aspect ratio problem can't see taskbar
 

I installed Linux Mint but I can't see the taskbar to open menus,firefox or anything. When I hover my mouse in the bottom right corner the date pops up, so I think everything is there but I just can't see or click on anything. The only icons on my desktop are the Home and computer icons and they are barely on the screen but still visible. I'm hoping there is a way to adjust the screen ratio to show the whole screen. Also on web pages the "close tab x" is off the screen and out of range for my mouse to click but I was able to drag the page down to get to it.
I was able to make the taskbar icons larger, now I can see the tops of the icons so I at least know they are there.

Hit ctrl+alt+t and type sudo xrandr and post back what it says.

This is usually down to the display device, rather than the graphics hardware/X-server. Is it a TV/monitor that you're connected to? Brand and model details might be helpful here. Once we know that, we can advise further.

FWIW, I know that for AMD graphics hardware and the proprietary driver, it is possible to configure (via amdccle) to take care of overscan/underscan issues.