using hifiberryos-20220826-pi3.img on a pi3
It detects a hifiberry dac while it must be a dacplus adc
Changing the config.txt doesn't help because the OS restores it to dac.
How can I disable this "intelligence feature" so I can make changes without being restored.
tried with force_eeprom_read=0 already.
It should only do this if your DAC+ ADC isn't detected. You might have a hardware problem with either the Pi or the DAC. Is it directly connected without any othe5r stuff connected to the GPIOs? Make sure it's plugged in correctly.
Only the dac+adc board is connected with a standard female header (no extended version).
Verified the board with an other linux installation on a pi 4 and at least the DAC and ADC are working...
Hmm, strange. What's the output of
/opt/hifiberry/bin/detect-hifiberry
config.txt before it gets modified by the system:
# Please note that this is only a sample, we recommend you to change it to fit
# your needs.
# You should override this file using a post-build script.
# See http://buildroot.org/manual.html#rootfs-custom
# and http://elinux.org/RPiconfig for a description of config.txt syntax
# We always use the same names, the real used variant is selected by
# BR2_PACKAGE_RPI_FIRMWARE_{DEFAULT,X,CD} choice
start_file=start.elf
fixup_file=fixup.dat
kernel=zImage
dtdebug=1
# To use an external initramfs file
#initramfs rootfs.cpio.gz
# Disable overscan assuming the display supports displaying the full resolution
# If the text shown on the screen disappears off the edge, comment this out
disable_overscan=1
# How much memory in MB to assign to the GPU on Pi models having
# 256, 512 or 1024 MB total memory
gpu_mem_256=100
gpu_mem_512=100
gpu_mem_1024=100
# Enable I2C and SPI
dtparam=i2c=on
dtparam=spi=on
dtoverlay=i2c-gpio,i2c_gpio_sda=0,i2c_gpio_scl=1
dtoverlay=vc4-fkms-v3d,audio=off
dtoverlay=hifiberry-dacplusadc
output of detect-hifiberry:
ALSA lib confmisc.c:855:(parse_card) cannot find card '0'
ALSA lib conf.c:5111:(_snd_config_evaluate) function snd_func_card_inum returned error: No such file or directory
ALSA lib confmisc.c:422:(snd_func_concat) error evaluating strings
ALSA lib conf.c:5111:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1334:(snd_func_refer) error evaluating name
ALSA lib conf.c:5111:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5599:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib control.c:1481:(snd_ctl_open_noupdate) Invalid CTL default
amixer: Mixer attach default error: No such file or directory
play FAIL sox: Sorry, there is no default audio device configured
aplay: device_list:274: no soundcards found...
Mounting /boot
Detecting using I2C
Could not find an I2C enabled sound card
Assuming HiFiBerry DAC+ Light, Zero
aplay: device_list:274: no soundcards found...
Hmm, looks like a general problem on your system. This could be caused by a corrupted file system. Try a fresh installation.