I am submitting this patch because we find it benificial in some environments. It explicitely turns off the LNB voltage for the stv0299 and alps_bsrv2 frontends. There are a couple of advantages to this feature. It allows the connection of multiple cards to one LNB without frying cards (if you don't have a switch). It also allows you to turn off the receiver card without shutting down the entire machine if you are changing cables (and trying to reduce the chances of shorting various devices).
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