Hi Doug On Fri, Jun 5, 2009 at 15:40, Mr Doug -<[email protected]> wrote:
> When I connect a USB to serial adapter on my NSLU2 Debian system all is > well... it assigns ttyUSB0. But if I disconnect the cable and then reconnect > it assigns the next port - ttyUSB1 and so on going up. > > Is this normal? I tried deleting the /dev/ttyUSBx files but it still assigns > the next port. Is there a way to delete a port so it can be reassigned? I > know rebooting would solve the problem but I do not want to do that every > time. I've seen this behaviour before, but I've never investigated why it happens. udev should be handling the assignment of device names, so that may be a place to start looking for clues. You may be able to add a udev rule like SUBSYSTEMS=="usb", KERNEL=="ttyUSB*", SYMLINK+="my_USB_serial_device_name" to create a device node /dev/my_USB_serial_device_name which you could use each time. I have not tested this idea. To get some information that you may need to create an appropriate udev rule, try: $ sudo udevadm monitor and insert and remove the USB to serial adapter a few times. If you are not familiar with udev rules (they can be a pain), have a look at http://reactivated.net/writing_udev_rules.html I hope that this information helps. Gordon -- Gordon Farquharson GnuPG Key ID: 32D6D676 -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
