[ashxbmc]

https://www.mesa3d.org/envvars.html <- force GL 2.1 if you think this is the problem.

Tryed, dosn't help. 
 

Yes. The old way which worked much better (sadly) was removed as it was against the standard. The new way of doing things seems to cause issues. With some drivers it works better with others it's quite bad :-(

Well, I compare debug log of 14.04 - Kodi17.6 and 16.04 - Kodi18.0 and yes - the things are different. I see: 

Code:

 ERROR: CYUVShaderGLSL::CYUVShaderGLSL - failed to open file gl_shader_frag_texture_lim.glsl
NOTICE: GL: No pixel shader, fixed pipeline in use 

In new version. 
Even on very old Intel machine with

Code:

GL_RENDERER = Mesa DRI Intel(R) Q45/Q43
GL_VERSION = 2.1 Mesa 18.0.5

I don't see "No pixel shader". BayFail )) And C-state bug still here, - I have to switch to C1 max C-state in BIOS.
It's time to change hardware, it seems.  fritsch, did you have any troubles with Vsync on Apollo Lake?