Comment 243 for bug 568611

I just discovered something really odd, by accident: tapping the middle "touch" button on the right of the laptop, the thing that looks like three lines with blobs on the end meeting at a point, dims the backlight as I want -- I can increase the brightness with Fn-F5. It's an odd key combination but it allows me to control the brightness. Hope that helps troubleshoot and as a workaround for others.