RPi4 + LibreELEC 10.0.1 + Hifiberry Amp2 not working together

FHoevi · November 14, 2021 at 3:45 PM

I've just freshly set up a brandnew RPi4 with a Hifiberry Amp2 HAT as well as LibreELEC 10.0.1.

The problem now is that aplay --list-device recognizes this device as card 3 but I cannot choose it via System -> Audio -> Audio Device. There I can only choose from "ALSA:bcm2835 Headphones" or "PULSE:Default".

When trying to play an mp3 file I get the error "aplay: main:830: audio open error: No such device".

What's going wrong?

My /flash/config.txt contains these lines:

Code

dtoverlay=hifiberry-dacplus
dtparam=audio=on
audio_pwm_mode=1

When switching off dtparam=audio=off the choosing option for audio device is greyed out. I already tried some things at this place but this is sort of driving me crazy.

Any hint would be highly appreciated.

**Da Flex** · November 14, 2021 at 5:04 PM

Use dtoverlay=hifiberry-amp.

FHoevi · November 15, 2021 at 5:08 PM

Nope, unfortunately doesn't work either. And I thought that an Amp2 board is essentially a DAC+ board, cf. Amp2 description.

**Da Flex** · November 15, 2021 at 6:49 PM

You're right, the HiFiBerry Amp2 uses the DAC+ driver.

Try these config.txt options, don't use dtparam=audio or audio_pwm_mode:

Code

dtoverlay=hifiberry-dacplus
force_eeprom_read=0

FHoevi · November 16, 2021 at 12:52 PM

Thanks for your reply, I went ahead as instructed, but it still does not work at all. Omitting dtparam=audio=on leads to an audio output choice being greyed out. Reintroducing it shows the same behavior as above, Amp2 is not recognized by Kodi running on that machine running LibreELEC 10.0.1.

FHoevi · November 16, 2021 at 1:24 PM

May it be a good idea to start all over again with a fresh install?

ghtester · November 16, 2021 at 3:05 PM

It's always a best choice to start with a fresh install if you don't care about current LE configuration (or you can install to a test USB stick).

**Da Flex** · November 16, 2021 at 4:12 PM

Install "Raspberry Pi OS" on another microSD, and use the settings of post #4. If you also get no audio there, I'm pretty sure your HAT is broken, and it's best to order a replacement / use your warranty.

FHoevi · November 21, 2021 at 3:19 PM

Good news, I just created a fresh install of LibreELEC 10.0.1 on the very same SD card and did the initial bootup with repartitioning of the SD card again. Then I added these two lines at the very end of /flash/config.txt:

Code

dtparam=audio=on
dtoverlay=hifiberry-dacplus

and, tadaa, it's working again.

I even did 3 or 4 additional reboots to see if it "forgets" about my settings and now it seems it doesn't. Just listening to Jimi Hendrix being broadcasted over internet right now.