Bios error during lcnc start

wrote:

I think the card needs to be installed during the installation.

That way, its kernel module will be loaded during boot-up.
 

You're wrong, so very very wrong.
 

Linux loads hardware modules at boot time, no matter if it was plugged in during install or not.
Proprietary modules/drives will nor be loaded during install nor after, they will have to be installed separately, like NVIDIA or AMD ROCM drivers.
Linux is extremely good with this as you can even add hardware while the PC is running, granted that hardware does not require BIOS initialization, and it will happily load required modules, like USB video grabbers, and in some cases SATA and PCI-E stuff like hard drives and NVME if set to "hot plug" in BIOS.
I recall having to reboot the windows PC to be able to use the USB stick you just inserted...ah the trauma!!!

The driver for the Mesa PCI\PCIe cards are loaded during the startup of Linuxcnc.

Linux has no issues loading kernel modules for supported hardware that are added after installation, if this was not the case live versions of Linux wouldn't work, installers for Linux would fall over.

If you have ever read the output of dmesg you would see very clearly that the kernel detects the installed hardware and loads the kernel modules as required, or the hardware may have support compiled into the kernel. With the caveat that the kernel "knows about the hardware". There is absolutely no need for the hardware to be present during installation. For hardware that is "hot swappable" the hardware is not required to be attached/inserted/present during boot, it is detected when inserted, and no this is not limited to just USB devices.
I'm quite astonished at the amount of information you post that is wrong. This is quite a distressing matter as one day someone will take your advice as true and have a very bad experience. You really need to reassess your level of knowledge and take some time out and sit back and learn.
When you are not being wrong you are not addressing the subject matter and being unhelpful.
As I've suggested before read a book and learn.

wrote:

That means if a PC running Linux happens to break, you can just take out the HDD and plug it into another PC and it will work no fuss, no muss.

Yes, for the last 20 odd years Linux could do that, even through external USB cases and/or CD/DVD rom's.
That is very hard to explain to "PC experts" who used windows only as that never worked, till win10 had that haphazardly implemented and intermittently working about 5% of the time.
"""ntldr not found"""

And you can build a Linux system entirely from source, if you are into that kind of shenanigans.
Boot from a tftp server and run the OS entirely from ram. Or boot from a tftp server and mount the rootfs from a third machine.
A lot of home routers/access points/modems run Linux.

Running a Linux desktop is quite boring and mundane when one realises what Linux is capable of, and what a user can do with it once they read & experiment.

BSD isn't forgotten, I've run it for years on a router/firewall.