It’s long bugged me that I was not able to use the extra mouse buttons (e.g. back) in my Linux VMs under VMware Workstation. Apparently it’s bugged a lot of others too because today after finally reaching my breaking point I did a quick search and found that manually adding a single line to your VM’s .vmx file will enable this missing functionality. Here’s the line, simply append it to your vmx file when your VM is powered down and restart:
mouse.vusb.enable = "TRUE"
I wish I’d hit my breaking point long ago and fixed this… Now my Kensington Expert Mouse is a first class Linux citizen in VMware.
Source of solution: http://goo.gl/zCYj6