When upgrading from CIMC firmware version 2.x to 3.0.1 on C220M4, it throws an error saying "Secure Boot Violation: Invalid Signature Detected". Is there any signed image for this version?

[sampathss]

When upgrading from CIMC firmware version 2.x to 3.0.1 on C220M4, it throws an error saying "Secure Boot Violation: Invalid Signature Detected". Is there any signed image for this version?

[Andreas Linde]

Are you using HUU to update the C220 according to the config guide instructions?

Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 2.0 - Cisco IMC Firmware …