I think I have the same problem with my Toshiba Tecra M10-15M. I'm using Ubuntu
9.10 64bit. Multimedia from lshw:
*-multimedia
description: Audio device
product: 82801I (ICH9 Family) HD Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: p...@0000:00:1b.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=HDA Intel latency=0
resources: irq:22 memory:ca100000-ca103fff
$ uname -a
Linux 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64
GNU/Linux
I have tried to capture the sound from the microphone with audacity, when I
noticed, that the DC level of the signal is changing, depending on the position
of the volume slider. When I increased the volume the DC level increased also.
I've also tried to plug a signal generator to the microphone input jack. With
large (let's say 200mV peak to peak) input signals the sound card worked as it
should.
I've installed a native windows XP and repeated the test above. The results are
interesting. I have started recording in audacity and moved the volume slider
up and down, and it captured this: http://users.hszk.bme.hu/~kn652/82801I.png .
So there is a highpass filter somewhere in the windows driver, which is not
inplemented in Linux. So I think its a kernel problem.
--
Internal mic not working: 82801I (ICH9 Family), STAC9xx
https://bugs.launchpad.net/bugs/462575
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
