Hi Vikash,
If I remember correctly, those BIOSes have a binary CMS choice for CSM with regards to options ROMs. Either you permit legacy option ROMs or you permit UEFI option ROMs and there is not way to permit both at the same time. Make sure that these settings are configured correctly. Also make sure you have secure boot disabled. Cheers, Tom ________________________________ From: devel@edk2.groups.io <devel@edk2.groups.io> on behalf of vikash kumar <vickks....@gmail.com> Sent: 28 November 2019 06:54 To: Devel EDK2 Subject: [edk2-devel] [edk2-platform] UEFI Option Rom not loading on few motherboards Hi All, I am developing a UEFI Option Rom driver. I found that in few motherboard (ASrock X100 and above, motherboard with AMD processor and MSI PC) Option Rom is not loading. In this case, inbox driver is taking control of the device. I checked PCI trace and found Option Rom has read from Expansion Rom address but not started (Driver entry not called). I tried with updated BIOS also and found same behavior. Please help. Thanks and Regards, Vikash -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#51447): https://edk2.groups.io/g/devel/message/51447 Mute This Topic: https://groups.io/mt/64067323/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
