[dogma1138]

Because of MESA, also nvidia tried to make Optimus work on Linux when it supported it couldn't.

Intel doesn't supports GPU switching on its MESA drivers it requires the proprietary one.

Get the prop nvidia and intel drivers and get nvidia prime and you are golden.

Same issue with AMD GPUs with intel CPUs especially the PowerXpress ones.

[vetinari]

Intel doesn't have a proprietary driver for GPUs for Linux.

They do have a binary firmware, for Broxton and newer, however that's a thing that runs on the GPU. It does not have anything with how Mesa or other OpenGL stack shares buffers and video output devices.

[dogma1138]

Sorry that's what I mean, in Ubuntu it's under the display driver, they call it microcode.