Re: [9front] Audio in Lenovo T400

[sl@stanleylieber.com]

> I've bought Lenovo Thinkpad T400 to run 9front on it. The only pice of 
> hardware that is not working right now is audio device. I've tested it 
> with play(1) and some ogg file and I can hear no sound. Master in 
> /dev/volume is set to 100 so i believe that i should hear something.
> 
> Now I have several questions regarding this problem.

First, let's establish that your audio card is recognized by the
kernel. Can you run sysinfo -p and let us know the URL that is
returned by the command?

It looks like we already have sysinfo for two different models of
ThinkPad T400, one of which claims to have:

	Intel Corporation 486486 82801IB/IR/IH (ICH9 Family) HD Audio Controller


From the sysinfo:

	% cat '#'A/audiostat
	bufsize   1024 buffered      0
	codec 0 pin 22 inpin 29
	aout 16 c1d
	aout 17 c1d
	aout 18 211
	beep 19 70000c
	ain 20 100d1b ← pin 29, pin 23
	ain 21 100d1b ← pin 24
	pin 22 out jack ext front hpout green ← aout 16, aout 17
	pin 23 in nothing sep rear micin pink
	pin 24 in jack ext front micin pink
	pin 25 out nothing ext N/A other ? ← aout 16, aout 17
	pin 26 out fix int N/A speaker ? eapd ← aout 16, aout 17
	pin 27 out nothing ext N/A other ? eapd ← aout 16, aout 17
	pin 28 out nothing ext N/A other ? ← aout 18
	pin 29 in fix int N/A micin ?
	beep 30 f00000
	outpath aout 16 → pin 22
	outamp aout 16
	inpath pin 29 → ain 20
	inamp ain 20


So, on this machine, pin 22 was chosen as the default. This should
be the lineout (headphone) port. For this machine, it looks like you
want pin 26 for the internal speaker. You can set the pin like this:

	% echo pin 26 >/dev/audioctl


and then verify it like this:

	% cat /dev/audiostat


If this works, you can add it to /cfg/$sysname/termrc or whatever
other method you prefer to configure the correct pin at boot time.

sl