I have an Asus Laptop with a hybrid GPU (Intel HD 520 & nvidia 940m). On a fresh install of Ubuntu 18.04 LTS, the iGPU performs as expected:
======================================================= glmark2 2014.03+git20150611.fa71af2d ======================================================= OpenGL Information GL_VENDOR: Intel Open Source Technology Center GL_RENDERER: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2) GL_VERSION: 3.0 Mesa 18.0.5 ======================================================= ... ======================================================= glmark2 Score: 1380 ======================================================= But the nvidia GPU performs poorly
======================================================= glmark2 2014.03+git20150611.fa71af2d ======================================================= OpenGL Information GL_VENDOR: nouveau GL_RENDERER: NV118 GL_VERSION: 3.0 Mesa 18.0.5 ======================================================= ... ======================================================= glmark2 Score: 292 ======================================================= Even worse performance with the proprietary driver:
======================================================= glmark2 2014.03+git20150611.fa71af2d ======================================================= OpenGL Information GL_VENDOR: NVIDIA Corporation GL_RENDERER: GeForce 940M/PCIe/SSE2 GL_VERSION: 4.6.0 NVIDIA 390.116 ======================================================= ... ======================================================= glmark2 Score: 165 ======================================================= The system runs fine if I use the iGPU but lags terribly with the nvidia gpu (firefox becomes a slideshow). Why is this happening?
