Issue #476 has been updated by Bill XIE.
Related links updated
icon proposes [linux_trampoline: Handle coreboot framebuffer](https://review.coreboot.org/c/coreboot/+/76431) and [linux_trampoline: Handle 64-bit framebuffer addresses](https://review.coreboot.org/c/coreboot/+/76479).
---------------------------------------- Feature #476: Add option to convert coreboot-inited linear frame buffer to efifb directly https://ticket.coreboot.org/issues/476#change-1615
* Author: Bill XIE * Status: New * Priority: Normal * Category: coreboot common code * Target version: none * Start date: 2023-03-30 * Related links: https://review.coreboot.org/c/coreboot/+/76428 https://review.coreboot.org/c/coreboot/+/76431 https://review.coreboot.org/c/coreboot/+/76479 * Affected OS: GNU/Linux ---------------------------------------- Currently, the linear frame buffer that coreboot initializes should be handled by Linux kernel with dedicated driver "simplefb", but most installer of GNU/Linux distributions only enables "efifb" support, which causes a GNU/Linux installer kexec-ed from a Linux payload running atop simplefb unable to output graphics.
Currently, Grub payload could turn coreboot-initialized simplefb to efifb, which can be easily examined from the dmesg log of GNU/Linux booted from Grub payload running atop coreboot-inited linear frame buffer (simplefb). Chainloading a Linux payload with a minimal Grub payload only containing module "linux" and "cbfs" could make the Linux payload running atop efifb, of which GNU/Linux installers can make use, but the related code could be ported to coreboot to make things easier.