maybe with all tv because that's how my Panasonic work also; I think that's the nature of optical out.
I have LG 42LH40 connected to a Bose Acoutimass system and a Directv HD DVR.
The LG does not have audio out RCA connection so I had to get an optical audio cable. I have HDMI from the DVR to the TV and optical audio from the TV to the Bose.
Problem: Directv remote will not control the volume or "mute" the optical audio output to the Bose system, requiring the use of the Bose remote to control the volume. I can see the volume bar moving on the TV, but it has no effect on the volume coming through the Bose.
Previously had a Sony TV (with RCA audio out), that when using the audio out to the Bose, had no issues with controling the volume with the Directv remote.
I am I just out of luck with this LG? I have only had the TV four days and I am getting ready to take it back if I am stuck with the multiple remote thing. Thanks for your feedback