Hifiberry light: Random channel swap

Hi Fiberries,

I have an issue with the Hifiberry Light or with the hifiberry-dac driver I guess.

After a random time the left and right channel swap. (usually happens at least once after 30s of playback)

This is not a problem of the Dac itself, as the swap is visible within the PCM signal from the RPi. (stable left/right word clock signal)

It does not occur with the hifiberry-dacplus overlay with the same hardware except the DAC.

It is not limited to one Raspberry, tried several Raspberry Pi 2 B. And not to a single Kernel, tried

  • Linux 4.1.18-v7+ #846 SMP Thu Feb 25 14:22:53 GMT 2016 armv7l GNU/Linux
  • Linux 4.1.19-2-ARCH #1 SMP Sat Mar 5 22:22:01 MST 2016 armv7l GNU/Linux

So I suspect a driver issue. Any suggestions where to look first?

To reproduce, it is easier to hear with muting one channel or using a stereo test track.






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