Serial ports, even converted ones, should probably be in the "dialout"
group (just like ttyS*). In theory, this should work already -- your
device should have a ttyUSB0 device set up from the "tty" subsystem, and
you should be able to access this.
It looks to me like your program might be trying to communicate with the
converter directly (rather than to the converter's serial port?) The
rule you tried would only affect the /dev/bus/usb device, which is not
normally used for serial communication.
What does the program do? Is it some kind of firmware uploader or
settings changing program?
Could you do the following for me:
1) unplug the device and wait a few seconds
2) run from a terminal: sudo udevmonitor -e > /tmp/udev.log
3) plug the device in, and wait a few seconds
4) stop the command
5) attach the resulting /tmp/udev.log file to this bug report
Thanks
** Changed in: udev (Ubuntu)
Status: New => Incomplete
** Changed in: udev (Ubuntu)
Importance: Undecided => Low
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ftdi_sio device does not work correctly as a normal user
https://bugs.launchpad.net/bugs/198757
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