via82xx: how to get microphone working?

via82xx: how to get microphone working?

[Németh Márton]

Hi,

I have a Clevo D410J laptop with the following integrated sound card:

00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 50)
        Subsystem: CLEVO/KAPOK Computer Unknown device 4702
        Flags: medium devsel, IRQ 20
        I/O ports at 1400 [size=256]
        Capabilities: [c0] Power Management version 2
        Kernel driver in use: VIA 82xx Audio
        Kernel modules: snd-via82xx

There is also an integrated modem which also appears in kmix/alsamixer:

00:11.6 Communication controller: VIA Technologies, Inc. AC'97 Modem Controller (rev 80)
        Subsystem: CLEVO/KAPOK Computer Unknown device 4702
        Flags: medium devsel, IRQ 20
        I/O ports at 1800 [size=256]
        Capabilities: [d0] Power Management version 2
        Kernel driver in use: VIA 82xx Modem
        Kernel modules: snd-via82xx-modem

I am using Linux 2.6.23. I enabled the microphone input, increased the microphone
record level to maximum, and enabled "Mic Boost". I can hear my voice through the
speakers, but I cannot record sound (for example Skype cannot record my sound). The
playback is working fine without any problem.

Is there any setting I miss?


$ lsmod |grep snd
snd_via82xx            22572  1
snd_mpu401_uart         7064  1 snd_via82xx
snd_seq_oss            29328  0
snd_seq_midi            6432  0
snd_seq_midi_event      6536  2 snd_seq_oss,snd_seq_midi
snd_via82xx_modem      11408  1
snd_ac97_codec         95676  2 snd_via82xx,snd_via82xx_modem
ac97_bus                2432  1 snd_ac97_codec
snd_pcm_oss            38208  0
snd_mixer_oss          14216  1 snd_pcm_oss
snd_seq                45752  5 snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_pcm                69420  4 snd_via82xx,snd_via82xx_modem,snd_ac97_codec,snd_pcm_oss
snd_timer              19356  2 snd_seq,snd_pcm
snd_rawmidi            19136  2 snd_mpu401_uart,snd_seq_midi
snd_seq_device          6932  4 snd_seq_oss,snd_seq_midi,snd_seq,snd_rawmidi
snd                    45476  16
snd_via82xx,snd_mpu401_uart,snd_seq_oss,snd_via82xx_modem,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_seq,snd_pcm,snd_timer,snd_rawmidi,snd_seq_device
snd_page_alloc          8072  3 snd_via82xx,snd_via82xx_modem,snd_pcm
soundcore               6496  1 snd


Regards,

	Márton Németh

Re: via82xx: how to get microphone working?

[Clemens Ladisch]

Németh Márton wrote:
> I enabled the microphone input, increased the microphone record level
> to maximum, and enabled "Mic Boost". I can hear my voice through the
> speakers, but I cannot record sound.

This looks as if you've set the playback level and not the record level
of the microphone.  In alsamixer, use F3/F4 to switch between playback
and record controls.


HTH
Clemens

Re: via82xx: how to get microphone working?

[Németh Márton]

Clemens Ladisch wrote:
> Németh Márton wrote:
>> I enabled the microphone input, increased the microphone record level
>> to maximum, and enabled "Mic Boost". I can hear my voice through the
>> speakers, but I cannot record sound.
> 
> This looks as if you've set the playback level and not the record level
> of the microphone.  In alsamixer, use F3/F4 to switch between playback
> and record controls.

Thanks a lot, that was the solution.

In alsamixer I pressed F4 to reach the "[Capture]" settings. At "Mic" the red
"CAPTUR" text was there. What was missing is that at "Capture" the red "CAPTUR"
text was not there. I had to navigate to "Capture" and press the SPACE bar. I
also had to increase the level of "Capture" with the up/down arrows.

What I recognised that in KMix 2.6.1 (KDE 3.5.8) there is a "Capture" level
adjuster, but its level is not connected with the "Capture" level in AlsaMixer
v1.0.16. But maybe that's a KMix problem.

Thanks again,

	Márton Németh