Hi Robert,
On 11.08.2012 17:45, Robert M. Albrecht wrote:
> today came a new kernel, still broken:
>
> [romal@chessur ~]$ uname --all
> Linux chessur.vorlon.lan 3.5.1-1.fc17.x86_64 #1 SMP Thu Aug 9 17:50:43
> UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
> [romal@chessur ~]$
>
> Perhaps the problem is not alsa, but uvc-video or somewhere in the
> usb-stack.
Hmm, I doubt it.
> I have connected a usb webcams,
>
> [root@chessur ~]# lsusb
> Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
> Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 007: ID 0763:2080 Midiman M-Audio RunTime DFU
> Bus 001 Device 008: ID 046d:08c9 Logitech, Inc. QuickCam Ultra Vision
> Bus 001 Device 005: ID 045e:071d Microsoft Corp.
> Bus 001 Device 006: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
> [root@chessur ~]#
>
> When I dis- & reconnect the webcam, the FTU appears in aplay -l.
And before that it doesn't? Is there any scenario in which you can get
sound from the FTU?
Could you apply the patch I attached and send me the output the kernel
produces with that?
Thanks,
Daniel
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 0f647d2..b8d416f 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -864,6 +864,9 @@ int snd_usb_endpoint_start(struct snd_usb_endpoint *ep)
if (err < 0) {
snd_printk(KERN_ERR "cannot submit urb %d, error %d: %s\n",
i, err, usb_error_string(err));
+ snd_printk(KERN_ERR " -- ep_num %x pipe %d\n", ep->ep_num, ep->pipe);
+ snd_printk(KERN_ERR " -- type %d flags %lu\n", ep->type, ep->flags);
+
goto __error;
}
set_bit(i, &ep->active_mask);
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