The following reply was made to PR usb/179505; it has been noted by GNATS.
From: Mike Meyer <m...@mired.org>
To: Hans Petter Selasky <h...@bitfrost.no>
Subject: Re: usb/179505: Kernel detaches Arduino Leonardo (and similar) board
umodem after the arduino boots
Date: Fri, 28 Jun 2013 12:15:40 -0500
On Fri, Jun 28, 2013 at 4:09 AM, Hans Petter Selasky <h...@bitfrost.no> wrote:
> Hi Mike,
> I was not able to reproduce this issue yet. From the logs you sent I see:
> That the INTERRUPT endpoint is stalling:
> Then the USB stack will try to clear the stall. And the clearing of stall
> also fails:
> These messages are mandatory to implement per usb.org specifications. And I
> know Linux and Windows does not use these very much. In other words I looks
> like the Arduino could need some more USB certification!
> After a given amount of stalling, the FreeBSD USB stack will reset the
> device, which gives you the re-enumeration you are observing.
> This case can be prevented by setting:
> sysctl hw.usb.no_cs_fail=1
> Then try again!
Thanks for looking into this.
Unfortunately, it didn't solve the problem for me. The leonardo still
creates the umodem devices, then detaches them as the IPL finish.
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