G-Sync Compatible not working when multi GPU connected

Graphics / Linux Linux
#1

I am on Manjaro KDE / Using Xorg

My setup:

1 Monitor Gsync Compatible
1 3070 Ti - For Gaming - Connected to the monitor
2 3060 Ti - For Mining

If I connect only 1 GPU, G-Sync works perfectly without any configuration.
If I connect more than 1 GPU, G-Sync just does not work and the setting does not shows up on NVIDIA X Server Settings.

Is there a way to fix this?

#2

This is due to a limitation with X11 not the nvidia driver, hopefully on wayland nvidia will get vrr working. But it is not possible to have gsync or freesync working on X11

#3

Try this one, adjusting the busid to yours:
https://forums.developer.nvidia.com/t/failed-to-start-gdm3-after-installing-nvidia-515-driver-on-ubuntu-20-04/230170/2?u=generix

#4

Thanks for the suggestion. I made it work on openSUSE. But now I have another problem:
If I set only the main GPU, GSYNC works fine. But if I set the other two (to be able to set the Coolbits and OC) GSYNC stops working.
This is my current xorg.conf file:

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "AutoAddGPU" "false"
    Option         "AutoBindGPU" "false"
EndSection

Section "InputDevice"
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "InputDevice"
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "IMPS/2"
    Option         "Device" "/dev/input/mice"
    Option         "Emulate3Buttons" "yes"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BusID          "PCI:10:0:0"
    Option         "Coolbits" "31"
    Option         "ProbeAllGpus" "False"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BusID          "PCI:6:0:0"
    Option         "Coolbits" "31"
EndSection

Section "Device"
    Identifier     "Device2"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BusID          "PCI:7:0:0"
    Option         "Coolbits" "31"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection
#5

That won’t work.

#6

I tried this solution on Manjaro and it didn’t work. Looks like the problem is with Manjaro only.

#7

All good. At least GSYNC is working. But I wanted to make it work on Manjaro, cause is my favorite distro.