Intel's New OpenGL Driver Is Looking Really Great With The Upcoming Mesa 19.2

[pal666]

And here is the list of new features on iris (not supported by i965):

good job
better late than never

[jf33]

Kayden Thank you for your quick and informative answer!

[oibaf]

Do you plan to make iris the default now that 19.3 is branched?

[Kayden]

What about feature parity? Are there OpenGL extensions supported by the classic driver that do not yet run on the Gallium3D driver? I would like to see the new driver on mesamatrix.net.

Here is the list of extensions i965 supports but iris is missing:

• GL_ARB_gl_spirv & GL_ARB_spirv_extensions
  (newly landed, these will come to iris shortly)
• GL_MESA_framebuffer_flip_y
  (should be added, nobody working on it AFAIK)
• GL_3DFX_texture_compression_FXT1
  (neither AMD nor NVIDIA support this format, so while we could add it, I question its value...)
• GL_APPLE_object_purgeable

And here is the list of new features on iris (not supported by i965):

• OpenGL 4.5 compatibility profile
• GL_AMD_pinned_memory
• GL_ATI_fragment_shader (for Star Wars: Knights of the Old Republic in wine)

I haven't added it to features.txt because it's basically the same set.

[jf33]

What about feature parity? Are there OpenGL extensions supported by the classic driver that do not yet run on the Gallium3D driver? I would like to see the new driver on mesamatrix.net.

[grigi]

Yes, the reduced CPU consumption on e.g. a 15W processor would probably help some more?
I know that undervolting the CPU on my notebook gave me noticeably smoother performance in games, and better FPS too.
It seems that the CPU can use a LOT more power than the GPU on my i7-8650U so, the less the CPU has to do, the less the GPU gets downclocked too.
This system is very power constrained.

[caligula]

You better get rid of SDDM, running Xorg as root is not a good idea.

Xorg can run as non-root only with certain drivers. For example, I haven't managed to run rootless X with proprietary Nvidia drivers. They crash during X startup.

[timofonic]

Great! Can you do a Windows vs. Linux comparison as well?

Yes, please!

[Ross41]

I tried Mesa 19.1 with Iris and then SDDM didn't want to start anymore, I think I should try again now with Mesa 19.2.

+1

[aufkrawall]

I tried Mesa 19.1 with Iris and then SDDM didn't want to start anymore, I think I should try again now with Mesa 19.2.

You better get rid of SDDM, running Xorg as root is not a good idea.

I hope it will be possible to use Iris with VAAPI in mpv.