Many users are disappointed with AMD's weak support for their Linux video drivers compared to Nvidia. Among the troubles that a user may face while using AMD drivers is the thick black border that shows up when establishing an HDMI connection:
In this tip, we will help you fix this problem under the following Ubuntu/Linux Mint distributions:
- Ubuntu 12.10/12.04/11.10 or older
- Linux Mint 14/13/12 or older
Open the AMD Catalyst Control center with root privileges and select the DTV tab, then in the right pane of the window, select the Adjustments tab:
In "Scaling Options", move the slider handle to the right until it reaches 0% (Overscan), then click Apply to save the new changes. The problem here is that the 'Scaling Options' value will be restored to default once you reboot your system, which will make you re-configure it again and again. To fix this, you need to run this command to make your AMD Catalyst Control center not to forget your monitor settings:
sudo aticonfig --set-pcs-val=MCIL,DigitalHDTVDefaultUnderscan,0
You can now enjoy full-screen for your HDMI connection without that annoying large black border.