Problems with rendering on Ubuntu 18.04

I got recently some problems with the rendering in Matlab R2020a on Ubuntu 18.04. The following simple Matlab program

figure()
plot(1,1, 'o', 'MarkerSize',10,'LineWidth',10);
xlim([0.9,1.1]);
ylim([0.9,1.1]);

delivers the folowing plot:

Which, obviously looky ugly. I treid

opengl software

which solves the problem somewhat. But the OpenGL software just looks terrible, so i want to stay wit OpenGL hardware.

Can someone help me fix this?

Some informations on my current OpenGL version, used by Matlab...

>> opengl info
                          Version: '3.0 Mesa 19.2.8'
                           Vendor: 'Intel Open Source Technology Center'
                         Renderer: 'Mesa DRI Intel(R) Haswell Mobile '
                   MaxTextureSize: 16384
                           Visual: 'Visual 0x121, (RGBA 32 bits (8 8 8 8), Z depth 16 bits, Hardware acceleration, Double buffer, Antialias 8 samples)'
                         Software: 'false'
             HardwareSupportLevel: 'full'
        SupportsGraphicsSmoothing: 1
    SupportsDepthPeelTransparency: 1
       SupportsAlignVertexCenters: 1
                       Extensions: {250×1 cell}
               MaxFrameBufferSize: 16384

... and the informations from the system

$ glxinfo | grep -i opengl
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile 
OpenGL core profile version string: 4.5 (Core Profile) Mesa 19.2.8
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 19.2.8
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 19.2.8
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
OpenGL ES profile extensions:

[Moritz Feuerle]

Fixed it. The problem had nothing to do with Matlab, my NVIDIA driver was corrupted. Reinstalling the grapics card driver solved the problem for me.