When used with a Samsung DVD or HT, the TV does not switch on automatically with the source device, but it does come on if a DVD Play command is issued.
Normally, the TV must enter the Anynet+ menu to power on the DVD/HT. It's possible your receiver is smart enough to detect when the TV is powered on. Maybe it can be programmed to send a "TV on" command as well.
I would like to have my Samsung tv switch on when the processor powers on. I would like to use anynet+ (hdmi-cec) for that, but have sofar not being able to make this work. The processor is a PR-SC5507. hdmi-cec is enable on both systems. Also of interest to note is that I can get it to work the other way around. Processor switches on when tv is switched on. I'm having the TV's HDMI1 connected to the main out of the processor.