Errors after fresh install

[mahesh]

Hello,

I'm a new to Unix and Ubuntu and not a geek, but a pensioner and sometimes a little slow on the uptake

I actually started out with using Debian but I failed miserably trying to setup RAID1, but thanks to the following guide I managed it with bravour

https://askubuntu.com/questions/1234...on-two-devices

Now I get the following errors when I check the system log.

     Code:

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sudo journalctl -b -p 3
Sep 15 14:07:45 macmini kernel: DMAR-IR: [Firmware Bug]: ioapic 2 has no mapping iommu, interrupt remapping will be disabled
Sep 15 14:07:45 macmini kernel: ACPI Error: Needed type [Reference], found [Integer] 000000003b3df95e (20210730/exresop-66)
Sep 15 14:07:45 macmini kernel: ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Store] (20210730/dswexec-431)
Sep 15 14:07:45 macmini kernel: ACPI Error: Aborting method \_PR.CPU0._PDC due to previous error (AE_AML_OPERAND_TYPE) (20210730/psparse-529)
Sep 15 14:07:45 macmini kernel: mtd device must be supplied (device name is empty)
Sep 15 14:07:46 macmini kernel: mtd device must be supplied (device name is empty)
Sep 15 14:07:46 macmini kernel: mtd device must be supplied (device name is empty)
Unfortunately I'm unsure if I can modify GRUB (GRUB_CMDLINE_LINUX_DEFAULT="") on the RAID1 as I did on Debian 11 with a non raid configuration and simply edit /etc/default/grub and then do update-grub.

Many thanks in advance for any hint and all have a nice day