If 3.3.7 fixes it, could you also check that the kernel in precise-proposed fixes it? Enable it from the software-manager and update the package lists, then upgrade 'linux-generic' and reboot.
If 3.3.7 fixes it, could you also check that the kernel in precise-proposed fixes it? Enable it from the software-manager and update the package lists, then upgrade 'linux-generic' and reboot.