If you like playing with Arduino devices, like I do, you need to have
serial port access. These days the easiest way to do that is over USB.
Under Fedora 11, If you plug in an FTDI FT232R uart in order to get
serial access over USB, the resulting device could show up with these
permissions:
# ls -al /dev/ttyUSB*
crw-rw----. 1 root dialout 188, 0 2009-05-03 10:24 /dev/ttyUSB0
To actually have access to the device, the user must become a member of
the dialout group. Once you add yourself to the group, you log out and
log in and access is magically granted.
This restriction is not consistent with how Fedora 10 works. I didn't
have this problem there.
For context, here are the kernel messages I got when I plugged in the
device:
May 3 10:24:15 deafeng3 kernel: usb 6-1: new full speed USB device
using uhci_hcd and address 2
May 3 10:24:16 deafeng3 kernel: usb 6-1: New USB device found,
idVendor=0403, idProduct=6001
May 3 10:24:16 deafeng3 kernel: usb 6-1: New USB device strings: Mfr=1,
Product=2, SerialNumber=3
May 3 10:24:16 deafeng3 kernel: usb 6-1: Product: FT232R USB UART
May 3 10:24:16 deafeng3 kernel: usb 6-1: Manufacturer: FTDI
May 3 10:24:16 deafeng3 kernel: usb 6-1: SerialNumber: A8007UF2
May 3 10:24:16 deafeng3 kernel: usb 6-1: configuration #1 chosen from 1
choice
May 3 10:24:16 deafeng3 kernel: usbcore: registered new interface
driver usbserial
May 3 10:24:16 deafeng3 kernel: USB Serial support registered for generic
May 3 10:24:16 deafeng3 kernel: usbcore: registered new interface
driver usbserial_generic
May 3 10:24:16 deafeng3 kernel: usbserial: USB Serial Driver core
May 3 10:24:16 deafeng3 kernel: USB Serial support registered for FTDI
USB Serial Device
May 3 10:24:16 deafeng3 kernel: ftdi_sio 6-1:1.0: FTDI USB Serial
Device converter detected
May 3 10:24:16 deafeng3 kernel: usb 6-1: Detected FT232RL
May 3 10:24:16 deafeng3 kernel: usb 6-1: FTDI USB Serial Device
converter now attached to ttyUSB0
May 3 10:24:16 deafeng3 kernel: usbcore: registered new interface
driver ftdi_sio
May 3 10:24:16 deafeng3 kernel: ftdi_sio: v1.4.3:USB FTDI Serial
Converters Driver
May 3 10:24:16 deafeng3 NetworkManager: <info> (ttyUSB0): ignoring due
to lack of mobile broadband capabilties
May 3 10:37:14 deafeng3 yum: Installed: avrdude-5.5-4.fc11.x86_64
May 3 10:47:06 deafeng3 pcscd: winscard.c:309:SCardConnect() Reader
E-Gate 0 0 Not Found
May 3 10:47:06 deafeng3 pcscd: winscard.c:309:SCardConnect() Reader
E-Gate 0 0 Not Found
May 3 10:47:06 deafeng3 pcscd: winscard.c:309:SCardConnect() Reader
E-Gate 0 0 Not Found
May 3 10:47:06 deafeng3 pcscd: winscard.c:309:SCardConnect() Reader
E-Gate 0 0 Not Found
Thanks
Bob
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