Dell Chromebook 11 3100 no sound out, speaker & headphone

fengyiyi · 2022 年6 月 14 日 04:49

Device：Dell Chromebook 11 3100

CPU：CPU：Intel(R) Celeron(R) N4000 CPU * Gemini Lake*

Version of FydeOS ：FydeOS for PC v13-sp1；Full disk installation using the installer

Malfunction：no sound out, speaker & headphone, volume adjustment is invalid, automatically reset to 0

I have extracted the original Chromeos image file, here:

chromebook\lib\modules\4.14.272-18805-g12d6850827f5\kernel\sound

Hope this helps

fengyiyi · 2022 年6 月 14 日 04:55

user24 · 2022 年6 月 14 日 05:00

uname -ra
lsmod
aplay -l
cat /proc/asound/cards
amixer

fengyiyi · 2022 年6 月 14 日 05:07

thx, but i’m just a chromebook user not a developer. please help me more detailed steps, thank you.

user24 · 2022 年6 月 14 日 05:23

what about this folder？

fengyiyi · 2022 年6 月 14 日 05:43

fengyiyi · 2022 年6 月 14 日 05:45

can i copy&replace

\usr\share\alsa\ucm

and

\lib\modules\4.14.272-18805-g12d6850827f5\kernel\sound

to solve the problem?

user24 · 2022 年6 月 14 日 05:49

Just copy UCM
first unlock system read-only。
mount -o remount rw /

fengyiyi · 2022 年6 月 14 日 09:57

must be superuser to use mount
show this,what i do now.

user24 · 2022 年6 月 14 日 10:29

fengyiyi · 2022 年6 月 14 日 14:10

I did the following

1
sudo -su
2
cp -r /home/chronos/user/Download/ucm /usr/share/alsa/

and

cd /usr/share/alsa/ucm
ls

Looks like it worked.
but still no sound after chromebook restart.