The device should be root:dialout unless/until you log in on that terminal, when it is correctly changed to pi:tty. Ok, that was misleading. udev sets the device to root:dialout, but getty sets it to root:tty immediately, and login changes it to pi:tty. (There may be some race condition or trigger ...

Also tried with Bodhi. Result is the same.

With a usb-rs232 dongle:

For both graphical and nongraphical pi user: pi@raspberrypi ~ $ ls -la /dev/ttyAMA0 crw-rw---- 1 root tty 204, 64 Ara 28 12:59 /dev/ttyAMA0 raspbian wheezy 2012-10-28 fully updated. So, it looks like with raspbian this device's group is tty not dialout. My goal is to use my serial programs as simple...

I want to change the group of /dev/ttyAMA0 from tty to dialout permanently, but couldn't find any entry in udev rules.

Where is the group of /dev/ttyAMA0 defined by udev ? Or any other system...