I have scaling problems with Radeon HD6850 (HDMI) and Acer S222HQL (HDMI).
Before I switch to HDMI I had used DVI with a "crystal clear" image. Today I switch to HDMI and get a washy look. First the image filled only 90% of the screen then I found the "Underscan/Overscan" option within the Catalyst Control Center and have now 100% fully filled. BUT I get this washy look. A few lines are sharp and many are washy and some realy unsharp.
To get the 100% image I had moved the "Underscan/Overscan" option right to overscan.
I am no realy familar with graphic card settings. I thought that HDMI can communicate as well as DVI. So what is the problem with it? A very bad autoconfig happend…
- OS: Windows 7 Professional SP1 x64
- Graphic card: PowerColor PCS+ HD6850 1GB GDDR5
- Graphic driver: ATI Catalyst 12.1 (CCC: 2011.1205.2215.39827)
- Monitor: Acer S222HQL
- Monitor driver: Acer S222HQL HDMI ICM 06/16/2010,1.0
- Port: HDMI 1
Best Answer
I ran into the same issue when first setting up my own Acer H244HQ display over HDMI on my AMD Radeon HD 6970 cards.
The image over an HDMI connection can look as good as a DVI connection, with the right settings. I don't think AMD's CCC defaults to the optimum for monitors over HDMI though.
Keep the underscan/overscan settings as you had before, so the image fills 100% of the display.
Then, try looking at the Pixel Format settings associated with your HDMI display (I forget the actual location in the program where it is but it should be there). You should see a few options for formats: YCbCr, Partial RGB, and Full RGB. YCbCr is probably currently selected as the default. This is a color format typically used for movies, which is fine on a TV, but not good for a computer monitor. Change the setting to Full RGB and click Apply. The image should look much less "washed out" and a lot nicer.
EDIT
Another thing to try, if this doesn't fix the problem, is to adjust your Cleartype settings. Click the Start orb and type "Cleartype" and hit enter, and then follow the instructions in the wizard. This should help make your text much clearer to read.