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> Cc: freebsd-gnats-sub...@freebsd.org 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: > > DONE-INTR-EP=00000084,SPD=FULL,NFR=1,SLEN=0,IVAL=1,ERR=STALLED > > Then the USB stack will try to clear the stall. And the clearing of stall > also fails: > > DONE-CTRL-EP=00000000,SPD=FULL,NFR=1,SLEN=0,IVAL=0,ERR=STALLED > > 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! > > --HPS Hi Hans, 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. _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"