Not sure if this is the right spot, but I think a DTV rep might have just told me a way to get rid of the non-HD cables nag screen. Pardon me if this is an already known solution, but it's new to me.
In the Settings/Display/TV Resolutions, uncheck every resolution except 1080P. 1080P needs to be the ONLY resolution checked.
Setting it up that way, I get HD on my HDMI output for my main TV, plus I also see output on the S-Video (what I have going to my PC-TV card in another room) and I no longer get the nag screen.
Also have Settings/Display/Video/Native set to Off.
Seems like it's working OK - and I don't see the nag screen anymore on my s-video connection.
This work for anyone else?
Thanks for the great tip, but it doesn't work on my composite output. I use the HDMI for my local HT receiver, send the component video to my patio HDTV via a 75' VGA cable and modulate the audio and video for distribution to 3 SD TVs around the house. Using the modulator, I can distribute any one of three sources to any remote SD TV, so the grandkids can be watching a DVD in the playroom while I watch a HD show in the family room for example. All my equipment is located in the family room and I wired the whole house for audio video and other material. I agree with the premise that this message should be optionally disabled for situations like mine where I recognize the difference between HDMI, component and composite and also know the difference between HD and SD material.
Someone in this thread said something like "you only get what you pay for." In my situation, functionality that I once had was diminished while prices are increasing. I object to this. I will not buy more stuff to duplicate what I had, but instead ask DTV to make the message a user option that is on by default, but can be disabled in the Setup->Preferences screen.