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copied!<p>Actually, I had already tried the method suggested by @TevoD and running <strong>lsusb</strong> did show that the FTDI usb device was recognized within Virtualbox, however, I kept getting avrdude failure.</p> <p>Finally the solution was found in <a href="https://forums.virtualbox.org/viewtopic.php?f=3&t=50171" rel="nofollow">this post</a> at the Virtualbox forum. That did solve the problem, and I can now use Arduino IDE (or avrdude in general, from command-line), from within my Crunchbang 'Waldorf' guestVM (a Debain based super-light distro) -- running on Windows 7 Professional 64-bit host.</p> <p>Since that link might go away some day, or might get behind an authentication scheme, the key steps are:</p> <ol> <li><p>Change the COM port number of the FTDI USB-serial port, assigned by default. This is typically needed because Virtualbox has some issues dealing with COM port number in double-digits (e.g. COM11, COM23 etc. aren't liked, but COM1-COM9 is okay). To make this change, you need to ensure that the FTDI USB-serial device hasn't been claimed and attached to Virtualbox guestVM, i.e. perform the step with guestVM shutdown. Via Win7 Device-Manager > Ports > COMxy (where 'xy' is default port#), select 'Advanced Settings' and then change the COM port no. to be a free one between 1-9.</p></li> <li><p>Next, in the Virtualbox console, change the guestVM properties, and enable Serial Port settings, i.e. let the FTDI USB-serial converter be seen as a serial-port in the guestVM, not as a USB device. So internally the serial-port driver is used in Linux, not the usb-serial (FTDI driver). So if the COM port# is 2, we set the port as COM2, set mode to Host-Device, and the path/file to "COM2:" (don't forget the trailing colon, but of course, without the "" marks).</p></li> </ol> <p>Restart the VM and I also had to restart the host, and then you are good to go.</p> <p>However, if this method doesn't work -- it didn't work on my Netbook. This <a href="http://www.arvydas.co.uk/2011/02/forwarding-usb-devices-on-oracle-virtualbox/" rel="nofollow">alternative method described here</a> does work. Of course, it requires the proprietary USB 2.0 EHCI support delivered via the optional "Extension Pack" to be installed.</p>

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