The commands didn't show any positive result. What I did:
1. Pluged in the usb cable. As root I put: blacklist acm in /etc/modprobe.d/acm_driver.conf and /etc/modprobe.d/blacklist.conf
2. In terminal: modprobe pl2303 (It shows no error message)
3. I found new_id file in the directory: /sys/bus/usb-serial/drivers/pl2303/new_id
4. In terminal: echo 04cc 0000 > /sys/bus/usb-serial/drivers/pl2303/new_id
5. I checked the VID and PID is written in the new_id file. (Things gone right!)
6. In terminal:
bao@bao-desktop:~$ lsusb
Bus 001 Device 005: ID 1c4f:0026 SiGma Micro Keyboard
Bus 001 Device 004: ID 09da:c10a A4Tech Co., Ltd.
Bus 001 Device 007: ID 04cc:0000 ST-Ericsson
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub