From owner-freebsd-usb@FreeBSD.ORG  Fri Aug  7 06:35:47 2009
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From: Hans Petter Selasky <hselasky@c2i.net>
To: Lucius Windschuh <lwindschuh@googlemail.com>
Date: Fri, 7 Aug 2009 08:35:46 +0200
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Cc: freebsd-usb@freebsd.org
Subject: Re: reattach 3g0 device: could not allocate new device
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On Thursday 06 August 2009 23:38:07 Lucius Windschuh wrote:
> 2009/8/6 Hans Petter Selasky <hselasky@c2i.net>:
> > If you kldload u3g after plugging the device? Any change?
>
> (u3g unloaded)
> (plug in UMTS dongle)
> dmesg:
>  (cd0:umass-sim0:0:0:0): READ(10). CDB: 28 0 0 0 51 fc 0 0 1 0
>  (cd0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
>  (cd0:umass-sim0:0:0:0): SCSI Status: Check Condition
>  (cd0:umass-sim0:0:0:0): UNIT ATTENTION asc:0,0
>  (cd0:umass-sim0:0:0:0): No additional sense information
>  (cd0:umass-sim0:0:0:0): Retries Exhausted
>  ... (block is printed repeatedly)
>  (cd0:umass-sim0:0:0:0): cddone: got error 0x6 back
>
> $ kldload u3g
> (nothing happens)
> $ camcontrol eject cd0
>  ugen0.3: <Novatel Wireless> at usbus0 (disconnected)
>  umass0: at uhub0, port 2, addr 3 (disconnected)
>  (cd0:umass-sim0:0:0:0): lost device
>  (cd0:umass-sim0:0:0:0): removing device entry
>  ugen0.3: <Novatel Wireless> at usbus0
>  u3g0: <Data Interface> on usbus0
>  u3g0: Found 2 ports.
>
> This works. Strange, but an interesting hint


Could you edit: 
src/sys/dev/usb/usb_msctest.c

And add a pause("TEST", 2*hz) after "if (do_eject)" and before the eject 
command ?

--HPS