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Dan Farrell <dan@×××××××××.cx> wrote: |
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> On Thu, 18 Oct 2007 14:04:59 -0400 |
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> Willie Wong <wwong@×××××××××.EDU> wrote: |
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> |
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> > Chuanwen: Personally I have never encountered a situation where on a |
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> > laptop the volume control etc. is different between the attached |
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> > speakers and headphones. I've always assumed (someone correct me if |
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> > I am wrong) that the switching between headphones and the attached |
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> > speakers is hardware and not software. |
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> |
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> This is true; the headphone jacks usually have an integrated |
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> disconnect switch for the internal laptop speakers, to be tripped |
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> when a plug is inserted. |
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It's apparently no longer true, at least for newish Intel HDA |
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chipsets. Mine (SigmaTel STAC9872AK) would not switch off the internal |
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speakers when the jack was plugged in, so sound would come from both |
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the headphones and the speakers. A recent patch to the driver fixed |
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this. |
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Sorry this doesn't help the OP any. |
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