Bug ID 33116505, 32456638
Issue: Oracle Server X5-2, Oracle Server X5-2L, Oracle Server X6-2, and Oracle Server X6-2L may encounter multiple issues as a result of downgrading system firmware in UEFI mode from SW 3.1.3 (Oracle ILOM 5.0.1 based) and later to prior versions.
See these issues in bugs reported:
32456638 - POST hang after ipmiflash downgrade from 5.0.1.27 to 5.0.1.21 with delaybios
32463224 - X5 Downgrade ILOM from SW3.1.3 to SW2.4 with Preserving BIOS Config, PCIe Devices are Not Initialized
32457643 - POST hang at "Microcode loading" after ipmiflash downgrade from 5.0.1.93 to 5.0.0.93.c with delaybios
Affected hardware: Oracle Server X5-2, Oracle Server X5-2L, Oracle Server X6-2, Oracle Server X6-2L
Affected software: SW 3.1.3 (Oracle ILOM 5.0.1 based)
Workaround: When downgrading from SW 3.1.3 to an earlier version in UEFI mode, use downgrade without preserving configuration option to avoid the above-mentioned issues.