Ubuntu 22.04: Firmware Bug no firmware reserved region can cover this RMM

Question

I get these errors on booting.

Are these errors serious? How can I fix them?

Answer 1

Are these errors serious?

Not really. It means your BIOS is reporting things the kernel does not understand. Often ACPI related and probably no working hibernation/suspend. I used to have them too but my ssd is so quick I nowadays do not bother with hibernation/suspend anymore.

How can I fix them?

See the first line: contact your BIOS vendor for fixes. A BIOS update can fix this. The second option would be to report these against the kernel used if this has not happened already (probably is ;) ) and wait for a fix.

Answer 2

You can use a simple way:

sudo gedit /etc/default/grub

Then add this line in "grub" file:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash mce=off loglevel=3"

Save "grub" file and do:

sudo update-grub

And:

reboot

Answer 3

enter BIOS and disable Intel RST (turn it off or switch it to AHCI)

Answer 4

For those who encounter similar issues like "Ubuntu xx.xx: Firmware Bug no firmware reserved region can cover this RMM" (but the following messages may differ) after re-installing the Ubuntu, check if you've formatted the partition for root (/) during installation.

For some who are curious, if you've made dedicated partitions for some mount points like /home, you can keep the data for re-installation. Of course, it makes little sense that you keep the kernel. In my case, due to incompatible issue of a software, I have to downgrade from 22.04 to 20.04 but I forgot to format the partition for root (/).