Core update 170: L2/L3 Cache error was detected on the RAID controller, MegaRAID 9341-4i

I had an issue after core update 170. I got this BIOS message:
L2/L3 Cache error was detected on the RAID controller. Please contact technical support to resolve this issue. Press 'X' to continue or else power off the system, replace the controller and reboot.

The RAID controller is a MegaRAID 9341-4i
Maybe someone gets the same error message. Here is my solution, by activating intel IOMMU function and set IOMMU to pass-through mode.

  1. boot the system with iommu kernel parameter: intel_iommu=on iommu=pt
  2. edit /etc/default/grub
  3. Add intel_iommu=on iommu=pt to this line:
    GRUB_CMDLINE_LINUX="panic10 intel_iommu=on iommu=pt"
  4. Save the setting and run command grub-mkconfig -o /boot/grub/grub.cfg to regenerate the config file.
  5. reboot

(Before I replaced the controller but this did not fixed it.)

more information from (german language)

Regards, Axel

1 Like

There seems to be something very broken in Kernel 5.15.59 regarding IOMMU.
However, core 171 with the updated kernel fixes this bug here, so there’s a good chance that also this IOMMU-related problem will be gone then.