On Sat, Apr 02, 2011 at 03:51:52PM -0400, Ed Nisley wrote:
> On Sat, 2011-04-02 at 15:33 +0100, Steve Blackmore wrote:
> > The custom kernel says edit menu.lst - doesn't exist any more
>
> The Grub2 file is /boot/grub/grub.cfg. It looks different, but gets
> basically the same treatment as Grub1's menu.lst.
>
> But it's actually worse than that. The grub.cfg file gets rewritten
> every time there's a kernel update; there's a warning at the top of the
> file to *not* hand-edit it. You're supposed to futz with the
> configuration files in (IIRC) /etc/grub that tell Grub2 how to
> automagically create grub.cfg as part of the kernel update.
It's still fairly simple, I think. From my notes from last time I was in
there:
GRUB2: Edit /etc/default/grub , then run update-grub, which updates
/boot/grub/grub.cfg
> HOWEVER, I've been unable to figure out how to do something special with
> the RTAI-modified kernel: there's no way (that I can find) to *not*
> regenerate a standard kernel boot line for the RTAI kernel.
> So whenever I hand-edit grub.cfg, I add a note to the RTAI menu entry
> showing that it's decorated with isolcpus=1. After every kernel update,
> that note vanishes: it's time to edit grub.cfg again.
>
> Maybe there's a way to do that automagically, but ...
Yes, if you're as forgetful as me, it's tempting to whack together a
simple wrapper script around update-grub, to auto post-edit the boot
command. If a post on e.g. ubuntu-users doesn't elicit a kosher way to
make grub take boot parameters, then I'll cheerfully whack together a
Q&D fix. But the script won't be there on a new install, only on a
kernel update or boot sequence tweak. Is that good enough?
Erik
--
Leibowitz's Rule:
When hammering a nail, you will never hit your finger if you hold the hammer
with both hands.
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