skibum
Posts: 16
Joined: Fri Jan 27, 2017 1:45 pm

Black border on screen on an LG 43UD79-B

Thu Sep 19, 2019 8:17 pm

I've just connected my p4 to my LG 43UD79-B monitor

It has 4 hdmi: 2 are 30hz (1 & 2) and 2 are 60hz (3 & 4).

As I just intended to use it in 30hz mode I plugged it into hdmi 2.

The problem is that I have about a 1" black border going all around the screen. Which I don't get on my windows pcs or my other linux pc.

I've tried changing the all the monitor settings and tried all 4 ports and 4 different cables (inc the official cable).

I can get 60hz when I edit the config.txt file, but I still get this 1" boarder.

Pi4 :-
Image

windows :-

Image

anyone got any ideas?

the pi is up to date. It was running the 64bit kernel, but I swapped back to the 32bit one to see if that changed anything. It didn't.

skibum
Posts: 16
Joined: Fri Jan 27, 2017 1:45 pm

Re: Black border on screen on an LG 43UD79-B

Fri Sep 20, 2019 12:07 pm

Well I've found the issue. In wanting to try the official 64bit raspian it somehow messes up the video. Even if you're still in 32bit mode.

compuguy
Posts: 25
Joined: Thu Jan 24, 2013 5:26 am

Re: Black border on screen on an LG 43UD79-B

Tue Sep 24, 2019 3:20 pm

I had the exact same issue with a Dell monitor with the latest rpi-update kernel. I disabled overscan in the config.txt, and that resolved the issue for me.

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