Comment 112 for bug 39315

The xkbset method mentioned on the "janerob" website above works well for me. I wouldn't say it completely fixes the problem, but I've only seen it happen once in nearly two weeks. Thanks, Paul!

The good news is that xkbset is in the Ubuntu repositories, so it's a simple case of installing it, and creating the script mentioned in the website. This seemed a lot simpler (at least from an Ubuntu perspective) than trying accessx.