Bose USB Audio No Playback

[Purushotham Nayak]

Yes, That worked! I've got sound now. Thanks so much.

(It's connected directly to my PC)


________________________________
From: Hans Petter Selasky <hselasky at c2i.net>
To: Purushotham Nayak <nayak_purushotham at yahoo.com> 
Cc: "freebsd-usb at freebsd.org" <freebsd-usb at freebsd.org> 
Sent: Wednesday, February 8, 2012 10:34 AM
Subject: Re: Bose USB Audio No Playback

On Wednesday 08 February 2012 00:59:12 Purushotham Nayak wrote:
> Hi Hans,
> 
> 
> When I just run usbconfig I get
> ugen0.2: <Bose USB Audio Bose Corporation> at usbus0, cfg=0 md=HOST
> spd=FULL (12Mbps) pwr=ON
> 
>  I ran,
> usbconfig -d ugen0.2  dump_device_desc dump_curr_config_desc
> I've attached the output with this e-mail.
> 
> I pulled out the bose usb and ran
> sysctl hw.usb.uaudio.debug=15
> and then plugged back in and it's still the same in dmesg. It says No
> Playback.  Interesting my mouse stopped working when I did this.

Hi,

Try this command:

sysctl hw.usb.uaudio.default_channels=6

Then replug your device.

Does it work?

You can also set this in:

/boot/loader.conf

I think the problem is that that your device is having a lot of channels, and 
should really be using High Speed USB. The device might not work correctly 
when connected through a High Speed HUB. Connect it directly to your PC/MAC!

Reference:
/sys/dev/sound/usb/uaudio.c

                switch (usbd_get_speed(udev)) {
                case USB_SPEED_LOW:
                case USB_SPEED_FULL:
                        /*
                        * Due to high bandwidth usage and problems
                        * with HIGH-speed split transactions we
                        * disable surround setups on FULL-speed USB
                        * by default
                        */
                        channels = 2;
                        break;
                default:
                        channels = 16;
                        break;
                }

--HPS