I have exactly the same problem with a 2011 Samsung D7000 LED TV and a Panasonic Sound Bar:
I can also enter the menu on the Samsung TV -> System -> Anynet+ -> Receiver -> ON. This turns on the Panasonic Sound Bar, which is what I want it to do when the TV is switched on.
Unfortunately this setting is lost when the TV is switched off, which indicates to me that there is a software bug in the TV. Maybe if enough people complain Samsung will do something about it.
It will be interesting to know if anyone has similar problems with a Samsung Sound Bar.
I have recently purchased a 2011 Samsung D8000 LED TV, and I have set it up with my Denon AVR-1912 and a Samsung BD-player.
TV and receiver is connected through the TV's ARC with an HDMI 1.4 cable.
I have enabled HDMI CEC on all devices (including Anynet+ on the Samsung TV), and this works just fine.
Except for one thing, though: when I turn on my TV, the Denon receiver does not turn on. I can then enter the menu on the Samsung TV -> System -> Anynet+ -> Receiver -> ON
This turns on the receiver as it should on startup, but this setting is not permament, for some reason.When I turn off the TV, the receiver (and other devices) turn off as it is supposed to.
If I then turn on the receiver first, my TV remains turned off.
My old Bravia TV automatically turned on my receiver, as I turned on the TV, so the problem lies within the Samsung TV.
Are there any settings on my TV that I need to change?