On Saturday 22 August 2009 16:48:07 Bruce Cran wrote: > On Mon, 3 Aug 2009 21:27:30 +0200 > > Hans Petter Selasky <hsela...@c2i.net> wrote: > > On Monday 03 August 2009 20:55:16 Alexander Best wrote: > > > just tried settings `sysctl debug.kdb.panic = 1`. if i use this way > > > to enter the kernel debugger my usb keyboard works. if i type > > > "continue" however the kernel panics and the kernel debugger gets > > > yet entered again, but without the keyboard working. > > > > The USB controller which the keyboard is hooked onto will not work > > after panic has been entered, due to some state not being cleaned up. > > > > To increase the chance of the keyboard working on a panic, connect > > the keyboard to a separate USB controller. > > > > > i don't know how to produce backtraces since the keyboard doesn't > > > work. > > > > Ok. > > > > > the other way of entering the debugger without my keyboard working > > > was to simple press "ctrl+ast+esc". > > > > Yes, because most likely the DDB is entered directly from the USB > > keyboard code, and the USB stack does not allow function recursion in > > that case! > > USB keyboard support is now working in the debugger, but it seems > the USB stack hangs up if you exit out of the debugger, if the system > hasn't crashed and can keep running - the keyboard doesn't respond, and > unplugging and re-plugging it doesn't help. > > If I press Ctrl-Alt-Esc followed by "c" to continue, the output scrolls > up the window as if the Enter key is being held down.
This is going to get fixed in a coming USB patchset. Stay tuned. --HPS _______________________________________________ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
