revision higher than 250508 breaks webcam support

[Adrian Chadd]

'ola!

Cool, you've nailed it down to a specific revision.

Can you create a PR (www.freebsd.org/send-pr.html) with all of this information?

Hans/USB folk - here's an interesting problem. The original email is below.

===

Sorry, for waiting this long to post this problem, I thought it would
be dealt with this week, but since it wasn't better to report it now.
I hope this is the right mailing list for this particular problem.

I am running FreeBSD 9.1-STABLE and using Logitech Webcam C525. I it's
not listed amongst the supported hardware, but it was working
perfectly until the updates that came this Sunday, 2013-05-12.

The problem I'm getting is this:

I keep getting this error message from the kernel, if I'm using
9.1-STABLE r250707

...
pcm6: detached
ugen7.2: <vendor 0x046d> at asbus7
uaudio0: <vendor 0x046d HD Webcam C525, class 239/2, rev 2.00/0.10,
addr 2> on usbus7
uaudio0: No playback.
uaudio0: Record: 48000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record: 32000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record: 24000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio: No MIDI squencer.
pcm6: <USB audio> on uaudio0
uaudio0: No HID volume keys found.
ugen7.2: <vendor 0x046d> at usbus7 (disconnected)
uaudio0: at uhub7, port4, addr 2 (disconnected)
pcm6: detached
...

This message is displayed periodically "ad infinitum" or at least
until I unplug the webcam. It stays this way, even if I use the
GENERIC kernel. In a "healthy" case, revision 250508, kernel message
upon plugging the webcam, is

...
ugen7.2: <vendor 0x046d> at usbus7
uaudio0: <vendor 0x046d HD Webcam C525, class 239/2, rev 2.00/1.00,
addr2> on usbus7
uaudio: No playback.
uaudio: Record: 48000 Hz, 1 ch, 16 bit S-LE PCM format, 2x8ms buffer.
uaudio: No MIDI sequencer.
pcm6: <USB audio> on uaudio0
uaudio0: No HID volume keys found.

And there it stops, and the webcam works in Skype.

===


adrian

On 17 May 2013 04:14, Jože Zobec <jozze.zepl at gmail.com> wrote:
> OK, I compiled and tried different revisions
> r250559 -- OK
> r250560 -- OK
> r250561 -- error
>
> Upon updating from r250560 to r250561, svn give me
>
> ...
> U       /usr/src/sys/dev/sound/usb/uaudio.c
>  U      /usr/src/sys/dev
>  U      /usr/src/sys
> ...
>
> I tried
>
> # svn diff -r 250560:250561 /usr/src | less
>
> to see if I could localize the problem even further, but there are a lot of
> changes so I don't know where it could go wrong, since I'm not the one who
> wrote it.
>
> I am looking forward to your fast reply,
>
> Jože