dv6t SE graphics quirks

I've had my dv6t for a few months now and as I've been using it, I've encountered quite a few situations that give problems and/or cause me to have to shut down in order to make the computer work again. I use the switchable graphics (which is really nice) however, sometimes when I wake the laptop from sleep (after just unplugging it), the graphics will not switch automatically and cannot be switched until the computer is restarted. Other times after sleep, the entire computer freezes and must be manually powered off and rebooted to even function. Has anyone else had these or similar quirks with the switchable graphics? For me, I like the idea, but it's very unreliable.

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