Hi,
the coreboot mailing list is a much better place for this, let's move it there.
On 27.01.2018 11:13, realraw@tuta.io wrote:
Followed the coreboot wiki entry perfectly, and had no issues reading the flash chip.
That wiki page seems to mention outdated .config settings. Generally I'd advice to start with a clean config (e.g. make distclean), only select your mainboard and leave everything else at the defaults. This won't give you maximum features but is most likely to show something on the screen ;)
The 4MB Bios chip in my x1 differs from the Wiki Entry:
Found Micron/Numonyx/ST flash chip "N25Q032..3E" (4096 kB, SPI) on linux_spi.
Not sure if that impacts anything, however booting I am faced with a Black Screen. Fan is not running at all, and appears nothing is happening.
If it's not about some misconfiguration or the VBIOS, another possible issue is that coreboot doesn't know your RAM configuration. The X1 has its RAM soldered to the mainboard instead of DIMMs. The latter would have SPD EEPROMs storing information about the RAM but with soldered- down RAM, that information has to be added to coreboot.
In mainboard_get_spd() (src/mainboard/lenovo/x1_carbon_gen1/romstage.c) there are two GPIOs checked. I'd first try to find out the state of these GPIOs and see if coreboot already knows that configuration. When you reflash your backup and boot with the vendor BIOS, please run `inteltool -g` (see util/inteltool/ in the coreboot tree) and attach the output.
I found this link as well: http://coreboot.coreboot.narkive.com/zUOsG1zN/lenovo-x1-carbon-3460-screen-s...
Flashed the rom at the end of the suggested mailing list comment, and still black screen.
I have included the vbios in my build, so I'm not sure what's wrong.
Many things can go wrong with a VBIOS. It's generally safer to use coreboot's native graphics init (or libgfxinit) for the first coreboot build because you can't (mis)configure anything.
Nico
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Nico Huber