On Sun, Mar 8, 2020 at 6:56 PM Matt B matthewwbradley6@gmail.com wrote:
To those who have a dual-GPU G505s and have enabled the recent support for the dGPU, does DRI_PRIME GPU offloading work?
Yes, DRI_PRIME GPU offloading works on G505S - and actually I think it's the only possible way of using a discrete GPU on this coreboot'ed laptop at the moment. However, it's usefulness really depends on your software and how fast is the integrated GPU's RAM: you may have 1600MHz CL9 RAM modules installed, while a discrete GPU's own soldered chips are i.e. 1333MHz CL9 only. I recommend testing them side by side in all the programs you care about and remember which one is better in what cases.
Could here be an option created to enable/disable the dGPU at boot time without recompiling?
If there could be a real benefit from doing so (does it consume less power if you "hide it" from your system by disabling a PCI bus?), such a way could be implemented - however, I don't know how to do it without using NVRAM (which I would like to avoid for various reasons)