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NVIDIA Releases Optimus Linux Driver With New Features
An anonymous reader writes "Nearly one year after Linux creator Linux Torvalds publicly bashed NVIDIA and several years after their multi-GPU mobile technology premiered, the graphics vendor has finally delivered an Optimus-supported Linux driver. NVIDIA released the 319.12 Beta Linux driver that brings support for 'RandR 1.4 GPU provider objects' that basically allows for Optimus-like functionality when using the latest X Server, Linux kernel, and XRandR. The 319.12 beta also has many other features including better UEFI support, installer improvements, new pages on their settings panel, and new GPU support."
As far as I can tell, this only adds support for using the nvidia card for everything (rendering the whole desktop) while sending its final framebuffer to the Intel for scanout. This is a strictly different use case from what bumblebee enables (rendering *specific apps* on the nvidia card while using the Intel for everything else).
Personally, since I only need the performance of the nvidia card one in a blue moon, the bumblebee approach is much more useful to me. Otherwise, I'd have to deal with tearing on everything (the current version of the nvidia RandR output provider does not support vsync) and increased power consumption.
I think what nvidia calls "render offload" in their README (which is currently not supported) is what would in fact replace bumblebee, if/when implemented. I'm curious as to how it would interact with power management, though. One of the very nice things about Bumblebee is that it doesn't even power up the nvidia card (via ACPI) until required, and that's easy because it starts up a background X server on demand to do the rendering. It's probably trickier to puil this off if you have to load the nvidia driver into your primary X server to take advantage of the direct integration.