Right alt works sporadically
I've had this problem for the last several versions of Ubuntu, but I'm now finally sick and tired of it enough to try to fix it. My right alt key works sometimes, but not always. If it doesn't work, only a restart and fix it. I would like to just stop this problem from happening altogether, and I've found a few solutions on Google, but they're only for older versions and refer to options that don't exist in Jaunty. Is there any way to get the right alt to always work?