Date: Mon, 22 Sep 2014 02:22:04 +0800 From: Denny Lin <dennylin93@hs.ntnu.edu.tw> To: Hans Petter Selasky <hps@selasky.org> Cc: freebsd-usb@freebsd.org Subject: Re: USB device repeatedly disconnected Message-ID: <20140921182204.GD3153@mail.hs.ntnu.edu.tw> In-Reply-To: <541F052A.7000301@selasky.org> References: <20140921155951.GC3153@mail.hs.ntnu.edu.tw> <541F052A.7000301@selasky.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi Hans, On Sun, Sep 21, 2014 at 07:04:42PM +0200, Hans Petter Selasky wrote: > You can try setting: > > hw.usb.no_cs_fail=1 This appears to have no effect--the device still repeatedly disconnects. > Also run usbdump to capture the USB traffic. > > usbdump -i usbus1 -f 7 -vvv -s 65536 A sample dump is available at: http://n.ethz.ch/student/dlin/aos/usbdump.txt Although I didn't understand the dump, I tried tracing the code. The device is disconnected when usb_free_device() is called within uhub_reattach_port() (the repeat part) in sys/dev/usb/usb_hub.c. I'm not sure what triggers this though. -- Denny Lin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20140921182204.GD3153>