Attempted install of ubuntu-22.04.4-desktop-amd64.iso gives error message '1.721856 nouveau unknown chipset'.
Attempted install of ubuntu-mate-22.04.4-desktop-amd64.iso gives same unknown chipset error message.
I've tried to install other distros to this system with similar errors to the above. Ubuntu 24.04 is the only one that seems to have recognized the new hardware and succeeded as it got all the way through to the end 'press restart' and then 'remove installation medium' and then found and started itself. And it seems to be present on the ssd but for some reason can't be found by the boot process.
Should I be concerned that boot-repair right up front reports 'nvram locked' whatever that is and how do I turn it off?
I really don't understand what's going on here.