Date: Tue, 27 Dec 2011 15:51:10 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: =?utf-8?b?0JzQvtC80YfQuNC7INCY0LLQsNC90L7Qsg==?= <momchil@xaxo.eu> Cc: freebsd-usb@freebsd.org Subject: Re: USB problems with 8.2 Message-ID: <201112271551.10626.hselasky@c2i.net> In-Reply-To: <86aa6egjsq.wl%momchil@xaxo.eu> References: <86ipl3dl5q.wl%momchil@xaxo.eu> <86fwg6w0k1.wl%momchil@xaxo.eu> <86aa6egjsq.wl%momchil@xaxo.eu>
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On Tuesday 27 December 2011 15:40:05 Момчил Иванов wrote: > At Tue, 27 Dec 2011 15:29:02 +0100, > > Момчил Иванов wrote: > > At Tue, 27 Dec 2011 15:17:42 +0100, > > > > Hans Petter Selasky wrote: > > > Did you check for errors in dmesg? > > > > > > Also have you tried setting: > > > > > > hw.usb.ehci.lostintrbug=1 > > does not seem to help at all, it seems to make things even worse - the > stalls become more frequent... other ideas? > Hi, If you compile a kernel with "options USB_DEBUG". Then when the problem appears, you enable umass debugging: sysctl hw.usb.umass.debug=15 OR: Check activity with usbdump upon failure: usbdump -i usbusX -vvv > log.txt cat log.txt | grep USB_ERR Some USB HDDs might have firmware failures. Most USB HDD enclosures are not 100% hardware and usually contains a small CPU to do USB. --HPS
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