@Csaki My Friend's dual monitor system...

Welcome linuxer! What is weird about this.. Am i missing something...

@linuxxx if you connect your VGA to an external video card, the onboard card disables, and the external takes over. He/she should at lease use the DVI port on the external card and convert it to VGA

@binarydigit it's actually possible to have the onboard still enabled while using a discrete card... I'm doing this very thing myself. My card is connected to my primary monitor, onboard is connected to a side secondary.

Basically, this setup let's you dedicated your discrete card's resources to a solitary display wile your CPU's onboard circuits run the secondary instead of sitting unused.

@binarydigit Wow great explanation. Unfortunately I couldn't understood sry...

Nothing wrong with the picture just depends on the drivers and bios settings if they onboard and card gpu can be used at the same time.

@RevThwack interesting🤔

So.. It's not stupid, if it's working, right?

@binarydigit Never knew this. I have two video cards in my computer and the dual monitor setup has always worked so didn't know you could not do this :P

Older motherboards would behave that way, where if you had a discrete one, it turns off the onboard. Newer motherboards don't do that anymore, you can have multiple, and some even let you crossfire etc.

i have a pretty new motherboard (some ASRock from 2014) and it theoretically supports this kind of setup. i couldnt make it work sadly

It's not working... He has connected secondary monitor to DVI-D port with DVI to D-SUB adapter and working....

What if it's actually just the same cable?

@RevThwack I can confirm that, had the same thing going for years.