Comment 34 for bug 974830

Andy: could you test something simple.. to disable FBC you can give an option to the kernel 'i915.i915_enable_fbc=0' by editing the kernel options from the boot menu. So if could test with that when booting the -25 kernel it would be great.

There is a commit in upstream v3.2 stable queue disabling that, and it's a oneliner change that _should_ be possible to get in the next kernel upload.. here's hoping.