X280 Coreboot/Libreboot issues
Hello all!
Been having a lot of fun figuring out how to flash old laptops. Managed to libreboot my T480 and now trying to get my x280 going, the x280 has been more of a pain in the ass though. I've tried building from source via libreboot, and I've tried just building coreboot myself as well.
Immediately after flashing (both coreboot/grub2 and libreboot) it appears to work. It gets stuck trying to boot from the NVME drive, and then the screen starts to throw out nonsense/random characters/random colors (in the case of libreboot) and then goes black. When I try to restart, the power button and f1 button just flash on and off intermittently.
I did also flash the thunderbolt chip. I had confirmed that it didn't break anything when the stock BIOS was on the x280. I checked the version and it's on version 20+, the non broken version I'm pretty sure.
Has anyone seen this before?
Pastebin below of config + output during build:
I have a video of the intermittent flashing if anyone needs it.
I've tried going to the libreboot irc channel at different times but doesn't seem to get any response. Also, given that this is happening with coreboot as well, I'm not so sure it's limited to libreboot.
EDIT: Forgot to mention that I was able to briefly boot from a Mint bootable USB, but it had exhibited the same behavior of the screen going wacky soon after. I also forgot to mention that if I unplug the CMOS battery for some time, it's able to run Libreboot/GRUB for a few minutes before it crashes again.
EDIT 2: Forgot to mention I only see (memdisk) and (cbfsdisk) in GRUB. Even when I attach a USB drive.