I have a computer with a Asus P5W DH DeLuxe mainboard and Intel HD
on-board sound chip. I am running Debian Testing, up to date as of
yesterday, with a 2.6.23 kernel.
cat /proc/asound/cards:
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xfebfc000 irq 17
I've had a LOT of trouble in getting Alsa to work with sound input via
a microphone. Sound output via the speakers has never been a problem.
The biggest problem is that the input sound is so inconsistent. For
example - a few days ago I was running a 2.6.22.6 kernel and, after a
lot of fiddling with mixer controls, I managed to get reasonable
quality and volume of recorded sound. Then I upgraded the kernel as
above. After that the sound actually improved a little and I even had
to reduce input and output volume levels. Then I needed to reboot the
machine and I ended up with sound that I could barely hear coupled with
a tremdous hum - same kernel, same mixer settings. After many, many
adjustments I decided that it was unusable in that state and left it.
This morning I find that the hum has gone and although the sound volume
level was low it could be improved using the 'mic boost' and there was
no hum.
My computer normally runs 24 hours a day so it wasn't changed in any
way between yesterday and today.
So I'm baffled. I seem to have these problems regularly if anything
does change e.g. Debian updates, new kernel, computer reboot (not very
often) and so on.
I'm beginning to think that my machine is haunted.
Will it ever be possible to get a stable Alsa system?
--
Barry Samuels
http://www.beenthere-donethat.org.uk
The Unofficial Guide to Great Britain
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