On Wednesday 20 October 2010 17:30:40 Alexander Best wrote: > hi there, > > i'm running HEAD (r213495; amd64). i stumbled upon this severe problem: > > after attaching my mobile phone, it simply resets without doing mount or > anything. however after letting the device come up again it won't show up > in the console. after detaching it the usb subsystem seemed to have > completely crashed. but that's not all. the following programs now simply > hang without producing any output C-C won't do anything: > > - dmesg > - top > - ps > - killall > - camcontrol devlist > - usbconfig
That's most likely because USB's umass driver is waiting for cam to drain. Possibly some refcounting is not correct. I suspect this is not a USB problem. Try to enter into the debugger, and look for backtrace for function stuck in umass_detach. --HPS _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"