Question Border around screen when switching from DVI to HDMI

[galandar]

I have an older ASUS computer (Windows 7) that I was running with an ASUS monitor. Originally, I was using the DVI port from the computer to the DVI port on the monitor. It worked fine. I never tried using the HDMI ports, even though both the computer and monitor both have DVI and HDMI ports. Recently I wanted to hook up a KVM switch but the switch only has HDMI inputs/output, so I tried using the HDMI port from the computer to the to the monitor. It displayed fine, except there was maybe a 1/2-inch black border all around the display. The DVI display had no such border. I thought maybe the KVM was causing the problem, so I hooked up the computer directly to the monitor using the HDMI ports. Same thing, a 1/2-inch black border. I looked at my display settings and they are set at 1920 x 1080, just like the DVI setup was. My questions are:

1. What information do I need to gather and post here to get help on this.
2. What steps should I take to resolve the problem? As I said, I checked the display settings. I also looked in the bios settings on the computer itself, and couldn't seem to find any help there. I looked at the monitor menu, but didn't find any help there either. I tried updating the PnP driver for the monitor, but that didn't help.

Any suggestions would be appreciated!

 

[helpstar]

which GPU are you using?
update the graphics card drivers

 

[Glenwing]

Many TVs will overscan an image (zoom in) by 5% or so, cutting off the taskbar and other edges of the display. It used to be on AMD graphics cards if you were connected to a display with 1920 × 1080 resolution, CTA-861 timing (TV standard), and using HDMI, the AMD driver would assume it was a TV and "underscan" the image (zoom out) by the same amount to "cancel out" the overscan that the TV would do.

But since many monitors today have HDMI, and will use CTA timing at 1080p for maximum compatibility, it will also trigger on monitors (which do not overscan) which results in a black border. You would need to go into the AMD graphics control panel and disable underscan.

 

[galandar]

I will try both of those. Thanks much for the help!