Ubuntu 21.04 на диске Asus Prime B250M-A NVME не загружается

Я только что установил карту nvme M2 (Samsung 980 1T PCIe 3.0) на свою материнскую плату ASUS Prime B250M-A с двумя слотами NVME M2, и мне удалось установить на нее Ubuntu. Это было видно во время установки.

Но материнская плата на нем не загружается. Мне нужно запустить биос и вручную выбрать диск Ubuntu в каком-то списке загрузки. Затем Ubuntu запустится, но запускается медленно из-за ошибок. Ubuntu загружается быстрее на моем старом диске SATA SSD.

The problem is solved. I left the old not working SATA SSD connected. Once I disconnected it, the computer worked as expected. There is apparently a problem with this old SATA disk that was confusing the BIOS.

The symptoms were strange. I could not enter the bios when pressing the del or F2 key. Forcing a boot on the nvme M2 card was slow. There was not POST or error feedback.

Once the old SSD was disconnected, I could enter the bios without problem and the PC would boot really fast.

So, if you encounter a similar problem, like failing to boot on nvme card, the first thing to try is to disconnect all other hard drives and leave only the nvme card. Once I did that, all problems were gone. I then reconnected the hard disks one by one until I found the one causing the problem and it was the old SSD.