When I bought this TV, and hooked up a PC to it through HDMI (whichever of the HDMI ports the instruction booklet said to use), I found that at the "recommended" screen resolution of 1024 X 768, everything is stretched out horizontally. I assumed that this is due to the rectangular pixel shape of this TV, versus on a traditional 1024 X 768 computer monitor.
If I want to look at webpages and have the photos be at the correct aspect ratio, I can use the "P.Size" button on the remote to select 4:3 mode instead of 16:9, but this puts up the vertical grey bars on the sides of the screen. If I want to watch a video file, I can either do the same thing, or run the set in 16:9 mode, and use the VLC video player's controls to select 4:3 aspect ratio for a 16:9 file, or 1:1 for a 4:3 file. This works, but it's a bit of a pain to have to do it each time I want to play a file.
In the hope of finding some way to have the computer display in full screen AND at the correct aspect ratio, I have tried both nVidia and ATi video cards and drivers. I've looked through the various settings available for these cards to try to find something that will compensate for the fact that the display's native resolution is 1024 X 768, but stretched out to 16:9, but have been unsuccessful. I concluded that this was just a limitation of this kind of TV.
However, I just recently got a PS3. I connected it via HDMI, accepted the default option that lets the PS3 select the best display setting to use, and it displays everything -- Blu-Ray movies, games, computer video and image files -- in full screen, and at the correct aspect ratio.
So now, I am again wondering if there isn't something I can do to get full screen, correct aspect ratio display from the computer. If the PS3 can figure it out, why can't the computer? Can anyone offer any suggestions?