Just found out that by adding the clearcpuid=514 kernel option, you can open Monster Hunter: World on systems with 3rd gen Ryzen (source). I tested and confirmed this. Hopefully this will be fixed with either a BIOS or kernel update in the future, so that we won't have to do this manually. Seems like UMIP (the feature this disables) is a security feature implemented by Intel. But I have no way of knowing if this simply is not needed by AMD processors, or if it is not implemented properly by them. So it may be unsafe to disable the feature, or even just to keep it as a temporary workaround (@DataDrake do you have any idea about this perchance?).
Just as an FYI to people who are wondering how to do that on Solus, check the "Appending kernel parameters to Solus boot" section here: https://getsol.us/articles/troubleshooting/boot-management/en/. Basically echo 'clearcpuid=514' | sudo tee /etc/kernel/cmdline. But again, just as a caution, this is at best a workaround, and it does disable a security measure which may or may not be required by AMD CPUs, even if it is introduced by Intel.
