USB serial adapter works once for each reboot...

I have a serial adapter USB to connect to the CONSOLE of the switch/router port and I use 'screen' inside the Terminal to connect. Recently, I found that the "screen /dev/cu.usbserial 9600" works only once for each restart of the system. Steps to reproduce:

1. the output of "ls/dev / * usb *" shows the right device.

2. connect to the console of the machine with 'screen /dev/cu.usbserial 9600 '.

3. press on "Ctrl + A, Ctrl + K" to exit the screen

4. (optional) disconnect/reconnect the usb to adapter series laptop OR disconnect/reconnect the cable to the device console target.

5. the output of "ls/dev / * usb *" shows again the device.

6. try to connect to the console with "screen /dev/cu.usbserial 9600", the process of the screen will hang. Once what is happening, the screen process cannot be killed by 'sudo kill-9' and only be solved by turning off the power full. BTW, the laptop will hang also when the start/stop, until I continue to press on the button / stop...

7. When hanging them screen, the output of "ls/dev / * usb *" would show nothing.

Once the notebook starts up again, I can connect with the same command screen and the same scenario for step 2-3 above...

I have Mac OS 10.11.3 and adapter Micro Innovations brand (prolific chip). I downloaded and installed/re-installed driver from the prolific site and no difference...

Any idea?

Still questions... help!

Tags: Notebooks

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