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Invalid joystick when I run ros in a virtual machine

asked 2014-05-14 09:37:57 -0500

pennpanda gravatar image


I'm trying to run my ros node inside a virtual machine domU on Xen.

I have pass the USB device to the virtual machine domU. In other words, inside the virtual machine domU, I can see the device /dev/input/js0.

However, when I launch the ros node which needs to access the joystick. It reports the error: Unknown joystick (2 axes, 3 buttons) Invalid joystick.

The joystick I'm using is joystick used for Xbox360. If I use lsusb command, it shows Xbox360 Controller.

I don't have this issue if I run my ros node on the physical machine.

My question is: How should I tackle this issue? The error suggest the emulated usb device seen by the virtual machine is incorrect. But how can I find out which part of the joystick device is incorrect? How should I narrow down the problem?

Thank you very much!

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answered 2014-05-14 20:42:33 -0500

Probably a special case, but maybe by random chance you experience the same issue: The USB dongle of the wireless mouse I use appears as a joystick device in Ubuntu and takes the /dev/input/js0 slot by default. If I connect a joystick, it automatically gets mapped to /dev/input/js1 by default. So you might want to check if you have multiple joystick devices on your system.

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Thank you very much, Stefan! Yes! That's the issue. After I change to js3, which is the Xbox360 joystick, I can use it now! :)

pennpanda gravatar image pennpanda  ( 2014-05-15 06:16:03 -0500 )edit

answered 2014-05-14 23:11:31 -0500

ROSkinect gravatar image

You may need to add permission to your usb port :

$> chmod o+rwx /dev/ttyUSB0
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Asked: 2014-05-14 09:37:57 -0500

Seen: 2,113 times

Last updated: May 14 '14