Is there any logic to the order in which usb-serial devices are enumerated when a system starts?
When using multiple usb-serial devices, the program(s) have to know to which port each particular external device is connected. When initially connecting, the first to be plugged in will be /dev/ttyUSB0 and so on. Having connected them all, looking at the output of udevinfo, I can see the bus address to which each port is connected and can create udev rules to create aliases to 'fixed' names which the programs can reference. However when the system was restarted, the mappings were wrong and the bus addresses for some of the ports were swapped. I expected the /dev/ttyUSBx names to change, that is why I tried mapping to the bus ID (eg 1-4.1:1.0). Is there any way to write udev rules which will map the usb-serial device connected to a particular socket on either the PC or a hub to a known name? So that if the usb connector is removed and replaced (in the same socket) or the system is rebooted that programs will be able to open the correct device connected to each usb serial adaptor? -- gentoo-user@gentoo.org mailing list
