Re: Failure to recognize device for 45 minutes and Device Disconnects

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On Wed, 19 Mar 2014, Mike Mitchell wrote:

> Please help me narrow down this perplexing mystery:
> 1. USB Mic device takes ~45 minutes to recognize after warm start.
> 2. Same device disconnect sporadically, usually about an hour after it
> was last used.
> 3. Otherwise device works fine for days on end.
> 
> Host: Intel NUC dccp847dye
> Device: CAD U7 Mic
> Kernel:3.5.0-47-generic #71~precise1-Ubuntu SMP Wed Feb 19 22:05:41
> UTC 2014 i686 i686 i386 GNU/Linux
> 
> USBMon trap of first activity when device is connected:

This trace doesn't show a 45-minute delay.  It also doesn't show a 
disconnect.  Everything appears to be working normally.

The 3.5 kernel is getting old.  Can you try something more recent, such
as 3.13?

Alan Stern

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