Here is an analogy to explain the situation with the renderers: it disappears when you reboot or log out). That change applies only to the current boot cycle (ie. Notice the driver on the Display line has both drivers for the onboard graphics (radeon) and AMD (amdgpu).Ĭode: Select all DRI_PRIME=1 in a terminal. If your computer has AMD onboard graphics and a dedicated AMD/Radeon GPU, your graphics inxi section would normally look similar to the below:ĭevice-1: AMD Mullins vendor: Hewlett-Packard driver: radeon v: kernel bus ID: 00:01.0 chip ID: 1002:9851ĭevice-2: AMD Topaz XT vendor: Hewlett-Packard driver: amdgpu v: kernel bus-ID: 01:00.0 chip-ID: 1002:6900ĭisplay: x11 server: X.Org 1.20.13 driver: amdgpu,ati,radeon unloaded: fbdev,modesetting,vesa resolution: 1366x768~60Hz For newer AMD GPUs, the driver is amdgpu. Notice the driver on the Display line has both drivers for Intel (modesetting) and AMD (radeon). OpenGL: renderer: Mesa DRI Intel HD Graphics 3000 (SNB GT2) v: 3.3 Mesa 20.2.6 If your computer has Intel onboard graphics and a dedicated AMD/Radeon GPU, your graphics inxi section would normally look similar to the below:ĭevice-1: Intel 2nd Generation Core Processor Family Integrated Graphics driver: i915 v: kernelĭevice-2: Advanced Micro Devices Thames driver: radeon v: kernelĭisplay: x11 server: X.Org 1.20.9 driver: ati,modesetting,radeon unloaded: fbdev,vesa resolution: 1600x900~60Hz By using the onboard GPU as primary, your laptop will run cooler and the battery will usually last longer than if primarily rendering with the dedicated GPU. If the BIOS/UEFI setting is set to use both GPUs or there is no setting, the default setting for Linux Mint is to load the drivers and renderers for both GPUs, but the onboard GPU will be set as the primary renderer. How to tell which GPU is the primary renderer However, many laptops do not have this option. Some laptops have an option to change between using both GPUs (commonly referred to as "switchable" or "hybrid" mode) or just one GPU (either the GPU integrated with the CPU or the discrete GPU). The first place to check is your laptop's BIOS/UEFI to determine if there are options to set which GPU(s) are being used. Those laptops can use the nvidia-prime-applet for switching. It does not apply to laptops with switchable graphics which have an Nvidia GPU. Onboard AMD graphics and a dedicated AMD/Radeon GPU.Onboard Intel graphics and a dedicated AMD/Radeon GPU.While it shows that Intel is working to make its integrated graphics more useful and may foreshadow the multi-GPU support Intel plans for an all-Intel discrete plus integrated graphics set-up, it remains to be seen if Intel also plans to support other approaches, such as shared rendering and post-processing, that it found unsuitable for asymmetric set-ups.This tutorial applies to laptops which have: It also requires some programming for the game developers to support this model. This is not aimed at shared rendering, however, but works by splitting the compute tasks with the async ones going to the integrated graphics. Currently, the integrated graphics would be mostly idle during gaming. Intel’s GDC 2020 multi-adapter presentation seems narrower in scope but broader in adoption as it details how Intel’s integrated graphics could be leveraged using any discrete GPU to improve performance. We have previously reported on Intel adding multi-GPU support to its drivers in preparation for its discrete graphics, starting with DG1 this year. Intel has published the sample code on GitHub. Additionally, it's advantageous if the render doesn’t have to wait and if the compute is allowed to take more than one frame. Such tasks can also be offloaded completely. Intel found this approach to be the best because it follows a producer-consumer model, where the PCI bus is only crossed once: one adapter produces content that the other consumes. The third approach is to do “async compute” workloads, such AI, physics, mesh deformation, particle simulation and shadows, on the integrated graphics. One is to share rendering, such as alternating frames, but Intel said this is not suitable for asymmetric GPUs.Īnother is to do post-processing on the integrated graphics, but this requires crossing the PCIe bus twice. Intel also listed three possible uses for multi-adapter. The second approach is explicit multi-adapter with shared resources, which is what Intel did. Intel said this is typically symmetrical, which means that identical GPUs are used. Here, the set-up appears as one adapter (D3D device) with multiple nodes, and resources are copied between nodes. The first is Linked Display Adapter (LDA). Intel said there are two ways to accomplish multi-adapter in D3D12.
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