What happened to udev in Ubuntu 12.04?

Question

linux

There is a piece of hardware based on the FTDI chip (essentially a USB to UART adapter), when turned on, it is written as /dev/ttyUSB0. After updating the system from under a normal user, access disappeared, it works only under root (and not even through sudo, you need a clean root).
I think it's not a problem, I create a file with rules in /etc/udev/rules.d:

SUBSYSTEM=="usb", ATTR{idProduct}=="6001", ATTR{idVendor}=="0403", MODE:="0666", NAME="ttyUSBx"

After reloading the rules and connecting the device, /dev/ttyUSBx appears in the system, but any attempt to write to it results in an error:

[email protected]:~$ ls -l /dev/ttyU*
crw-rw---- 1 root dialout 188,   0 окт.  17 20:54 /dev/ttyUSB0
crw-rw-rw- 1 root root    189, 897 окт.  17 20:54 /dev/ttyUSBx

[email protected]:~$ echo 1 > /dev/ttyUSBx
bash: echo: ошибка записи: Недопустимый аргумент

And why is the old device hanging? (by the way, it is also available from under the root) Did you write down the rule incorrectly? In fact, I just need to change the rights. If you leave the old name, it still does not work ...

Answer 1

Have you just NAME="ttyUSB%n"not tried it?
Well, or add yourself to the dialout group.
And in such cases, it is worth bringing the tail from dmesg

Answer 2

Did you restart or
sudo restart udev ?
or try like this:
SUBSYSTEM=="usb", SYSFS{idVendor}=="6001", SYSFS{idProduct}=="0c9f", GROUP="adm", MODE="0666"