Comment 12 for bug 58339

I had a similar problem, that has been solved: Ext Amplifier can remain unmuted, but line jack sense AND headphone jack sense need to be both turned off.

However, what is odd is that in Edgy sound worked fine (that is under the 2.6.17 kernel), however it did not work fine under Feisty (both the 2.6.19 and the 2.6.20 kernel). So I'm guessing there is nonetheless some bug in the module.

Kind regards