[SOLVED] Using CD kernel instead of compiling kernel

mazingaz · n00b Joined: 24 Jan 2006 Posts: 43

hi guys. I am trying to use the precomplied kernel from the minimal live cd. If so do i still need to emerge gentoo-sources?

nixnut · Posted: Tue Apr 24, 2007 4:52 pm Post subject:

If you use the livecd kernel, you don't need any kernel sources to have a bootable system. But some packages may depend on the kernel sources. So, it's likely your system will want to install kernel sources at some point.
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mazingaz · n00b Joined: 24 Jan 2006 Posts: 43

ic... then is there a way to have cd kernel source copied on to the boot?

mazingaz · n00b Joined: 24 Jan 2006 Posts: 43

let me re-phrase that.
how can i copy cd kernel source into /usr/src/linux

Ph0eniX · Posted: Tue Apr 24, 2007 6:32 pm Post subject:

The big question is: why would you want to?
I have gotten a system to work using the kernel from the livecd before but I don't remember the exact steps. In the least you'll need to copy "gentoo.igz" and "gentoo" plus everything in /lib/modules to the right directories on the hard drive. I don't recommend this procedure.

A much nicer thing to do is to copy the kernel configuration from /proc - the file is named "config.gz" (it's compressed - you need to gunzip it) - you can use it to build your own kernel with the same options as the livecd one. If you don't like menuconfig - just use genkernel with the config file.

The syntax is:

Ph0eniX · Posted: Tue Apr 24, 2007 6:36 pm Post subject:

In addition, what's in /usr/src/linux is the kernel source code. That's not what's being used to boot the system. The files in /boot are compiled binaries and that's what you need in order for Linux to boot. I don't believe the kernel source is included on the live CD.

gerard27 · Posted: Tue Apr 24, 2007 7:06 pm Post subject:

Hi All,
I think this might give problems emergeing some progs.
I know for sure there are some ebuilds that check the kernel
source files.
Try making the "linux" symlink in /usr/src to point to an older linux file or to something else
and nvidia for sure will refuse to install!
G.

Ph0eniX · Posted: Tue Apr 24, 2007 7:42 pm Post subject:

mazingaz · n00b Joined: 24 Jan 2006 Posts: 43

Ph0eniX · Posted: Tue Apr 24, 2007 8:39 pm Post subject:

Try the ATI framebuffer instead of VESA:

Kernel config option:

Ph0eniX · Posted: Tue Apr 24, 2007 8:43 pm Post subject:

Also, you can find grub.conf on the livecd in /mnt/cdrom/isolinux - the file is named isolinux.cfg. Just see what video options it uses.

mazingaz · n00b Joined: 24 Jan 2006 Posts: 43

Dang..
After installing grub and writing the script shown in the handbook grub splash image fail to execute
as soon as it boots it will become blank and goes into the loading kernel with large console fonts.
I will uninstall grub and reinstall grub.

Ph0eniX · Posted: Wed Apr 25, 2007 2:34 pm Post subject:

mazingaz · n00b Joined: 24 Jan 2006 Posts: 43

I was never able to use framebuffer with genkernel. I tired it with aty128fb vesafb-tng and none of them worked.
Here is one thing i am not too sure of. If i recompile the genkernel does it also create initramfs at boot?
what is the exact boot script have to be for the genkernel frambuffer option using vesafb?

currently I have it as following

root (hd0,0)
kernel /boot/kernel-genkernel-x86-2.6.20-gentoo-r6 root=/dev/ram0 init=/linuxrc ramdisk=8192 real_root=/dev/hda3 udev
initrd /boot/initramfs-genkernel-x86-2.6.20-gentoo-r6 vga=0x318 video=vesafb:mtrr:3,ywrap (also tried with the livecd grub.conf vga=791 splash=silent)

nixnut · Posted: Thu Apr 26, 2007 4:23 pm Post subject:

Moved from Installing Gentoo to Kernel & Hardware.
Not about getting gentoo installed, so moved here.
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Please add [solved] to the initial post's subject line if you feel your problem is resolved. Help answer the unanswered

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jburns · Posted: Thu Apr 26, 2007 5:49 pm Post subject:

Ph0eniX · Posted: Fri Apr 27, 2007 2:41 pm Post subject:

mazingaz · n00b Joined: 24 Jan 2006 Posts: 43

Thanks guys~ it worked...~~ you guys are a best

Ph0eniX · Posted: Fri Apr 27, 2007 6:11 pm Post subject: