Build error on kernel: 6.1.21-v7+ (armv7l) (pi2zeroW)

[Fysek]

I am working on PI 2 zero W with WM8960 Audio HAT https://www.waveshare.com/wiki/WM8960_Audio_HAT
raspberrypi-kernel : (1:1.20230405-1)
raspberrypi-kernel-headers: (1:1.20230405-1)

I did this:
sudo apt-get dist-upgrade
sudo apt-get update
git clone https://github.com/waveshare/WM8960-Audio-HAT
cd WM8960-Audio-HAT
sudo nano wm8960-soundcard.dts
Change target = <&i2c1>; to <&i2c0> ; line 25
sudo ./install.sh
sudo reboot -> nothing changed

• "uname -a": Linux pizero 6.1.21-v7+ #1642 SMP Mon Apr 3 17:20:52 BST 2023 armv7l GNU/Linux
• i2cdetect:

i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- UU -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

• systemctl status wm8960-soundcard.service:

wm8960-soundcard.service - WM8960 soundcard service
     Loaded: loaded (/lib/systemd/system/wm8960-soundcard.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Sun 2023-12-10 18:40:20 CET; 12min ago
    Process: 369 ExecStart=/usr/bin/wm8960-soundcard (code=exited, status=99)
   Main PID: 369 (code=exited, status=99)
        CPU: 716ms

Dec 10 18:40:17 pizero systemd[1]: Starting WM8960 soundcard service...
Dec 10 18:40:17 pizero wm8960-soundcard[369]: + exec
Dec 10 18:40:17 pizero wm8960-soundcard[400]: ++ basename /usr/bin/wm8960-soundcard
Dec 10 18:40:20 pizero systemd[1]: wm8960-soundcard.service: Main process exited, code=exited, status=99/n/a
Dec 10 18:40:20 pizero systemd[1]: wm8960-soundcard.service: Failed with result 'exit-code'.
Dec 10 18:40:20 pizero systemd[1]: Failed to start WM8960 soundcard service.

Logs:

cat /var/lib/dkms/wm8960-soundcard/1.0/6.1.21-v7+/armv7l/log/make.log
DKMS make.log for wm8960-soundcard-1.0 for kernel 6.1.21-v7+ (armv7l)
Sun 10 Dec 18:39:13 CET 2023
make: Entering directory '/usr/src/linux-headers-6.1.21-v7+'
  CC [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/wm8960.o
  CC [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/wm8960-soundcard.o
/var/lib/dkms/wm8960-soundcard/1.0/build/wm8960.c: In function ‘wm8960_hw_params’:
/var/lib/dkms/wm8960-soundcard/1.0/build/wm8960.c:882:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
  882 |   if ((iface & 0x3) != 0) {
      |      ^
/var/lib/dkms/wm8960-soundcard/1.0/build/wm8960.c:887:2: note: here
  887 |  default:
      |  ^~~~~~~
  LD [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/snd-soc-wm8960-soundcard.o
  LD [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/snd-soc-wm8960.o
  MODPOST /var/lib/dkms/wm8960-soundcard/1.0/build/Module.symvers
  CC [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/snd-soc-wm8960-soundcard.mod.o
  CC [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/snd-soc-wm8960.mod.o
  LD [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/snd-soc-wm8960-soundcard.ko
  LD [M]  /var/lib/dkms/wm8960-soundcard/1.0/build/snd-soc-wm8960.ko
make: Leaving directory '/usr/src/linux-headers-6.1.21-v7+'

[YuMingC233]

I encountered the same wm8960-soundcard.service error code 99 issue, but I just did a test and it doesn't seem to affect any related functionalities, such as running commands like aplay xxx.wav, etc. It's really strange, isn't it?

[Fysek]

Interesting finding @YuMingC233, did you try to run alsamixer to check if raspbian sees it as a sound card? Here's a manual https://www.waveshare.com/wiki/WM8960_Audio_HAT
Btw. what is your hardware and kernel version?

[YuMingC233]

Based on the results, it is able to very accurately recognize it as a sound card:

My hardware:

Raspberry Pi Zero 2

WM8960 Audio HAT

After assembly

My kernel version:

Linux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/Linux

How I discovered this anomaly

When I normally boot it up, there is an error at the end of the startup, like this:

Further error information

Looks identical, doesn't it? 😏😏

When I tried to reboot:

Ok, it failed.

When I checked journalctl -xe to investigate further:

Memory leak? But when I checked htop, I found no applications hogging system resources:

However, when I tried to reboot it again, the same error occurred.

Actually, this issue is not "fatal." When I use aplay xxx.wav in this state, it can play correctly, and even more advanced "real-time listening" commands like arecord -f cd | sudo arecord -f cd | aplay work fine.

Note, none of my commands explicitly specify the hardware.

@Fysek You might also try testing to see if you can replicate it.

Cheers 🥂

[Subuday]

I have been experience the same problem.

[Subuday]

Okay, it looks like I figured out what's problem.

[Fysek]

Okay, it looks like I figured out what's problem.

@Subuday Could you share what's the problem and any possible solutions, please?

[Subuday]

On my Raspberry Pi Zero 2 W, by default I have two devices:

card 0: vc4hdmi
card 1: wm8960soundcard

You can check this using aplay -l.

Then I checked logs of wm8960-soundcard.service:
alsactl restore

No state is present for card vc4hdmi
alsa-lib main.c:1014:(snd_use_case_mgr_open) error: failed to import hw:0 use case configuration -2
Found hardware: "vc4-hdmi" "" "" "" ""
Hardware is initialized using a generic method
No state is present for card vc4hdmi

So it looks like alsactl tries to restore by default with card 0 that is vc4hdmi instead wm8960soundcard.

To fix starting of the service, just modify it to launch with the correct card. In my case it is alsactl restore -c 1

[Subuday]

Maybe we need some code that would either disabling vc4hdmi or setting proper card by searching in system wm8960soundcard.

[jcoe2412]

I have a similar problem, but the fix does not work for me , I am getting an error

jcoe2412@raspberrypi:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: vc4hdmi0 [vc4-hdmi-0], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: vc4hdmi1 [vc4-hdmi-1], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: wm8960soundcard [wm8960-soundcard], device 0: 1f000a0000.i2s-wm8960-hifi wm8960-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
jcoe2412@raspberrypi:~ $ alsactl restore -c 2
alsactl: state_lock:167: file /var/lib/alsa/asound.state lock error: Permission denied
alsactl: load_state:1689: Cannot open /var/lib/alsa/asound.state for reading: Permission denied
alsactl: card_lock:196: card 2 lock error: Permission denied
jcoe2412@raspberrypi:~ $ sudo alsactl restore -c 2
alsa-lib main.c:1541:(snd_use_case_mgr_open) error: failed to import hw:2 use case configuration -2

Any idea how to fix this ? MAny thanks.

[jcoe2412]

I forgot to mention above that my problem is on the PI5, I guess it is the same though.

[jcoe2412]

if the issue is caused by the HDMI soundcards, wouldn't the following fix the problem if we add ",noaudio" to /boot/firmware/config.txt

dtoverlay=vc4-kms-v3d,noaudio

see https://www.raspberrypi.com/documentation/computers/config_txt.html#hdmi-audio