Problems with hda

[Daniel O'Connor]

On 04/11/2010, at 19:41, Doug Barton wrote:
> hdac0: <Intel 82801JD High Definition Audio Controller> mem 0xf7adc000-0xf7adffff irq 16 at device 27.0 on pci0
> hdac0: HDA Driver Revision: 20100226_0142
> hdac0: HDA Codec #0: Analog Devices AD1984A
> pcm0: <HDA Analog Devices AD1984A PCM #0 Analog> at cad 0 nid 1 on hdac0
> pcm1: <HDA Analog Devices AD1984A PCM #1 Analog> at cad 0 nid 1 on hdac0
> 
> There's 2 problems. When I plug the headphones in there are sounds, sometimes a low-level sound like a tea kettle whistling, and sometimes a louder screeching sound. The other problem is that the front headphone jack doesn't work. The rear one works, but this is less than convenient. :)  Windows and ubuntu linux do not have either problem with the same hardware.

Try
sysctl hw.snd.default_unit=1

You have 2 separate outputs, almost certainly one is the rear and one is the front.

The noise you hear might be fixable using mixer to mute any other sources but PCM.

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C