CONFIG_X86_SYSFB: Mark VGA/VBE/EFI FB as generic system framebuffer

General informations

The Linux kernel configuration item CONFIG_X86_SYSFB:

• prompt: Mark VGA/VBE/EFI FB as generic system framebuffer
• type: bool
• depends on: (none)
• defined in arch/x86/Kconfig
• found in Linux kernels: 3.12–3.19, 4.0–4.20, 5.0–5.14

Help text

Firmwares often provide initial graphics framebuffers so the BIOS, bootloader or kernel can show basic video-output during boot for user-guidance and debugging. Historically, x86 used the VESA BIOS Extensions and EFI-framebuffers for this, which are mostly limited to x86. This option, if enabled, marks VGA/VBE/EFI framebuffers as generic framebuffers so the new generic system-framebuffer drivers can be used on x86. If the framebuffer is not compatible with the generic modes, it is advertised as fallback platform framebuffer so legacy drivers like efifb, vesafb and uvesafb can pick it up. If this option is not selected, all system framebuffers are always marked as fallback platform framebuffers as usual.

Note: Legacy fbdev drivers, including vesafb, efifb, uvesafb, will not be able to pick up generic system framebuffers if this option is selected. You are highly encouraged to enable simplefb as replacement if you select this option. simplefb can correctly deal with generic system framebuffers. But you should still keep vesafb and others enabled as fallback if a system framebuffer is incompatible with simplefb.

If unsure, say Y.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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