On Sat, 3 May 2014, Russel Hughes wrote:

>  sudo cat /sys/kernel/debug/usb/usbmon/2u > /tmp/1.mon.out
> 
> first few hundred lines
> 
> ffff880200adef00 2596394321 C Zi:2:004:1 0:1:1833:0 1 0:0:3 4 = 00030b00
> ffff880200adef00 2596394330 S Zi:2:004:1 -115:1:1833 1 -18:0:3 4 <
> ffff8801f3c8e600 2596395313 C Zo:2:004:1 0:1:1830:0 5 0:0:264

It looks like you started the usbmon trace after the audio data
transfer was running.  I need to see what happens when the audio data
transfer begins.

Also, is there any way you can turn off the audio-in channel while 
running the test, so that only the audio-out is active?

Alan Stern


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