The announcement of the new main board said there is a mux allowing the dGPU module to directly drive the display. If I update to the new main board and keep my 1st gen GPU will this still work? Or does the mux only work with both of the new gpu modules? Or maybe even just the nvidia module? And where will we configure this? Will there be a bios update to configure this there like other mux equipped laptops? Super excited for the new stuff!!
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I’m excited too! My recollection from the original launch was that the MUX worked with the original main board and GPU already. I can’t remember where I heard this though, so please take it for what it is.
I looked into it when I got mine last year and I think I actually saw a thread here saying the best you can do with the original modules was GPU offloading where the dGPU had to send its buffers through the iGPU.
The MUX is already included in the 1st Gen.
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Haha wow I must have very unluckily come across a thread that mislead me then. Then when in the video yesterday he called out a mux switch on the new main board I heard that as confirmation the old one didn’t but the new one did 
. I’ll go looking and I’m sure I’ll find it in 10 seconds but curious if anyone has doc links on how to control the mux?
Ahh I rediscovered why I was confused. I initially came across this thread [RESPONDED] MUX switch toggle in BIOS? - #53 by Matt_Hartley last year and by the time I stopped following it the answer seemed to be “good luck getting the mux working on Linux” so over the year my brain turned that into “I don’t have a mux” as a coping mechanism I guess 
. But looking at it now there is an update to this article talking about how AMD brought support to the Linux kernel recently https://www.phoronix.com/news/AMD-SmartMux-Linux-6.17. So leaving this info for others who happen to find this thread
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