amd-catalystgraphics cardhdmioverscan
I have a dual-boot Windows 7 64 bit/Linux 64 bit machine that uses ATI's Catalyst drivers. Sometimes I attach it to a 1080p LCD TV over HDMI. ATI is daft enough to provide a border to account for overscan.
I'm using an LCD TV. No overscan, or it looks like crap because the pixel mapping is not 1:1. How do I disable this driver "feature" in Windows? in Linux?
Edit: since quite a lot has changed in the drivers (version 2011.0419 as of this writing) since I initially wrote this post, I decided to update it. The procedure is now drastically simplified:
Initial post: the inability to change underscan/overscan for the TV was actually an issue in Catalyst Control Center, version 9.9. The release notes for the latest version (9.10 from 22.10.2009) state:
Underscan/Overscan settings for TV can now be applied from the Catalyst Control Center - TV Properties Adjustments page
I made a short tutorial in case others are interested in changing this setting. To adjust Underscan/Overscan in Catalyst Control Center (version 9):
right click on the Desktop and choose Catalyst(TM) Control Center
from the upper left side corner, left click and choose Desktops & Displays
find the display you want to configure and right click on its icon from the lower part of the window and choose Configure
go to the Scaling Options tab and adjust the slider as you see fit (for me it's 0%, so the image can fit the entire TV screen) and click Apply
I have the same problem, this trick works for me on an Intel HD 3000 with a cheap 720p Akira TV:
xrandr --output HDMI1 --set audio force-dvi --mode 1280x720
Best Answer
I'm not 100% sure what the problem is, but if you're connecting over HMDI, then you're probably going to have overscan issues as the TV cannot give its EDID over HDMI. You will have to manually compendate for overscan in the catalyst control center overscan section. I'm assuming you know about the overscan slider in the ATI CCC?
If your problem is that when you have that slider adjusted so that the boarder doesn't display and it still looks like garbage then I'm not sure what your problem is as pixels should still be 1:1 if you have the resolution set right. 1080p is 1920x1080.
Are you using the latest drivers if all of these are above are correct?