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I've a Acer Swift 3 laptop running Ubuntu 20.04.2 LTS.

Recently I started getting the following message continuously in my dmesg:

[ 1850.107303] sdw_cdns_irq: 163616 callbacks suppressed
[ 1850.107307] intel-sdw intel-sdw.0: Bus clash for control word
[ 1850.107334] intel-sdw intel-sdw.1: Bus clash for control word

Does anyone know what it means?

Noticed that this errors comes with linux kernel 5.11 if I downgrade to 5.9 the messge is not shown. I have upgraded to linux kernel 5.13.12-051312-generic the error is not showing anymore.

user3057099
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1 Answers1

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I have the same messages. In addition to a high cpu usage, do you have also this problem?

I managed to solve this by unloading the alsa modules.

sudo alsa unload

however, you will lose the sound.

ref: irq/185-AudioDS using more than 60% of the CPU

I will upgrade to a newer kernel to see if it also works for me.

Zanna
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Cristian Galleguillos
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