Patrik Tesarik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/33254 )
Change subject: mb/lenovo/t430: Fix Dual Graphics ......................................................................
Patch Set 1:
Patch Set 1:
did you also test the option to have only the internal or the nvidia gpu active?
I've tested the patched option in the different bios settings and describe the corresponding behavior in the following.
Integrated Only:
If no external VGA display is connected, payload (SeaBIOS) is displayed on internal screen.
If external VGA display is connected, internal screen is deactivated and payload (SeaBIOS) is displayed on the external display.
After successful kernel boot both displays are active. But internal display is distorted. Distortion may be results of competing graphics initialisation between Coreboot and SeaBIOS and will be tested in the next step.
Discrete Only:
In either scenario, external connection via mDP and internal display only, the output (payload stage up to kernel initialisation) is send to the internal display. But login is prompted on both, external and internal, displays with no distortion.
Dual graphics:
Same as Discrete Only.