this post was submitted on 22 Mar 2024
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I want to buy used laptop with rx6600m and r7 5800h
Does switch between discrete gpu and apu work on linux for amd gpus?
Maybe there are some pitfalls?

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[–] just_another_person@lemmy.world 11 points 9 months ago (15 children)

Linux does not do GPU switching the same way Windows does, if that's what you're asking. You won't be able to just dynamically switch between video adapters.

As far as the quality of the AMD APU chips, totally fine. They are the best on the market, obviously. I have a Ryzen 7000 series with a 680M, and it "just works", as well as playing every title I've ever thrown at it totally smoothly.

[–] onlinepersona@programming.dev 3 points 9 months ago (3 children)

Hmm... are you sure about that?

$ DRI_PRIME=1 glxinfo | grep "OpenGL renderer"
OpenGL renderer string: Gallium 0.4 on AMD TURKS

DRI_PRIME=1 switches to the discrete GPU (or used to at least - I don't have hybrid graphics anymore). I'd be surprised if that feature were removed...

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[–] jrgd@lemm.ee 4 points 9 months ago (2 children)

This is render offloading, not GPU switching. GPU switching implies switching the primary rendering device (the one power the displays) entirely rather than rendering on a separate GPU and copying the output to the primary.

[–] CalcProgrammer1@lemmy.ml 7 points 9 months ago

Most gaming laptops these days don't support true GPU switching as it requires a hardware mux to switch the display between the GPUs. Every gaming laptop I've used from the past decade has been muxless and only used render offloading.

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