'no sound device found after flashing my aosp Pixel 3a XL (bonito) kernel
I had built my linux kernel for my Pixel 3a XL (bonito), just followed the building-kernels guide. But after I replaced the kernel I had built, no sound device found under /dev/snd/:
bonito:/ # ls -al /dev/snd
total 0
drwxr-xr-x 2 root root 60 1970-09-18 10:31 .
drwxr-xr-x 20 root root 5340 2022-04-21 17:03 ..
crw-rw---- 1 system audio 116, 33 1970-09-18 10:31 timer
The correct case:
bonito:/ # ls -al /dev/snd
total 0
drwxr-xr-x 2 root root 2320 2022-04-21 17:29 .
drwxr-xr-x 20 root root 5360 2022-04-21 17:29 ..
crw-rw---- 1 system audio 116, 58 2022-04-21 17:29 comprC0D15
crw-rw---- 1 system audio 116, 59 2022-04-21 17:29 comprC0D28
crw-rw---- 1 system audio 116, 60 2022-04-21 17:29 comprC0D29
crw-rw---- 1 system audio 116, 61 2022-04-21 17:29 comprC0D30
crw-rw---- 1 system audio 116, 62 2022-04-21 17:29 comprC0D31
crw-rw---- 1 system audio 116, 63 2022-04-21 17:29 comprC0D32
crw-rw---- 1 system audio 116, 65 2022-04-21 17:29 comprC0D40
crw-rw---- 1 system audio 116, 66 2022-04-21 17:29 comprC0D41
crw-rw---- 1 system audio 116, 67 2022-04-21 17:29 comprC0D42
crw-rw---- 1 system audio 116, 68 2022-04-21 17:29 comprC0D43
crw-rw---- 1 system audio 116, 69 2022-04-21 17:29 comprC0D44
crw-rw---- 1 system audio 116, 57 2022-04-21 17:29 comprC0D8
crw-rw---- 1 system audio 116, 2 2022-04-21 17:29 controlC0
crw-rw---- 1 system audio 116, 77 2022-04-21 17:29 hwC0D10
crw-rw---- 1 system audio 116, 70 2022-04-21 17:29 hwC0D1000
crw-rw---- 1 system audio 116, 90 2022-04-21 17:29 hwC0D103
......
Device boot is ok, launcher is shown, I believe the sound problems has noting to do with kernel modules, because no kernel modules is installed concerning the sound even before I replaced the kernel:
bonito:/ # lsmod
Module Size Used by
wlan 9457664 0
synaptics_dsx_rmi_dev 24576 0
synaptics_dsx_test_reporting 53248 0
synaptics_dsx_fw_update 53248 0
synaptics_dsx_core 61440 3 synaptics_dsx_rmi_dev,synaptics_dsx_test_reporting,synaptics_dsx_fw_update
Why is there no sound device found under /dev/snd/ after my replacing kernel for my Pixel 3a XL (bonito), did I miss something important? The why I replace the kernel:
- copy Image.lz4 to aosp source tree
- build boot.img from aosp source tree
- flash boot.img and replace needed kernel modules
I got all the wifi touch screen work but audio, any body know the reason? Please help!
Sources
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Source: Stack Overflow
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