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Installing 21.04 on Gigabyte B560M DS3H with Intel Core i9 - Multiple problems

in flag
felix

I have a brand new machine comprising

  • Motherboard: Gigabyte B560M DS3H
  • Processor: Intel Core i9-11900 2.5GHz (Rocket Lake)

After quite some troubleshooting I have managed to install Ubuntu 21.04 on this machine but I still have some problems. Skip to the end for the unresolved questions.

In order to get Ubuntu installed and booting I had to take the following unusual steps:

  • To avoid power-off during boot I had to add kernel parameter: acpi=off. Without that parameter boot fails with message Failed to look up EFI memory descriptor for 0x.... If I use acpi=ht there is an abrupt hard reset during boot.
  • The Ubuntu installer failed at the setting up GRUB stage. I was able to manually install grub using the chroot method here except that a) I had to mount my boot partition at /target/boot/efi not /target/boot and b) I had to use the --no-nvram option of grub-install to avoid an Operation not permitted error.
  • To get the onboard graphics working above 1024x768 resolution I had to apt install linux-oem-20.04

Now I can boot the OS but I have two unsolved problems:

  1. According to /proc/cpuinfo the OS is only aware of one of my eight CPU cores.
  2. The machine cannot power itself off, I can only power off via a long press on the physical power button.

Does anyone have any idea how to diagnose or fix these problems?

Thanks for any help!

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Doug Smythies avatar
gn flag
Doug Smythies
Do you have a most recent BIOS for the motherboard? My experience is more with ASUS motherboards, but they typically need a BIOS update out of the box.
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in flag
felix
I now have the latest BIOS version. Boots fine with `acpi=off` but doesnt find all my cores. Without that it powers off part way through boot.
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Rimfire avatar
in flag
Rimfire
Have you installed firmware-linux-nonfree? I added non-free to the repositories and now acpi works too.
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cc flag
ubfan1
There are many acpi choices, try acpi=ht for instance. Google for the list, like in: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/kernel_administration_guide/listing_of_kernel_parameters_and_values
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