Hi everyone, i'm going straight to the problem.
I have a Prusa i2 with Pronterface (not important), with an arduino mega and ramps 1.4 .
It seems that everytime i turn off the computer and connect my electronics via usb, arduino doesn't respond.
An example.
Yesterday, i connected my ramps with arduino and everything to my laptop, but the mega didn't light up and the laptop didn't make the classic sound of device connected, nonetheless arduino ide didn't see the mega connected. I then disconnected everything from the Mega and connected only the Mega to the laptop, everything ok, then i connected ramps and my printer worked just fine.
For some reason it seems that everytime i have to unplug ramps and replug it to turn on the Mega.
Any ideas of the problem ? It's very annoying