RPi 3 and HifiBerry Digi+ - White Noise

Help and Support
1

Just got my Pi 3, and setup a new Micro SD card from scratch. Initial thoughts are that its alot faster than my RPi 2.

I have also got the HifiBerry Digi+ (SPDIF Out) and after turning off LIRC Support, When I select ALSA Default (snd_rpi_hifiberry_digi S/DIF) Instead of HDMI audio out, all I get is white noise.

I am running the very latest OSMC (February 2016 2016.02.3), but still this persists. I have also tried re-seating both ends of the Optical Lead.

This problem doesn’t exist on my RPi 2 with the same setup.

Any help would be appreciated.

Thanks

2

Does adding “core_freq=250” to config.txt make a difference?

3

Seems to have sorted it for the moment. Though after the reboot after changing the config.txt there has been a few occasions when clicking through the menu.

Ill post back if it re-occurs.

Thanks

4

Its come back again. Do you want a copy of the log?

5

You can post the log just to confirm the core_freq=250 is present, but if it’s not that then I don’t know if the log will help.
Might be worth keeping an eye on this: https://github.com/raspberrypi/linux/issues/1321
which is probably the same issue.

6

Found a (temporary?) solution on the hifiberry forum:
Add dtoverlay=pi3-disable-bt to the /boot/config.txt before dtoverlay=hifiberry-digi-overlay

dtoverlay=pi3-disable-bt dtoverlay=hifiberry-digi-overlay

Then (ssh connection needed!)
sudo -i cd /boot/overlays/ wget https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/overlays/pi3-disable-bt-overlay.dtb

Reboot and enjoy - at least I am!

1 Like
7

This has been fixed in the Pi kernel tree. See here.

Hopefully Sam will pick that up in next update. The dtoverlay workaround you are using is fine for now.

8

It will be in the next update

Sam

9

I can confirm that this seems to work also for the Hifiberry Dac+ Pro on Raspberry Pi 3 (had the same issue there).

10

Hi,
short question: With the april update has this issue been fixed?
If yes, then the dtoverlay=pi3-disable-bt command can be moved if I am not mistaken.
Thank you for a quick feedback.
relaxer

11

Yes – you no longer need that DT overlay

12

Thank you very much Sam :slight_smile: