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Mario Limonciello (AMD) 309a4c2fa6 PCI/VGA: Don't assume the only VGA device on a system is `boot_vga` [ Upstream commit `fd390ff144` ] Some systems ship with multiple display class devices but not all of them are VGA devices. If the "only" VGA device on the system is not used for displaying the image on the screen marking it as `boot_vga` because nothing was found is totally wrong. This behavior actually leads to mistakes of the wrong device being advertised to userspace and then userspace can make incorrect decisions. As there is an accurate `boot_display` sysfs file stop lying about `boot_vga` by assuming if nothing is found it's the right device. Reported-by: Aaron Erhardt <aer@tuxedocomputers.com> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220712 Tested-by: Aaron Erhardt <aer@tuxedocomputers.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Fixes: `ad90860bd1` ("fbcon: Use screen info to find primary device") Tested-by: Luke D. Jones <luke@ljones.dev> Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patch.msgid.link/20260106044638.52906-1-superm1@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-01-17 16:35:26 +01:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.