How do I fix overscan on my HDMI HDTV?

I've connected a HDTV with HDMI on my Radeon 4670, using the open source ati driver. However there is "overscan" which cuts off a bit of each edge of the screen, about the size of the gnome-panel. How can I fix this so it displays the full resolution?

Solution 1:

The issue was with the TV, not Ubuntu.

• Samsung TV - go to Menu / Picture / Picture Options / Size / Screen Fit (instead of 16:9).
• LG TV - go to Settings / Picture / Aspect Ratio / Just Scan (instead of 16:9)
• Sony TV - hit Home button, go to Settings / Screen / Display Area / Full Pixel
• Sharp TV - hit View Mode button, select "Dot by Dot" or "Full screen"

Solution 2:

As the above comments are saying, the problem is most likely due to the TV and not the driver.

However, if you have a Sharp Aquos TV, "Dot by Dot" mode might not be available in the menu as Pakman mentioned; I couldn't find an option for enabling "Dot by Dot" mode anywhere.

Instead, I solved the problem by discovering that my remote has a dedicated "Wide Mode" button for this setting, which looks kind of like this: |<>|. Press it to toggle from Stretch to Dot by Dot mode.

Solution 3:

Fixing HDMI overscan on a Samsung TV

I connect my laptop to the HDMI input of my Samsung TV. Due to overscan, The TV annoyingly puts part of the image outside the visible screen, even though the resolution is correctly set to 1080p. Here is a solution:

• Press Source on your remote
• Move down to your HDMI source and press Tools
• Select Edit name Scroll down to PC and select that one

Your screen goes blank for a second – and mission accomplished: the overscan is disabled.

Solution 4:

I'd suggest checking your graphics card driver software, I know ATI comes with overscan options. In windows there was a program called power strip that I used to fix this on mine with Windows 7.