Hello

I have 3 GPUs in my AsrockRack system - Aspeed 2500 VGA (BMC), Intel iGPU i9 9900T and AMD WX4100 dGPU. All GPUs are accessible in /dev/dri

When I access the UNRAID GUI from my laptop, the temperature of the AMD GPU starts to creep up significantly suggesting that it is rendering the GUI.

When I close the GUI browser tab, the temperature starts to go down.

How does UNRAID decide which GPU to use in this case? I would prefer the i9 or aspeed to take over GUI rendering duties.

I am using the GPU statistics plugin so I am guessing that this is polling the wx4100 and keeping it active hence the temp creeping up.

Edited May 28, 20251 yr by mikeyosm

this is dictated by pcie lane and IRQ spots and bios options.

the GPU / BMC-Onboard graphics are dictated by the bios setting.

a G card in the top closets pce slot towards the processor can tell bios to overwrite the primary display and use the top slot.

Depending on Motherboard, this is all dictated before the grub boot menu and kernel loads...

some grub options existed in older kerneals ... unraid uses sylinx over grub soe I'm not aware of any adational driver / urnaid configuration that would set the primary dispaly...

-With out using the VFIO bind to pass the other Gcard to a VM. (can't guarantee other gcard would then be used as that is also dictated by the bios boot process)...

in other linux distors this is set by other configs adn gui software...

such as editing xrrand and xorg configs and driver setting on linux...

Unriad runs off slackware linus..

example of other distor

1. Kernel Parameters:

   • To set a specific GPU as the primary one, you can use the nomodeset parameter to disable kernel mode setting, which can sometimes help in selecting the GPU.

   • For NVIDIA GPUs, you can use the nvidia-drm.modeset=1 parameter to enable DRM modesetting.

   • For AMD GPUs, you can use the amdgpu.dpm=1 parameter to enable dynamic power management.

Additional Considerations

• BIOS/UEFI Settings:

  • Some systems allow you to set the primary GPU in the BIOS/UEFI settings. Check your motherboard's manual for instructions on how to do this.

• Xorg Configuration:

  • If you are using Xorg, you might need to configure the primary GPU in the Xorg configuration file (/etc/X11/xorg.conf). if booting unriad in gui mode.