Just installed Elementary OS 6.1 on my HP x2 Detachable 10-p0XX, everything was working just fine (sound too). After updating all apps from app center and rebooting device, sound got lost. I can see my audio device in alsamixer, it is unmuted, I can control volume using both tray icon and alsamixer, but the speakers don't make a sound.

cat /proc/asound/cards gives mi following:

 0 [Audio          ]: HdmiLpeAudio - Intel HDMI/DP LPE Audio
                      Intel HDMI/DP LPE Audio
 1 [rt5640         ]: SOF - sof-bytcht rt5640

I've tried reinstalling pulseaudio, setting rt5640 as default by creating /etc/asound.conf. Nothing changed.

Is there a way to fix it without reinstalling system?


built-in mixer

1 Answer 1


Got it by unmuting DAC MIXL, DAc MIXR, SPOR MIX DAC R1, SPOR MIX DAC L1 for my speakers, and all HP and HPO with Stereo DAC MIXR DAC L1&R1 for my headset using alsamixer.

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