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http://lkml.iu.edu/hypermail/linux/kernel/0707.3/3138.html
GOP protocol, an EFI framebuffer driver is needed for displaying console messages. The patch adds a EFI framebuffer driver. The EFI frame buffer driver in this patch is based on the Intel Mac framebuffer driver. The ELILO bootloader takes care of passing the video information as appropriate for EFI firmware.
https://sourceforge.net/p/linux-fbdev/mailman/message/14206729/
This patch adds Graphics Output Protocol support to the kernel. UEFI2.0 spec deprecates Universal Graphics Adapter (UGA) protocol and only Graphics Output Protocol (GOP) is produced.
https://bkhome.org/news/201604/kernel-config-for-efi.html
Quirky has a long-standing bug, booting on UEFI-firmware PCs. If I boot with "loglevel=7", I am supposed to see heaps of output from the kernel on the screen at bootup. On BIOS systems, fine, but nothing displays on UEFI systems.
https://docs.slackware.com/howtos:slackware_admin:linux_kernel_options_for_uefi_and_elilo
EFI-based Framebuffer Support (CONFIG_FB_EFI [=y]) File systems. Miscellaneous filesystems. ... Note that some UEFI firmwares do NOT support the default boot location, so this will not work. However, if it does, you won't have to worry about the system not booting again. To do this you can boot into the Slackware install DVD, mount the ESP and ...
https://forums.gentoo.org/viewtopic-t-1079196-highlight-.html
Mar 31, 2018 · Everything else except "simple framebuffer support" is leading to no console at all. i have to enable this to see anything while booting, no matter if one of those is set: VESA VGA graphics support EFI-based Framebuffer Support Its seems like its all about simple framebuffer support to show me text while booting,
https://customlinux.blogspot.com/2013/02/uefi-on-gentoo-with-grub2.html
That forced the board to only boot of UEFI so I knew that the livecd wouldn't be booted in legacy/mbr mode. After you're booted off a uefi medium you can verify by looking for the directory `/sys/firmware/efi` . If it exists you should be good. If it doesn't then you either : A) Aren't booted right off the UEFI medium - check bios settings
https://github.com/pentoo/pentoo-historical/blob/master/wiki/UEFI.wiki
EFI-based Framebuffer Support (CONFIG_FB_EFI) Optional, but recommended* Boot failures are difficult to see too without *EFI-based Framebuffer Support*, so it helps to have it enabled. Download patched kernel. For quick tests a kernel is available for download at: …
https://crux.nu/Wiki/UEFI
Overview. UEFI (Unified Extensible Firmware Interface) is a replacement for the BIOS (Basic Input/Output System) used by most IBM-compatible PCs. Much more detail can be found on Wikipedia's UEFI Page or at the Unified Extensible Firmware Inteface Forum.. This document details how to boot CRUX using UEFI. Installation Support. CRUX 3.2 and later support native UEFI installation.
https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface
The Unified Extensible Firmware Interface (UEFI) is a specification that defines a software interface between an operating system and platform firmware.UEFI replaces the legacy Basic Input/Output System firmware interface originally present in all IBM PC-compatible personal computers, with most UEFI firmware implementations providing support for legacy BIOS services.
http://bkhome.org/news/201503/linux-kernel-3192-efi-enabled.html
[*] EFI-based framebuffer support [*] Simple frame buffer support Firmware drivers EFI support <*> EFI variable support via sysfs Filesystems Miscellaneous filesystems <M> EFI variable filesystem Kernel hacking [*] Early printk via the EFI frame buffer ...anyway, we shall see. The kernel source, with patches and build scripts, is here:
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