I have a 1920x1080 display that has an Aspect Ration of 16:9. Yet when I attempt to change to a lower resolution of 1600x900, I get a stretched image with blackout bars top and bottom. This is in-game as well as at the desktop. It would seem to me that a resolution of 1600x900 would be a perfect match for a 16:9 display. What's up?
My graphic 'card' is the 7660D on board an A10 APU.
Btw, this doesn't happen on my other machine with an Nvidia discrete card.
I always keep the display at the native resolution. I only wanted to back off a bit in one game to gain a few more fps. I can go to other rez's such as 1360x768, 1366x768, 1280x720, etc. But not the one that is an actual 16x9 ratio: 1600x900.
1920 x 1080 is 16:9, 1280 x 720 is 16:9, 1600 x 900 is 16:9.
What you need to do is open CCC (catalyst control center) and then on the left select my digital flat panel (assuming you are using hdmi or dvi) then select properties.
Under properties you will have an Image Scaling option, Check it and then select "maintain aspect ratio" then apply. This also work with "Scale image to full panel size" under 12.11 beta.
Now, whenever you go to a different resolution, it should automatically attempt to fill the screen. Choosing any 16:9 resolution should take up the entire screen, other resolutions will be boxed but should still take up as much space as possible while maintaining the aspect ratio.
My CCC layout is apparently a bit different with the APU, but I found the appropriate settings and made the change. It appears to have solved the issue. Thank you for the instructive input. I will give it some tests and report back.