I've been a Manjaro user for about half a year now on my desktop (Intel i7 4770 + Nvidia 750ti) and now the xfce desktop and Manjaro in general has become like heroin to me, it's literally the best thing ever. But I recently acquired a new laptop (ASUS ROG Zephyrus GA502DU, it has an AMD Ryzen 7 3750H CPU and an Nvidia 1660Ti Max Q GPU) to replace my dying desktop and immediately ran into technical difficulties installing Manjaro (and other distros). The live media boot of Manjaro (using free drivers) that I used at first opened to the desktop in my screen's max resolution, but everything I hovered my cursor over became pixelated and glitchy. I wish I'd taken photos becacuse I haven't been able to replicate this since. I tried with non-free drivers and it booted to a black screen, no blinking cursor, no response from Ctrl Alt F2, just dead. I redownloaded it on a different USB stick, tried it in different ports, and what I get now (using free drivers option) is a cursor showing up for about 3 seconds before the top part of the screen glitches like an old TV and then goes black and doesn't respond to anything. I just get the black screen with non-free.
Other distros I've attempted to install (MX, Mint, Solus, Pop!_OS) all had issues with the AMD/Nvidia hybrid GPU. The Nvidia driver recommended is 435, and only Pop!_OS was able to actually install that driver and apply it to the card, but even that wouldn't let me turn off the AMD integrated graphics processor so it ran super slow. I believe the problem has something to do with the 1660ti Max Q being quite new, and also the Ryzen 7 3750H being kind of a novelty that might not get any support for a while. Combined they make the perfect storm of making installing linux a right ballache.
The real kicker is the backlight on the keyboard though. It is borderline unusable without the backlight, and there's seemingly no option to set up ASUS's keyboard backlight in any linux distro, none of the normal commands work.
Is there any chance at all that I can get an AMD CPU with integrated graphics working alongside a dedicated Nvidia GPU on Manjaro?