Hi folks, using coreboot version : 4.21 I have an ADL-P DDR4 RVP and am using the Mrchromebox as a UEFI payload. *Method 1: * from the coreboot make menuconfig, under devices ->> Graphic Initialization -> Gop Driver Vbt ->> using the extracted Vbt file from the Stock BIOS
with the above config, It boots without problem on the uart console and I can enter the BIOS menu. However, I cannot get HDMI display output like backlight & logo. I inspected the debug log and it says "*Graphics hand-off block not found*"
*Method 2:* from the coreboot make menuconfig, under devices ->> Graphic Initialization -> none Vbt ->> using the extracted Vbt file from the Stock BIOS under payload->> IntelGopDriver.efi ( Got from the intel team)
with the above config, It boots without problem on the uart console and I can enter the BIOS menu. However, I cannot get HDMI display output like backlight & logo.
what should I do? what's the problem ? kindly please advise the solution of this issue.. Thanks in advance..
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mahesh