In my case, these keys weren’t present so I moved on to option two. Right-click the key 0000, hit find and input 1920×1080 in the search box (or the resolution you need) and if 1080 is the resolution of your monitor the key DALR6 DFP1920x1080x0圆0 will be highlighted in blue which you should then double-click and change every entry to zero.Ĭarry out the same exercise on the 0001 key, close Regedit, adjust your resolution to 1080 and you should find that the underscan has now gone. Then select HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video and find the long key (out of three) with three sub keys 0000, 0001 and Video as per the diagram below. Making changes in the Windows Registry isn’t for the faint-hearted and before any changes are made it’s always advisable to make a Registry backup by running Regedit (as Administrator), clicking file>export, and selecting export range>all as per the diagrams below. ![]() But there are some methods available for fixing the problem and as usual, I happened upon the easiest route last of all. Neither does Catalyst Control Center open fully with the legacy drivers and shows a cut-down version with minimal options. It’s also worth pointing out that the underscan only occurs in Windows 10 from some apparent inability of the OS to recognise the correct model of GPU. When using an HDMI/DVI adapter cable this underscanning doesn’t occur (or D-SUB VGA for that matter) and it’s taken me a while to figure out how to solve the puzzle. ![]() That is to say, the desktop won’t fill the entire display and is underscanned by around 15%. My front desk computer in the shop has an Athlon 64 x 2 fitted with a Radeon HD 4550 graphics card, which today is considered a legacy GPU and although drivers are available for Windows 7 and 8, an HDMI connection to the monitor will cause an underscan.
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