Serial converter - cat /dev/ttyUSB0 hangs on open

Posted by Alex on Super User See other posts from Super User or by Alex
Published on 2012-11-26T16:04:24Z Indexed on 2012/12/02 17:08 UTC
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linux

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ubuntu

I am using Ubuntu 11.04 and attached a Garmin data cable. The device gets recognized

[17718.502138] USB Serial support registered for pl2303
[17718.502181] pl2303 2-1:1.0: pl2303 converter detected
[17718.513416] usb 2-1: pl2303 converter now attached to ttyUSB0
[17718.513443] usbcore: registered new interface driver pl2303
[17718.513446] pl2303: Prolific PL2303 USB to serial adaptor driver

... but when I do a strace cat /dev/ttyUSB0 it hangs on the open part and does not continue any more>

open("/dev/ttyUSB0", O_RDONLY|O_LARGEFILEC

If I do the same on Ubuntu 12.04 it stops on fread(" ... ") which is okay, as there is currently no data comming in at this port.

I am not sure if it is just a different configuration of the system or an driver related problem. How can I track this down further? Unfortunately I can not update the old Ubuntu 11.04 system for different reasons at the moment.

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