The nvidia gpu is installed fine, driver works. The problem is with your AMD gpu which is needed to work but is brand new (Ryzen 7 4800H)
Please install a 5.6 kernel:
You’ll need to download and install
kernel headers
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6.14/linux-headers-5.6.14-050614_5.6.14-050614.202005200733_all.deb
kernel image specific headers
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6.14/linux-headers-5.6.14-050614-generic_5.6.14-050614.202005200733_amd64.deb
kernel image
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6.14/linux-image-unsigned-5.6.14-050614-generic_5.6.14-050614.202005200733_amd64.deb
modules
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6.14/linux-modules-5.6.14-050614-generic_5.6.14-050614.202005200733_amd64.deb
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