Hello Dalao,
On 16.03.20 09:23, Dalao via coreboot wrote:
1, Run VGA Option ROMs+Legacy VGA text mode+VGA BIOS+SeaBIOS:
this combination is flawed. It will run the VGA BIOS twice, once in coreboot and once in SeaBIOS. Generally, this only works by chance.
T420: Everything works fine Can see SeaBIOS menu?: y Can see Linux/Windows bootloader? (the Manjaro's start screen and the Windows 10's spinning circle): y Can boot in Linux?: y Can boot in Windows?: y T440p: Can see SeaBIOS menu?: y Can see Linux/Windows bootloader?: n Can boot in Linux?: y Can boot in Windows?: n
2, libgfxinit+Legacy VGA text mode+SeaBIOS: T420: Can see SeaBIOS menu?: y Can see Linux/Windows bootloader?: y Can boot in Linux?: y Can boot in Windows?: n T440p: Can see SeaBIOS menu?: y Can see Linux/Windows bootloader?: n
This is very odd. The software interface is 100% the same as in the T420 case. Are you sure you are testing the same bootloaders? If you test on- disk installations, maybe the T420 was installed in BIOS and the T440p in UEFI mode?
Same applies to all combinations without the VGA BIOS blob. If it works on one machine but not the other, the difference is most likely in your software (bootloader, OS...).
Can boot in Linux?: y Can boot in Windows?: n
3, libgfxinit+Legacy VGA text mode+SeaBIOS:
Wasn't this 2?
For systems from the last 10 years, Windows only needs the VBT, AIUI. Make sure it's added to your coreboot image.
Nico