From mboxrd@z Thu Jan  1 00:00:00 1970
From: Risto Suominen <risto.suominen@gmail.com>
Subject: Re: snd-powermac @ G4 DA (PowerMac3,
	4) - headphone 	detection doesn't work
Date: Thu, 4 Mar 2010 23:37:41 +0200
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Sounds strange. MM-ing 'Auto Mute' would mean disabling it, so
plugging anything should have no effect.

You could try running alsamixer while plugging in the headphones. This
should be instantly visible: 'Headphone Detection' MM -> OO, 'PC
Speaker' OO -> MM. (when 'Auto Mute' OO)

On my iMac G4 800 MHz, with Tumbler audio and ALSA driver 1.0.22.1,
everything works with snd-powermac.

Risto