No SMBIOS - DMI not present or invalid

[covin]

Hello Gentoo Community!

For a couple of days I have been running into trouble getting my new system running. The short story: My kernel detects just one out of twelve cores and round about 1.8GB RAM of 32GB.

Here the hardware facts:
CPU - Intel XEON E5 2620 v3
Motherboard - SuperMicro X10SRL-F
RAM - 4x8 GB DDR4 ECC memory
Disk - NVMe Intel 750 Series SSD

Boot loaders tried: Grub2-2.02_beta2-r7 (EFI) and rEFInd-0.10.0
Current kernel: Hardened Gentoo 4.2.6 r6

My .config looks like [1]. It is minimal not my final config, since trial and error kernel compiling on a single core is time consuming

I've tracked down the problem to the first 'dmesg lines' [2]. It seems to me, that my system is unable to locate SMBIOS memory address(?)

[Logicien]

Hello,

the Linux kernel have several parameters you can use to help it to see the cpu number and the amount of memory correctly. You can pass to it the maxcpus=12 and mem=32G parameters and see if it resolv the problem.

One other thing you can do is to use a .config file from a working kernel version 4 as the base of your own one and do an

[covin]

Hi Paul,

actually I have already tried gentoo-sources with different versions. Every time the same result.

Well, I followed your suggestion to test other live meda. They worked mostly fine. The bottom line is, that I have examined their EFI/ESP setup, which shows some major difference to mine. My ESP is structured like this:

/EFI/grub/grubx64.efi
/EFI/refind/refind_x64.efi
/EFI/gentoo/<stub-kernel and initramfs> (for rEFInd)

whereas live meda had their *.efi file located at

/EFI/boot/bootx64.efi

So I copied my grubx64.efi to the location above. After reboot my board auto detected the ESP and the kernel booted with all cores and memory. (Previously I had to select the bootable efi file within BIOS manually, as advised in some blog post. It seems to me now, that this had bypassed and consequently disabled UEFI boot mode?!)

-- Solved, thanks! --