Gee, what fun. There are lots of things that can go wrong, to get some idea, see the
display handling for HP Falco, in which we managed 4 different types of displays.

I'll try to take a look later, but just keep in mind that the displays are frequently not all the same

on different production runs of a laptop so something that works fine on one gives black

screen on another ...

ron

On Fri, Jul 3, 2015 at 7:35 AM <kroms@posteo.be> wrote:

Hello,

I allready contacted Francis from libreboot and he forwared me to this
list, because it seems to be an issue regarding coreboot.

I have flashed a Lenovo T400 with libreboot.

The T400 has an Intel GPU and I am able to use it with an external
display connected to the onboard vga-port.

The issue is, that I can't use the internal display, which is an
1440x900 Samusung LTN141WD-L05, EDID dump:

https://paste.debian.net/plainh/b3699c60

It seems like the internal screen is powered on while booting but it
stays black.

Francis assumes that this is due to bugs in how coreboot handles the
EDID.

Here is an EDID dump of a working display:

http://paste.debian.net/plainh/776705d5

Anyone is able to help?

Thanks in advance!

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