over HDMI worked.
I was taking a look to the Batocera WIKI and I read that HDMI audio is disabled by default, so I followed the steps described to enable it again changing syslinux.cfg files in EFI and BOOT folders (It's extrange that in the WIKI refers to a different file name: grub.cfg) but nothing changed and the audio over HDMI kept on not working.
So, in a nutshell, looks like this device is able to play sound through HDMI (Recalbox is able to do it) but for any reason is not working in Batocera.
Could anybody help me?? Thank you very much in advance