Arch Linux

svrmirac

Member

Registered: 2017-08-04

Posts: 15

Workaround for the 60 Hz/Cycle hum on old audio amp connected

This might be obvious but it took me a while to find so, here's the solution anyway.

I recently changed my motherboard to one with ALC892 audio controller, after which my audio amp (from '79 or '80, connected with a 3.5mm cable) started producing the 60 cycle hum whenever audio was idle for a while. This didn't happen with the ALC888S/ALC885 controller on the previous motherboard.

The workaround is to disable PulseAudio's module-suspend-on-idle module, which, I guess, then keeps some sort of audio workload going on from the moment the system is up. Doesn't seem to affect CPU much.

To disable it, comment its line out in /etc/pulse/default.pa and reboot.

Can't say yet if this causes other problems.

WorMzy

Forum Moderator

From: Scotland

Registered: 2010-06-16

Posts: 11,846

Website

Re: Workaround for the 60 Hz/Cycle hum on old audio amp connected

Thank you for sharing. Ideally, this sort of information should be documented on the wiki, where it can be maintained (although I suspect this is a rather niche subject, so maintainers may be few and far between). If you're feeling up to it, please create a new page under your namespace and document this there.

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Sakura:-
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