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Serial PC port and USB to serial port conflict
Jean-Pierre Piantino
Posted 2012-12-16 06:48
I have a PC running openSUSE 12.2 x86_64. This PC has a serial port which is connected to an UPS.
All is OK. I have inserted an USB to serial converter for a Windows program (Freeze Framer) running
with crossover. When I launch this program, it functions correctly but the connexion between the PC
serial port and the UPS is broken.
I have made the following tests:

lsusb
Bus 002 Device 002: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187 Wireless Adapter
Bus 005 Device 002: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser
[b]Bus 006 Device 002: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub[/b]
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

dmesg | grep tty
[    0.000000] console [tty0] enabled
[    0.439109] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    0.459881] 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    0.480144] 0000:00:03.3: ttyS4 at I/O 0x3440 (irq = 17) is a 16550A
[    0.973020] tty tty16: hash matches
[b][  947.451288] usb 6-1: FTDI USB Serial Device converter now attached to ttyUSB0
[/b]

I have created a symbolic link with my program in crossover:
ln -s /dev/ttyUSB0 ~/.cxoffice/Freeze \Framer/dosdevices/com3

I have inserted me in the dialout group.

When I launch Freeze Framer, it runs but the connexion between the PC serial port and the UPS is broken.

Where is the conflict?
Thank you in advance for your answer.

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