On 26/04/17, Greg KH wrote: > On Tue, Apr 25, 2017 at 11:11:38PM +0200, Oliver Graute wrote: > > Hello list, > > > > i'am using a null modem cable with two usb to serial converts on both > > ends between my develop and my target machine. The connection is fine. > > On both machines the serial interface is /dev/ttyUSB0 for this connection. > > > > On the target machine I try to enable kgdboc > > > > echo ttyUSB0 > /sys/module/kgdboc/parameters/kgdboc > > > > but only got: > > > > echo write error: No such device > > > > if I try: > > > > echo ttyS0 > /sys/module/kgdboc/parameters/kgdboc > > > > is not complaining. Some ideas why ttyUSB0 can't be used with kgdb? > > USB needs interrupts in order to run properly, which kgdb doesn't enable > when you stop the target, for obvious reasons :) ok that make sense > Stick to a "real" serial connection and you should be fine. thats not so easy. Even the old notebooks today lacks a "real" serial connection. Perhaps I should use a raspberry as target. There I can get a serial over the gpios. Best Regards, Oliver _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
