John Dangler wrote:
> I changed some options to the menuconfig (trying to get that splash
> to work), and saved the changes to an alternate config file.
> I'd like to make a kernel with _that_ config file and keep it
> separate from my default 2.6-r12 kernel, since, when the splash
> causes the panic, I have some way to get back in.
>
> How do I compile a new kernel that I can add to the grub.conf with
> the alternate config ?
Just copy it in /boot with a different name, and add an entry in
grub.conf for that. For future reference, I also always save the
config files in a dedicated directory.
Example (with a lot of fantasy, I name kernels using their version
number, but that's of course just personal preference):
# ls /boot
2.6.11.11 Sytem.map-2.6.11.11
This is where I save the configs (again, you might want to do it
differently):
# ls /root/conf
2.6.11.11.conf
Relevant section of grub.conf:
title 2.6.11.11
root (hd-whatever,n)
kernel (hd-whatever,m)/2.6.11.11 root=/dev/hda3
Now suppose I want to do some tests with new features, so this is what
I do:
# cd /usr/src/linux
# make mrproper (I think this is not strictly required, I usually
do it)
# make menuconfig
(load the config file from /root/conf/2.6.11.11.conf, adjust what you
want to change, and save the config back to /root/conf but with a
different name to preserve the old one,
e.g. /root/conf/2.6.11.11-newfeatures.conf
Optionally you may also want to append an EXTRAVERSION to the kernel
version - something that will show up when you do "uname -a" - IIRC
there's now a dedicated menuconfig entry to do this, otherwise you
can just edit the Makefile after menuconfig)
# make && make modules_install
# cp arch/i386/boot/bzImage /boot/2.6.11.11-newfeatures
(Optional, but I usually do this, expecially if I set the
extraversion)
# cp System.map /boot/System.map-2.6.11.11-newfeatures
Edit grub.conf, and add a line like this after the existing one:
title 2.6.11.11-newfeatures
root (hd-whatever,n)
kernel (hd-whatever,m)/2.6.11.11-newfeatures root=/dev/hda3
Reboot and you'll see both entries in the grub boot menu.
Hope this helps.
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