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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?

  • My score is glmark2 Score: 4301 with NVIDIA 430.34 on GTX 1080/PCIe/SSE2 but I am using i3 window manager with compton compositor. But indeed Your score seems low... – Michal Przybylowicz Jul 27 at 14:11
  • Have You tried the latest nvidia driver 435.21? – Michal Przybylowicz Sep 1 at 19:42

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