11)
Advanced troubleshooting
If you are unable to detect the IQaudIO sound card (using aplay –l) or alsamixer doesn’t show any
IQaudIO card then please re-check the section above and ensure that the configuration is correct. If
you are still having problems them check that the IQaudIO sound card modules are loaded etc.
pi@iqaudio ~ $ lsmod
Module Size Used by
i2c_dev 6047 0
snd_bcm2835 19769 0
snd_soc_pcm512x_i2c 2129 1
snd_soc_pcm512x 15547 1 snd_soc_pcm512x_i2c
regmap_i2c 2714 1 snd_soc_pcm512x_i2c
snd_soc_bcm2708_i2s 6701 2
snd_soc_iqaudio_dac 2548 0
regmap_mmio 2969 1 snd_soc_bcm2708_i2s
snd_soc_core 132622 3 snd_soc_pcm512x,snd_soc_iqaudio_dac,snd_soc_bcm2708_i2s
snd_compress 7736 1 snd_soc_core
snd_pcm_dmaengine 3287 1 snd_soc_core
snd_pcm 74825 6 snd_bcm2835,snd_soc_pcm512x,snd_soc_core,snd_soc_iqaudio_dac,snd_pcm_dmaengine
snd_seq 53561 0
snd_seq_device 3650 1 snd_seq
snd_timer 18157 2 snd_pcm,snd_seq
i2c_bcm2708 5014 0
snd 52116 10 snd_bcm2835,snd_soc_core,snd_timer,snd_pcm,snd_seq,snd_seq_device,snd_compress
uio_pdrv_genirq 2966 0
uio 8235 1 uio_pdrv_genirq
dmesg output should also show similar to the the following:
[pi@iqaudio ~ $ dmesg
[ 3.359858] snd-rpi-iqaudio-dac sound: pcm512x-hifi <-> 3f203000.i2s mapping ok
[ 16.070879] pcm512x 1-004c: No SCLK, using BCLK: -2
Note: The following output from dmesg is normal:
[ 4.210755] systemd[1]: Starting Journal Service...
[ 4.220932] systemd[1]: Started Journal Service.
[ 4.355655] systemd-udevd[109]: starting version 215
[ 4.796432] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[ 4.800981] bcm2708_i2c 3f804000.i2c: BSC1 Controller at 0x3f804000 (irq 79) (baudrate 100000)
[ 4.890738] snd-rpi-iqaudio-dac sound: ASoC: CPU DAI (null) not registered
[ 4.890781] snd-rpi-iqaudio-dac sound: snd_soc_register_card() failed: -517
[ 4.901458] snd-rpi-iqaudio-dac sound: ASoC: CODEC DAI pcm512x-hifi not registered
[ 4.901496] snd-rpi-iqaudio-dac sound: snd_soc_register_card() failed: -517
[ 5.044964] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 5.217873] snd-rpi-iqaudio-dac sound: pcm512x-hifi <-> 3f203000.i2s mapping ok
You may notice the above failure messages, this is normal operation as the pcm5122 device driver is
looking for audio boards in two locations, where one will always fail."
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