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<H1>[Mageia-dev] Grub2 vs. Grub Legacy in M3</H1>
<B>Felix Miata</B>
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TITLE="[Mageia-dev] Grub2 vs. Grub Legacy in M3">mrmazda at earthlink.net
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<I>Sat Feb 2 06:48:43 CET 2013</I>
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<PRE>On 2013-01-28 19:27 (GMT) Barry Jackson composed:
><i> Grub2 can install it's kernel in the root filesystem which can be booted
</I>><i> directly. Installing the grub2 package, whether during install or later
</I>><i> automatically builds /boot/grub/i386-pc/core.img and also creates a
</I>><i> grub.cfg ready for use.
</I>><i> Chanloading is un-necessary since an entry in menu.lst on a legacy
</I>><i> system will boot a grub2 Mageia system using:
</I>
><i> title Mageia via GRUB 2
</I>><i> root (hdx,y)
</I>><i> kernel /boot/grub2/i386-pc/core.img
</I>
><i> ...as explained in the above README.Mageia
</I>
>><i> If you do it this way, you can install whatever you want as a bootloader
</I>>><i> on the MBR, and each partition can have whatever BIOS-compliant
</I>>><i> bootloader it wants, including grub, grub2, lilo, OS/2, DOS, or Wndows.
</I>
><i> Yes, I use a small grub2 partition sda1 as "master".
</I>><i> To boot into Mageia grub2 systems I use the grub2 multiboot command:
</I>
><i> menuentry 'Mageia-3 multi sda6' {
</I>><i> search --no-floppy --label --set=root mageia-3
</I>><i> multiboot /boot/grub2/i386-pc/core.img
</I>><i> }
</I>
This thread made it register in my brain for the first time that Grub2 can be
installed on the same / as Grub Legacy without interfering with it. So, on
one of my two Cauldron systems configured to my whim with Grub Legacy, I did:
# urpmi grub2
Which tried to intstall
grub2
os-prober
mageia-theme-default
mageia-theme-common
plymouth-plugin-label
plymouth-plugin-script
plymouth-system-theme
Proceed...? N
# urpmi --no-suggests grub2
which installed only grub2 and os-prober, and took several minutes to
complete (which the known lethargic os-prober is obviously responsible for).
I added a stanza to my master bootloader to load /boot/grub2/i386-pc/core.img
and rebooted, selecting the /boot/grub2/i386-pc/core.img stanza. Results:
Good start:
1-/boot/grub2/i386-pc/core.img in a Grub Legacy stanza succeeds
Not good from then on:
1-Grub2 error message due to not finding some png file
2-25 item Grub 2.00 menu (grub.cfg:
<A HREF="http://fm.no-ip.com/Tmp/Linux/Mdv/grub.cfg.gx27b-cauldron3-1.txt">http://fm.no-ip.com/Tmp/Linux/Mdv/grub.cfg.gx27b-cauldron3-1.txt</A> ). After
selecting a selection from a master bootloader, there's no good reason to see
similar selections as in the previous menu unrelated to the chosen selection.
IOW, when not a master bootloader (i.e. "chainloaded" via core.img, only
Mageia entries attributable to selected filesystem hosting core.img should be
in this menu.
3-Grub2 menu uses same awful spindly-looking font responsible in large part
for my distaste for *buntu
4-default menu selection for Cauldron causes this cmdline:
BOOT_IMAGE=/boot/vmlinuz-prv root=UUID=bbe8a402-5fb1-4247-b372-5bb6cff4e18c
ro splash
which is nothing like the default Grub Legacy menu stanza's cmdline result:
root=LABEL=22cauldrn splash=verbose noresume video=1152x864 vga=794 3
obviously caused by Grub2 installation disregarding content of pre-existing
menu.lst, which means
5-semi-legible blue on black graphical progress bar instead of normal
complement of startup messages when splash=verbose
6-post ESC, startup messages are inappropriately tiny
7-tty text is too tiny to use (same as startup messages; screen's preferred
mode 1600x1200 used instead of legible mode 1152x864)
8-KDM is on tty2, the location I reserve for certain class of recurring
activities, instead of where expected on tty7
9-preferred initial runlevel as evidenced by menu.lst cmdline options was not
specified
10-tty1 cleared before displaying login prompt (even after customizing
/etc/systemd/sytem/getty.target.wants/<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">getty at tty1.service</A> with
s/TTYVTDisallocate=yes/TTYVTDisallocate=no/; same problem on Rawhide &
Factory; OT)
Such displeasures as 1-9 are the reason why in Grub Legacy vs. Grub2
discussions I point out that Grub2 is still v1.0 software. Just how much of
these observations are due to upstream decisions or yet-to-dos rather than
distro implementation decisions, implementor inexperience or bugs I won't try
to guess.
--
"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 *** <A HREF="http://fm.no-ip.com/">http://fm.no-ip.com/</A>
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