Yes, this must be a driver issue, because I checked it today with a laptop which has an Intel GMA X4500 and there was no stuttering. In fact this makes the open source driver useless, because under Unity 2D theres no stuttering, but I got video tearing instead on both machines (bug 792315) and the ATI X200M is not supported by the proprietary driver (Catalyst), so I'm unable to watch videos properly on 12.04.
Yes, this must be a driver issue, because I checked it today with a laptop which has an Intel GMA X4500 and there was no stuttering. In fact this makes the open source driver useless, because under Unity 2D theres no stuttering, but I got video tearing instead on both machines (bug 792315) and the ATI X200M is not supported by the proprietary driver (Catalyst), so I'm unable to watch videos properly on 12.04.