2 GPU's Second GPU not out putting to my monitor

Operating Systems & Open Source Linux
1

Hello,

So I decided to switch back to Linux (Solus: Mate), as the game support has gotten a lot better. I have 2 GPU’s one is a GTX 580 ASUS 1.5GB GDDR5(main GPU), and the second is a GT 730 EVGA 1GB GDDR5. When I was on windows the Second GPU was working and outputting to my monitor but with Linux that seems to have not worked. Could anyone tell me if it is possible to output from a Second GPU, and if it is then how would I go about that?

Why I have the second GPU?
Well, it’s a bit of a story. I had a spare GPU the GT 730, and my main GPU the GTX 580 only has 1 HDMI, 2 DVI-I, and 1 Display Port. I did not have a DVI-I cable or a Display Port cable, but I did have an extra HDMI. So I grabbed my extra GPU and put it in my PC. So the problem was solved until I decided to use Linux, I thought Linux would have great support for multiple GPU’s, as Linux dominates the server industry.

None of my monitors support display port or DVI-I. I had an adapter DVI-I to VGA, but Linux will not output the correct resolution of my monitor, I tried manually adding the resolution with xrandr but just kept giving me errors. It’s a real shame, I think the only thing I can do is either buy another GPU or go back to Windows. I’ve searched all across the internet to see if there is a solution to this issue, I can find it.

I’ve also tried multiple different distros such as; Ubuntu 16.04.3, Antergos GNOME, Solus Mate, as I though it might be an issue within the distro but nope.

PC Specs;
CPU: FX 8150
RAM: 12GB DDR3 1600MHz
Sound Card: ASUS GDX
GPU 1: GTX 580 ASUS 1.5GB GDDR5
GPU 2: GT 730 EVGA 1GB GDDR5

Thanks
Steven

2

This is an issue with how Xserver is designed. This is impossible on Linux at the moment with any GPU. You may have better luck with new Wayland display server protocol if it supports this. (and it has to be 100% native Wayland, not XWayland) Fortunately, your GPUs are old enough to be supported by Nouveau, which you have to use to get Wayland properly working.

For now, if Wayland doesn’t work, get a MST splitter for your Displayport port and Displayport to HDMI adapters for your GTX 580. You may also have better luck with DVI-D to HDMI adapters.

3

Yea, I ended up switching back to Windows. I’ll be dual booting soon, and trying all of the options you have said, but I can seem me just buying a Display Port to HDMI adapter.

Do you know of any pure native Wayland Distro’s (Fedora?)?

Thanks for the response!!