Problem with Connecting USB Devices in Linux Primary OS

If you receive the "Unable to connect USB device" message while trying to connect an USB device to your Virtual Machine on a computer running Linux primary OS, the most probable cause is that you do not have permissions to access USB devices. To fix the problem:

1. Check if an usb-operating group exists in your Linux primary OS.
2. If the group exists:
   • In the Terminal, issue the command

     su

     to gain root privileges. Enter the password to the root account when you are asked for it.

   • Include into this group users who have to have an access to USB devices.
   • Run the

     exit

     command to leave the root account.

   • Proceed to step 4.
3. If the group does not exist:
   • In the Terminal, issue the command

     su

     to gain root privileges.

   • Create a group and include into it users who have to have an access to USB devices.
   • In the /etc/fstab file edit the string that mounts the usbfs. Devgid parameter should contain the identifier of the group created in the previous step.

     usbfs /proc/bus/usb usbfs devgid=<USB gid>,devmode=0664 0 0

     This option will of course only work if you have the relevant support compiled in your kernel.

   • Run the

     exit

     command to leave the root account.

4. Restart your Linux primary OS.