I hope this helps you fellow HTPC enthusiasts!
ATI GUIDE FOR WINDOWS 7 HALF-FULL SCREEN PROBLEM
1. Turn off your HDMI-receiver/TV/projector
2. VNC to your HTPC (I use RealVNC)
3. Right click on desktop
4. Select "Screen resolution"
5. Click "Advanced settings"
6. Click "Monitor"-tab and then unselect option "Hide modes that this monitor cannot display". Then click OK and OK
7. Open Ati CCC by right clicking on desktop
8. In desktop properties page, choose 1280x720 resolution, click "Apply" and select "Yes" to the prompt that appears
9. Close Ati CCC
10. Open CCC again, choose 30hz interlaced, and now you can select 1920x1080 as the resolution.
Tested and works on Catalyst version 10.10e and 11.5
Note when you turn on your HDMI-receiver/TV/projector, Windows automatically changes to 1080p60 so don't worry about that 30hz interlaced I mentioned earlier)
Thanks goes to Chluz for this method (see this post)
ATI GUIDE FOR WINDOWS 7 HALF-FULL SCREEN PROBLEM
1. Turn off your HDMI-receiver/TV/projector
2. VNC to your HTPC (I use RealVNC)
3. Right click on desktop
4. Select "Screen resolution"
5. Click "Advanced settings"
6. Click "Monitor"-tab and then unselect option "Hide modes that this monitor cannot display". Then click OK and OK
7. Open Ati CCC by right clicking on desktop
8. In desktop properties page, choose 1280x720 resolution, click "Apply" and select "Yes" to the prompt that appears
9. Close Ati CCC
10. Open CCC again, choose 30hz interlaced, and now you can select 1920x1080 as the resolution.
Tested and works on Catalyst version 10.10e and 11.5
Note when you turn on your HDMI-receiver/TV/projector, Windows automatically changes to 1080p60 so don't worry about that 30hz interlaced I mentioned earlier)
Thanks goes to Chluz for this method (see this post)