HDA sound driver mod for sigmatel 92xx

[Norberto Meijome]

On Sun, 9 Jul 2006 15:17:24 +0100
Andrea Bittau <a.bittau at cs.ucl.ac.uk> wrote:

> by the way, I got a version which should record stuff too:
> http://darkircop.org/hdac-rec.tgz

Hi all,
I downloaded and tried this last night . It works great, including with Skype
(for me, main reason for having sound really :)  ). Thanks!!

Some things though (and you probably know them already):
 - /usr/sbin/mixer  (6.1 from yesterday) sees 2 devices, vol and rec, but no
recording device (even setting =rec rec doesnt work). BUT setting the volume to
the rec device does work.... strange:


[betom at ayiin] [Mon Jul 17 11:27:36 2006]
/usr/home/betom
$ mixer
Mixer vol      is currently set to 100:100
Mixer rec      is currently set to  90:90
Recording source:

[betom at ayiin] [Mon Jul 17 11:31:36 2006]
/usr/home/betom
$ mixer =rec rec
mixer: unknown recording device: rec
usage: mixer [-f device] [-s | -S] [dev [+|-][voll[:[+|-]volr]] ...
       mixer [-f device] [-s | -S] recsrc ...
       mixer [-f device] [-s | -S] {^|+|-|=}rec rdev ...
 devices: vol, rec
 rec devices:

- How stable is the support for resume on a laptop? I got a couple of crashes
on resume ( one a hard lock, the other what seemed like really slow access to
HD, but in-memory apps were ok...ended up having to hard boot it). Just now, it
has worked fine, so I haven't any hard evidence yet to point it to hdac.ko .

Unloading from devd , suspend, resume, reload from devd works every time, but
hdac cannot be unloaded when XFCE is running as xfce4-panel and
xfce-mcs-manager keep mixer0 open:

[betom at ayiin] [Mon Jul 17 11:31:45 2006]
/usr/home/betom
$ fstat | grep mixer
betom    xfce4-panel  1237   12 /dev        113 crw-rw-rw-  mixer0 rw
betom    xfce-mcs-manager  1223    5 /dev        113 crw-rw-rw-  mixer0 rw

I'm thinking of installing one of the sound daemons (arts ? ) and route
everything sound-related through it. then shut down artsd from my acpi_shutdown
script , unload hdac and bring it back up...  we'll see how that goes.

anyway, thanks for the code :)

Beto