Hi Clemens
Clemens Ladisch wrote:
Hartmut Geissbauer wrote:
I own a piece of hardware called Noah EX. It's a tactive
instrument modeller.
My goal is to get this device working with the alsa usb driver,
because the output of lsusb -v leads me to the hope, that it has a
standard usb audio interface.
...
Interface Descriptor:
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
...
bInterfaceSubClass 2 Streaming (= PCM)
...
bInterfaceSubClass 3 Non Streaming (= MIDI)
Well, this device indeed has standard descriptors.
What I discoverd yet, is that the device is offering two
configurations. And the second is the audio and midi related one.
The first seems to be the configuration channel.
Feb 5 00:28:33 chief kernel: usb 1-2.4: configuration #1 chosen from 2 choices
The problem is that the kernel automatically selects the first
configuration. Please try the patch below.
HTH
Clemens
sorry for responding that late. I've been out for skiing for a few days.
I tried the patch applying it at last to kernel 2.6.3-rc-2 to get away
from the unresolved symbol usb_get_device_descriptor.
So now the dmesg command shows me:
hub 1-2:1.0: port 4, status 101, change 1, 12 Mb/s
hub 1-2:1.0: debounce: port 4: delay 100ms stable 4 status 0x101
hub 1-2:1.0: port 4 not reset yet, waiting 10ms
usb 1-2.4: new full speed USB device using address 3
usb 1-2.4: new device strings: Mfr=1, Product=2, SerialNumber=0
drivers/usb/core/message.c: USB device number 3 default language ID
0x409
usb 1-2.4: Product: CreamWare Noah Synthesizer
usb 1-2.4: Manufacturer: CreamWare GmbH
drivers/usb/core/usb.c: usb_hotplug
usb 1-2.4: configuration #1 chosen from 2 choices
usb 1-2.4: registering 1-2.4:1.0 (config #1, interface 0)
drivers/usb/core/usb.c: usb_hotplug
snd-usb-audio 1-2.4:1.0: usb_probe_interface
snd-usb-audio 1-2.4:1.0: usb_probe_interface - got id
The device is not appearing in /proc/asound.
After that action, the usb-stack is stuck. Not recognizing any new
connects or disconnects. I tried to compile the kernel with ohci (that's
my controller type) as a module and built in.
The same behaviour appears after removing a M-Audio Midisport4x4 from
the usb port. It works only one time. (Plugging it in, it is working,
plug it out, the usb stack is dead)
So it seems, that there is something wrong with the usb stack in 2.6.x
Hartmut
--
Hartmut Geissbauer [EMAIL PROTECTED]
---
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356alloc_id=3438op=click
___
Alsa-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-devel
