Pifi digi+ not recognized in osmc

having RPI3 with Kodi leia v18
kodi 17.8-170

pifi digi+ is recognized by aplay -l
card 2: sndrpihifiberry [snd_rpi_hifiberry_digi], device 0: HifiBerry Digi HiFi wm8804-spdif-0
Subdevices: 0/1
Subdevice #0: subdevice #0

can play with squeezelite.

but is is not available in OSMC / settings/system/audio :

How to enable pifi for OSMC?




I realized that it might be a rights problem.
dmix alsa is not working due to rights.

speaker-test -c 2 -t wav

speaker-test 1.1.3

Playback device is default
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to create IPC semaphore
Playback open error: -13,Permission denied

it is running as sudo.

anyone knowing which rights are required for audio and hifiberry which I can check?


looks like I solved it by adding:
ipc_perm 0666 # mixing for all users
to asound.conf