On 11/04/10 12:45, Alexander Motin wrote:
Doug Barton wrote:
Thanks to a generous FreeBSD user I have a shiny new Dell Optiplex 960,
with the following device:
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.
Try to play with mixer. Especially with "speaker", if you have it. Some
unconnected CODEC inputs may receive random radio interference from
other system components.
Bang on! Setting speaker to 0:0 instantly removed the random sounds. I
assumed it was RFI from something, but I was using the windowmaker mixer
app previously and thought I had already adjusted everything to 0. Silly
of me not to check the command line version, thanks for the reminder.
The other problem is that the front headphone
jack doesn't work. The rear one works, but this is less than convenient.
:)
Have you tried to playback via pcm1? It could go exactly there.
2 for 2! The magic is hw.snd.default_unit=1
Windows and ubuntu linux do not have either problem with the same
hardware.
Linux and Windows often have hardcoded drivers for specific hardware.
Our driver tries to be universal and honor standards, unluckily often
violated by BIOS makers.
So, same song, $N'th verse? :)
For more information about CODEC and it's configuration you need to get
verbose dmesg. Details are in snd_hda(4).
Thank you for your excellent help, I learned something today. :)
Doug
--
Nothin' ever doesn't change, but nothin' changes much.
-- OK Go
Breadth of IT experience, and depth of knowledge in the DNS.
Yours for the right price. :) http://SupersetSolutions.com/
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