On 12/21/06, Takashi Iwai <tiwai@xxxxxxx> wrote:
> At Thu, 21 Dec 2006 09:23:55 -0800,
> Pete Zaitcev wrote:
> >
> > On Wed, 20 Dec 2006 11:34:48 -0500, "Jon Smirl" <jonsmirl@xxxxxxxxx> wrote:
> >
> > Adding list to cc:
> >
> > > My new WebCam is a USB audio device and so is my sound system, PSC805.
> > > When I boot sound doesn't initially work. If I unplug the PSC805 and
> > > plug it back in again I get this. I don't get this using only one
> > > device at a time.
> > >
> > > [ 176.243298] usb 2-2: configuration #1 chosen from 1 choice
> > > [ 176.298092] kobject_add failed for card1 with -EEXIST, don't try to register things with the same name in the same directory.
> > > [ 176.298125] [<c01e690f>] kobject_add+0x10f/0x190
> > > [ 176.298156] [<c023d1b7>] device_add+0xb7/0x530
> > > [ 176.298177] [<c01e65df>] kobject_get+0xf/0x20
> > > [ 176.298184] [<c01e69eb>] kobject_init+0x2b/0x40
> > > [ 176.298201] [<c023d6c8>] device_create+0x88/0xc0
> > > [ 176.298220] [<f8a21b87>] snd_card_register+0x2b7/0x320 [snd]
> > > [ 176.298253] [<f8867c74>] usb_driver_claim_interface+0x84/0xb0 [usbcore]
> >
> > Jon, sorry for the finger-pointing, but you better take it up with ALSA
> > people. It seems that snd_usb_audio_create calls snd_card_new incorrectly,
> > but I have no idea what the constrains on the ID are, so I won't try to
> > make a patch here.
>
> Is it 2.6.20 kernel?
2.6.20 patched with the ehci patches from mm. But it happens without
the mm patches too.
>
> How is the status of /sys/class/sound before and after unplugging a
> device?
Plugged-in at boot:
jonsmirl@jonsmirl:/sys/class/sound$ ls
audio card0 controlC0 dsp mixer pcmC0D0c pcmC1D0p
audio1 card1 controlC1 dsp1 mixer1 pcmC1D0c timer
jonsmirl@jonsmirl:/sys/class/sound$ cat /proc/asound/cards
0 [Camera ]: USB-Audio - USB Camera
OmniVision Technologies, Inc. USB Camera at
usb-0000:00:1d.1-1, full speed
1 [U0x4710x155 ]: USB-Audio - USB Device 0x471:0x155
USB Device 0x471:0x155 at usb-0000:00:1d.7-4.4, full speed
jonsmirl@jonsmirl:/sys/class/sound$ ls /proc/asound
Camera card0 card1 cards devices hwdep modules oss pcm seq
timers U0x4710x155 version
jonsmirl@jonsmirl:/sys/class/sound$ ls /proc/asound/card1
id oss_mixer pcm0c pcm0p stream0 usbbus usbid
jonsmirl@jonsmirl:/sys/class/sound$
[U0x4710x155 ] is not normal, for some reason it didn't get the
device name on this boot. Could be because I did a long fsck at boot.
Unplug it:
jonsmirl@jonsmirl:/sys/class/sound$ ls
audio card0 card1 controlC0 dsp mixer pcmC0D0c timer
jonsmirl@jonsmirl:/sys/class/sound$ cat /proc/asound/cards
0 [Camera ]: USB-Audio - USB Camera
OmniVision Technologies, Inc. USB Camera at
usb-0000:00:1d.1-1, full speed
jonsmirl@jonsmirl:/sys/class/sound$ ls /proc/asound
Camera card0 cards devices hwdep modules oss pcm seq timers version
jonsmirl@jonsmirl:/sys/class/sound$
No error in dmesg yet
Plug it back in
error is in dmesg
jonsmirl@jonsmirl:/sys/class/sound$ ls
audio card0 controlC0 dsp mixer pcmC0D0c pcmC1D0p
audio1 card1 controlC1 dsp1 mixer1 pcmC1D0c timer
jonsmirl@jonsmirl:/sys/class/sound$ cat /proc/asound/cards
0 [Camera ]: USB-Audio - USB Camera
OmniVision Technologies, Inc. USB Camera at
usb-0000:00:1d.1-1, full speed
1 [PSC805 ]: USB-Audio - Philips PSC805
Philips Electronics Philips PSC805 at
usb-0000:00:1d.7-4.4, full speed
jonsmirl@jonsmirl:/sys/class/sound$ ls /proc/asound/card1
id oss_mixer pcm0c pcm0p stream0 usbbus usbid
jonsmirl@jonsmirl:/sys/class/sound$
>
>
> Takashi
>
--
Jon Smirl
jonsmirl@xxxxxxxxx
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