No sound - GPi Case - Failed to attached default card

[gts197]

Hello,

I did some searching and did find posts that had no sound issues etc but I was unable to find anything that matched exactly what I am dealing with and alot of the fixes require access to the "Audio" menu that I cannot even get access to. Attached are images of the error I am getting when I try to adjust the settings in the "Audio" menu. I am unable to get any sound working on my Retro Pi install in my GPi Case. Any help would be greatly appreciated. I am trying to avoid needing to reinstall everything.

[mitu]

Please add some info about your setup as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.
How is the GPI case outputting sound ? Does it use an I2S hat ? Judging by the 1st message from the screenshot (from the Audio settings), looks like the onboard sound is disabled via config.txt.

[gts197]

@mitu Thanks for the reply. See below information:

Pi Model or other hardware: (PI 0 W)
Power Supply used: (n/a)
RetroPie Version Used (4.7.18):
Built From: (retropie-buster-4.7.1-rpi1_zero)
USB Devices connected: (IO conversion board included with GPi Case - https://www.retroflag.com/GPi-CASE.html)

With regards to the config file I never edited it. I am unable to get access to it at the moment but I could upload if needed.

[mitu]

Looking at the support site, it doesn't look like it's going to work OOB with the RetroPie image - the video needs configuring and it looks like there's some configuration added for the audio also. Are you sure you're using the stock RetroPie image ? Post your config.txt.

[gts197]

@mitu All the patches that are required for the case were installed. The only thing that is not working is the audio.

I am 100% sure that the image used was downloaded directly from the official site for the Pi 0.

Below is the text of the config file. It would not allow me to upload the actual file.

# For more options and information see
# http://www.raspberrypi.org/documentation/configuration/config-txt.md
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2
#hdmi_force_hotplug=1
#hdmi_force_edid_audio=1

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

#config_hdmi_boost=0

# force hdmi while the tv can take time before sending the signal on the hdmi output
#hdmi_force_hotplug=1

# uncomment for composite PAL
#sdtv_mode=2

# uncomment for lirc-rpi
#dtoverlay=lirc-rpi

# if you plug your tv at the same time as your rpi and that the rpi switches from the hdmi or give a low resolution because tv had no enough time to initialize it
boot_delay=3

# uncomment if you don't want the rainbow at startup
disable_splash=1

# default CEC name
cec_osd_name=recalbox

# Overclock
gpu_mem_256=128
gpu_mem_512=256
gpu_mem_1024=512

avoid_safe_mode=1

kernel=zImage

#dtparam=audio=on
display_rotate=1
dtoverlay=dpi24
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=320
framebuffer_height=240
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x6016
#hdmi_timings=320 0 28 18 28 480 0 2 2 4 0 0 0 60 0 32000000 6
hdmi_timings=240 1 38 10 20 320 1 20 4 4 0 0 0 60 0 6400000 1
dtoverlay=pwm-2chan,pin=18,func=2,pin2=19,func2=2
disable_pvt=1
disable_audio_dither=1
dtoverlay=pwm-audio-pi-zero

[gts197]

@mitu So I did some digging and found a post here talking about this and I was able to get sound going in games only…doesn’t seem to be working in the menus but thats ok.

Here is a link to that post (https://retropie.org.uk/forum/topic/28809/no-in-game-sound-after-the-dec-2020-raspberry-pi-os-updates/6)

I added this to the first line in /boot/cmdline.txt and it did the trick.

snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_compat_alsa=1

[mitu]

@gts197 Glad you got it sorted.

RetroFlag should update their scripts to work with newer Raspberry Pi OS releases or at least have some more details explanations on how the sound works with their overlay.

[2Play]

@mitu I agree with you.
I was experimenting recently on pi0 and checked the RetroFlag "patch" for their GPi Case and it has by default disabled#dtparam=audio=on applied to the config .txt which causes the exact error posted
If the # is removed and reboot the sound is back to normal.

They should update their scripts/info rather users get troubles and need to apply cmdline alsa or edit sudo nano /usr/share/alsa/alsa.confand change

defaults.ctl.card 0
defaults.pcm.card 0
to
defaults.ctl.card 1
defaults.pcm.card 1