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Re: LiveCD bootloader

From: Vladimir 'φ-coder/phcoder' Serbinenko
Subject: Re: LiveCD bootloader
Date: Thu, 09 Sep 2010 00:52:27 +0200
User-agent: Mozilla/5.0 (X11; U; Linux mips64; en-US; rv: Gecko/20100805 Icedove/3.0.6

On 09/09/10 00:47, Teresa e Junior wrote:
On Wed, 8 Sep 2010 14:54:25 +0930
Brendan Trotter<address@hidden>  wrote:


On Wed, Sep 8, 2010 at 2:39 PM, Brendan Trotter<address@hidden>
GRUB and Linux use "video mode numbers" to request a video mode.
These video mode numbers can be different for different video
cards. Early versions of VBE did define some standard mode numbers,
but these became obsolete in VBE version 2.0 (back in 1994).
Software written after 1994 shouldn't rely on these obsolete video
mode numbers. For example, if you're lucky mode 0x118 might be
1024*768 with 24-BPP, but nothing guarantees that anymore, and it
could easily be any other video mode. There's also no guarantee
that the the video card supports the video mode (e.g. a lot of
video cards only support 32-BPP video modes and don't support any
24-BPP video modes; and some only support 24-BPP video modes and
not 32-BPP video modes; and the same is true for 15-BPP vs. 16-BPP).
My apologies.

It seems GRUB2 has improved a lot, and doesn't rely on the obsolete
"standard video mode numbers" anymore. Except for problems caused by
video modes that are supported by the video card but not supported by
the monitor; it's mostly only a problem with Linux itself now.



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Thanks! We have to set 640x480 as default anyway...

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Vladimir 'φ-coder/phcoder' Serbinenko

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