Re: [LAU] Cracking sound via USB (ALSA urb.c:480: frame 5 active: -18)

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To: Ken Restivo <ken@...>
Cc: <linux-audio-user@...>
Date: Thursday, May 26, 2011 - 9:35 am

Ken Restivo wrote:

That bug in Intel's Rate Matching Hub would corrupt audio data, but
is unlikely to result in error messages from the driver. (Iso packets
have no error correction; corrupted data is just silently ignored.)

> > So not mixing USB1 and USB2 devices but mixing a device performing

The Linux high speed support is somewhat buggy; this affects full
speed devices connected to high speed hubs.

The Rate Matching Hub is internally organized as a high speed hub.

> Wait, what?

Iso/bulk are forbidden only at Low speed (1.5Mbps).

Regards,
Clemens
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Messages in current thread:
Re: [LAU] Cracking sound via USB (ALSA urb.c:480: frame 5 ac..., Aurélien Leblond, (Tue May 24, 11:36 pm)
Re: [LAU] Cracking sound via USB (ALSA urb.c:480: frame 5 ac..., Clemens Ladisch, (Thu May 26, 9:35 am)