Check and search for dmesg errors first. Check linux-hardware.org for scans of the same machine. Look for any that are using other kernels that may have had better success. Run your own scan and upload it too so others can see.
The whole debian/Ubuntu primary use is for LTS kernel stuff. So you might be on an older kernel. All GPU stuff is kinda edgy for what the preconfigured options are set to by default. All distros have a purpose and what they are good at. The best documentation for custom kernel configurations comes from Gentoo in my opinion.
Check and search for dmesg errors first. Check linux-hardware.org for scans of the same machine. Look for any that are using other kernels that may have had better success. Run your own scan and upload it too so others can see.
The whole debian/Ubuntu primary use is for LTS kernel stuff. So you might be on an older kernel. All GPU stuff is kinda edgy for what the preconfigured options are set to by default. All distros have a purpose and what they are good at. The best documentation for custom kernel configurations comes from Gentoo in my opinion.