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- Jun 2021
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en.wikipedia.org en.wikipedia.org
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The x86 "PC" version GNU GRUB 2 has a vbeinfo command for printing out available video modes and vbetest for trying a specific mode. They use a built-in table instead of Funcion 01h. For other platforms, including x86 EFI, they are replaced by the more generic videoinfo and videotest.
The commands vbeinfo and videoinfo can be used to print all supported resolutions. To exit vbetest or videotest in grub, need to send "ctrl+alt+delete" to go back to grub menu list.
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