Date: Tue, 11 Oct 2011 00:04:59 -0600 From: PseudoCylon <moonlightakkiy@yahoo.ca> To: Chuck Burns <break19@gmail.com>, Gary Palmer <gpalmer@freebsd.org> Cc: freebsd-net@freebsd.org, Adrian Chadd <adrian@freebsd.org>, Arnaud Lacombe <lacombar@gmail.com> Subject: Re: [urtw] Wifi link dying randomly. reboot required to reconnect. Message-ID: <CAFZ_MY%2Bu=z7p%2BJdYeoU4hkh3vwzqTtMV0LV0Ddw26PmqhcJBwA@mail.gmail.com>
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> Date: Thu, 6 Oct 2011 19:02:15 -0500 > From: Chuck Burns <break19@gmail.com> > Subject: Re: [urtw] Wifi link dying randomly. reboot required to > =A0 =A0 =A0 =A0reconnect. > To: Gary Palmer <gpalmer@freebsd.org> > Cc: freebsd-net@freebsd.org > Message-ID: <201110061902.15838.break19@gmail.com> > Content-Type: Text/Plain; =A0charset=3D"iso-8859-1" > > > options =A0 =A0 =A0 =A0 KDB =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 # Ker= nel debugger related code > options =A0 =A0 =A0 =A0 KDB_TRACE =A0 =A0 =A0 =A0 =A0 =A0 =A0 # Print a s= tack trace for a panic > #options =A0 =A0 =A0 =A0KDB_UNATTENDED =A0 =A0 =A0 =A0 =A0# Reboot on pan= ic > options WITNESS # add me With run(4) (another usb dangle), there is a LOR between node lock and driver lock in if_raw_xmit(). Maybe, stuck on sending mgmt frames -> hang/disconnected from AP? With run(4), the LOR hasn't caused dead lock in 11abg mode, but in 11n mode, it causes dead lock every time. You run it in 11g mode, but it might be having bad hair day occasionally. Next time, rather than unplugging the device to induce a panic, wait and see if the computer will completely be locked up. AK
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