SLI In Manjaro Linux

Support Graphics & Display
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1

Hello everyone. I am attempting to get SLI/MultiGpu working on my PC using the arch wiki NVIDIA. But for some reason it claims it is not turned on even though I think it might be?

lspci | grep VGA

01:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1080] (rev a1)
02:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1080] (rev a1)

nvidia-xconfig --busid=PCI:1:0:0 --sli=Auto

Invalid SLI option: Auto.

nvidia-xconfig --sli=on
nvidia-xconfig --multigpu=on

Return the same error
Invalid SLI option: on.

nvidia-settings -q all | grep MultiGPU
nvidia-settings -q all | grep SLIMode

Return nothing.

Next I went in to xorg.conf and added “MultiGPU” “Auto” option “SLI” “Auto” under the monitor device. When I pulled up the nvidia settings the 2nd card changed it now showed Used Dedicated Memory and GPU utilization going from 0% to 1% occasionally. When the option is removed the GPU utilization and Used dedicated memory stays at 0MBs. I hope I am understanding this correctly.

Still a return of nothing for the above nividia-settings.

I well also note that both my monitors are plugged into the same GPU and function properly.

Is there a way to confirm its working? Did I do the steps wrong? I am really just looking for general suggestions or if I missed something. If any more information is needed please let me know.

2

Erm, what are you trying to accomplish here???

  • 2 video cards for 2 monitors?
  • 1 video card for 2 monitors and CUDA for the second card?
  • Something else entirely???

:thinking:

3

Sorry for the long wat for a reply.

I would like to achieve 1 video card for 2 monitors and CUDA for the second card.

4

:sunglasses: :+1:

What’s the output of:

inxi --admin --verbosity=7 --filter --no-host --width
mhwd --listinstalled

:thinking:

5

I’m guessing you don’t need all of this like USB’s so I trimmed it. But let me know if its missing something

A partial inxi is:

System:
 Kernel: 5.10.13-2-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.1 
 Desktop: Xfce 4.16.0 tk: Gtk 3.24.24 info: xfce4-panel wm: xfwm4 
 dm: LightDM 1.30.0 Distro: Manjaro Linux

Machine:
 Type: Desktop Mobo: ASUSTeK model: MAXIMUS IX FORMULA v: Rev 1.xx 
 serial: <filter> UEFI: American Megatrends v: 1301 date: 03/14/2018 

Graphics:
 Device-1: NVIDIA GP104 [GeForce GTX 1080] vendor: ASUSTeK driver: nvidia 
 v: 460.39 alternate: nouveau, nvidia_drm bus ID: 01:00.0 chip ID: 10de:1b80 
 class ID: 0300 
 Device-2: NVIDIA GP104 [GeForce GTX 1080] vendor: ASUSTeK driver: nvidia 
 v: 460.39 alternate: nouveau, nvidia_drm bus ID: 02:00.0 chip ID: 10de:1b80 
 class ID: 0300 
 Display: server: XOrg 1.20.10 driver: loaded: nvidia display ID: :0.0 
 screens: 1 
 Screen-1: 0 s-res: 3840x1080 s-dpi: 81 s-size: 1204x343mm (47.4x13.5") 
 s-diag: 1252mm (49.3") 
 Monitor-1: HDMI-0 res: 1920x1080 hz: 60 dpi: 82 size: 598x336mm (23.5x13.2") 
 diag: 686mm (27") 
 Monitor-2: HDMI-1 res: 1920x1080 hz: 60 dpi: 82 size: 598x336mm (23.5x13.2") 
 diag: 686mm (27") 
 OpenGL: renderer: GeForce GTX 1080/PCIe/SSE2 v: 4.6.0 NVIDIA 460.39 
 direct render: Yes

The mhwd --listinstalled output is:

 Installed PCI configs:
--------------------------------------------------------------------------------
                 NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
        video-nvidia            2020.11.30               false            PCI
6

That’s good.

What are the contents of:

/etc/X11/xorg.conf.d/00-nvidia.conf
/etc/X11/xorg.conf.d/90-mhwd.conf

:question: