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[Software] What 'video' device is linux kernel using during initial boot?

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Schorschi
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Joined: 2013-10-22 01:52

[Software] What 'video' device is linux kernel using during initial boot?

#1 Post by Schorschi »

What 'video' device is linux kernel using during initial boot? GRUB you can find it via 'videoinfo' command. Once UI is up, say GNOME, you can use 'xrandr -q' for example, which on Debian 12 is XWAYLAND0. But if you are trying to force the kernel via an explicit 'video' kernel parameter, you need to know how the kernel sees the video subsystem. For example, video=VGA-1:1920x1080@60, but it is not always VGA-1. How to find what driver the kernel is using to complete the 'video' kernel argument configuration?
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NorthEast
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Re: [Software] What 'video' device is linux kernel using during initial boot?

#2 Post by NorthEast »

Some info here: https://www.kernel.org/doc/Documentation/fb/modedb.rst
Perhaps run:

Code: Select all

dmesg | fb
to see which drivers, if any, have been loaded that support modedb.
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