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Need explaination about kernel vga=791 boot parameter
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colag
Tux's lil' helper
Tux's lil' helper


Joined: 26 Sep 2009
Posts: 100
Location: Dhaka, Bangladesh

PostPosted: Sun Oct 09, 2016 6:15 am    Post subject: Need explaination about kernel vga=791 boot parameter Reply with quote

Hi,

http://pierre.baudu.in/other/grub.vga.modes.html
Code:

kernel /boot/vmlinuz-2.6.18-6-686 root=/dev/sda7 ro vga=791

From that link, 16 bit color,(65K) , 1024x768, 791 . How is 791 calculated? How does 791 come? Can anyone please explain?

Any answer will be highly appreciate.
Thanks in advance
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eccerr0r
Watchman
Watchman


Joined: 01 Jul 2004
Posts: 7130
Location: almost Mile High in the USA

PostPosted: Sun Oct 09, 2016 6:35 am    Post subject: Reply with quote

They're related to the modes your VGA BIOS assigns to each video. Most likely this is VESA compatible VGA BIOS and were virtually arbitrarily chosen by VESA, other than it's 512 (0x200) plus the VESA mode number.

https://en.wikipedia.org/wiki/VESA_BIOS_Extensions
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