Thanks for reply, Julian.  Yes it is tiny, I hadn't considered thermal issues.  
Its size is why I like the thing, very unobtrusive in my laptop (while I try 
debugging the AR9565 problems I'm having).  I'll give the dongle idea a whirl, 
also try it in my desktop downstairs (also running a decently recent kernel).

Soooo possibly nothing to the whole sleeping-while-holding-a-lock thing? :-)



From: Julian H. Stacey <>
To: Anthony Jenkins <> 
Sent: Wednesday, April 23, 2014 4:38 PM
Subject: Re: urtwn panic

Anthony Jenkins wrote:
> I'm getting a panic with the latest kernel (r264719) and the if_urtwn driver.

Might the urtwn device overheat, not return & cause a panic ?
My urtwn device is very small, no thermal path to dump heat.  I've
not tried on current, but on 10.0-RELEASE I saw my urtwn0 interface
disappearing; I read parts of the driver; & noticed there's mention
of a temperature level, I didn't tweak it, but hung my device on a
USB extension cable at 10 C outside the window, & later in front
of a chassis input fan at ~ 20 C room temp., I think both locations
lasted longer or perhaps indefinately without urtwn0 , can't remember,
I suspended pursuing it.  Device picture for those who don't know
how small this, & other URLs via:

Julian Stacey, BSD Unix Linux C Sys Eng Consultant, Munich
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