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Re: Grub2 almost does what I want

From: Felix Miata
Subject: Re: Grub2 almost does what I want
Date: Sat, 02 Feb 2013 16:04:18 -0500
User-agent: Mozilla/5.0 (X11; Linux i686; rv:18.0) Gecko/20100101 SeaMonkey/2.15

On 2013-02-02 23:50 (GMT+0400) Andrey Borzenkov composed:

If you have ideas how to improve generation of grub.cfg that are generic
enough, it is always possible to submit patch (or attract someone to
write patch to implement them :) )

1-Get rid of the vga= is deprecated message. It has nothing to do with Grub2 function. Some installations still require it, it's still a valid kernel cmdline option, and it still functions as always when KMS is not enabled.

2-This is the initial Mageia (3) Cauldron (grub-2.00-16.mga3; os-prober-1.57-3.mga3) grub.cfg file generated yesterday:

What an ugly mess. This installation was originally made Dec 6 with Grub Legacy on / partition. Generic DOS/BIOS compatible code is on MBR. Active master boot partition is sda3 using Grub Legacy, which has a stanza to load Cauldron's core.img that uses this grub.cfg file.

I later edited /etc/default/grub with this resulting content:
GRUB_CMDLINE_LINUX="ipv4only=1 noplymouth splash=verbose video=1152x864 vga=794 3 "

and regenerated grub.cfg with this similarly disappointing result:

Note the default stanza's vmlinuz-prv & initrd-prv, which are symlinks to the previously installed kernel. One set of the current kernel's symlinks are way down the list in the submenu, vmlinuz-cur & initrd-cur, while the default set, vmlinuz and initrd also pointing to the latest installed, are not present in any stanza, and other sets are in duplicate stanzas without even considering recovery stanzas.

How mkconfig decided what to create and where to locate are unfathomable. Consequently, I have no idea anything specific about how to improve it, only that it needs improvement, with one exception:


If true:
2:MBR installation.

If false:
1:assume GRUB_DISABLE_OS_PROBER=true (only provide stanzas for kernels on the installation target partition; override if not GRUB_DISABLE_OS_PROBER=true)
2:do not write to MBR track.

Linux installation programs could provide a checkbox so that the big mess and the suspiciously long installation delay on account of mkconfig/os-prober's sloth can be readily avoided from the outset.

Annotated partitioning of subject system:
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***

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