I have a very strange problem. I’m using a Duemilanove to send serial data to a Ubuntu 10.04 system. I start Ubuntu, plug in the controller, open a console and type “screen /dev/ttyUSB0 9600” and everything is working as expected. I can see the data.
Then I shutdown the Ubuntu PC and switch the power of. The controller is still connected to the PC. I restart the PC and type “screen /dev/ttyUSB0 9600” again and it tells me that it can not open /dev/ttyUSB0. Disconnecting the controller and connecting it again and everything is working.
I have removed brltty, but this does not help.
So my question is: what is using/blocking /dev/ttyUSB0 if the device is attached during boot.
Thanks in advance