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F-0_ICE
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Joined: 06 Dec 2004
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 Posted: Wed May 11, 2005 5:25 pm Post subject: kernel questions |
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Just a simple question here. can somone tell me what i have to do before re-compiling the kernel 
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adaptr
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| Posted: Wed May 11, 2005 5:33 pm Post subject: |
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You have to configure it.
Just follow the steps from the handbook, they're identical to when you first installed it.
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F-0_ICE
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| Posted: Wed May 11, 2005 5:46 pm Post subject: |
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do i have to re-emerge my kernel sources?
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F-0_ICE
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| Posted: Sat Jun 18, 2005 12:54 pm Post subject: |
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found out the hard way. apparently i do have to re-emerge sources not a big deal really but more of a hassle.
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Raistlin
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Joined: 17 May 2004
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Location: Boston, MA
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| Posted: Sat Jun 18, 2005 1:37 pm Post subject: |
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| F-0_ICE wrote: | | do i have to re-emerge my kernel sources? |
Hi
I don't know what you mean by re-emerge the kernel sources? Also your initial question about re-compiling seems unclear...
if you simply want to change some configs for the kernel, you dont have to re-emerge it. only do a in the kernel dir and enable/disable the desired options.
If you want to use another kernel version, you have to download it - i.e. emerge it.
Then you might copy the original config file to the new directory. Note: it's called , therefore you won't see it by simply doing a
Also, you shld adapt the symlink linux in the /usr/src directory to point to the new sources.
Then, in the new source dir. do a , followed by a and so on.
cheers, r.
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F-0_ICE
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Joined: 06 Dec 2004
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| Posted: Sat Jun 18, 2005 1:46 pm Post subject: |
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apparently not solved... what i mean is do i have to emerge unmerge gentoo-sources and then emerge gentoo-sources?
cuz if i just simply recompile a kernel nothing seems to change or is that just me? if i do the above mentioned any changes i make take effect.
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Raistlin
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Joined: 17 May 2004
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Location: Boston, MA
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| Posted: Sat Jun 18, 2005 2:06 pm Post subject: |
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ah 
you can have several kernel versions installed in parallel. Here is a ls of mine: | Code: | $>ls -lha /usr/src/
lrwxrwxrwx 1 root root 22 May 17 14:45 linux -> linux-2.6.11-gentoo-r8
drwxr-xr-x 19 root root 4.0K Apr 21 19:40 linux-2.6.10-gentoo-r6
drwxr-xr-x 19 root root 4.0K Jun 5 17:18 linux-2.6.11-gentoo-r8
drwxr-xr-x 18 root root 4.0K May 28 13:03 linux-2.6.11-gentoo-r9
drwxr-xr-x 19 root root 4.0K Mar 5 18:13 linux-2.6.9-gentoo-r13 |
But if you emerge a newer version, the link will not be adapted. You have to do it manually: | Code: | $>cd /usr/src/
unlink linux
ln -s linux-KERNEL_VERSION linux |
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Replace KERNEL_VERSION with the apropriate numbers/names (see my example).
Then do the steps I explained in the posting before.
As soon as the newe kernel is compiled, you have to do a | Code: | | make modules_install |
and of course, you need to copy the kernel to your /boot/ directory and introduce it to your boot loader (grub, I assume).
Just ask, if you get stuck in some stage, but I would recommend you to first read the kernel howto. It might prevent you from doing any harm 
Cheers, and good luck!
R.
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F-0_ICE
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Joined: 06 Dec 2004
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| Posted: Sat Jun 18, 2005 3:30 pm Post subject: |
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interesting... never knew you could have more than one kernel on gentoo. but doesn't that take up alot of space?
regardless of that though thanks for the info.
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F-0_ICE
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| Posted: Sat Jun 18, 2005 5:18 pm Post subject: |
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heres a new one. is it possible to dowload updated kernel sources without waiting for a new gentoo release?
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adaptr
Watchman
Joined: 06 Oct 2002
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| Posted: Sat Jun 18, 2005 11:15 pm Post subject: |
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The kernel version has nothing to do with the Gentoo release.
In fact, the Gentoo release doesn't have much to do with anything - since there really aren't any.
According to the FAQ, the Gentoo release is only indicative of the LiveCDs, and only relevant in relation to the LiveCDs.
Did you read the Gentoo Kernel Guide ?
I suggest you do so.
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F-0_ICE
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| Posted: Sun Jun 19, 2005 12:25 am Post subject: |
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thanks! the kernel guide was very useful. but it did leave room for one more question: if i start a new install how would i get the latest kernel when i get to the kernel step of the installation?
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Raistlin
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Joined: 17 May 2004
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| Posted: Sun Jun 19, 2005 6:31 am Post subject: |
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by doing a | Code: | | $>emerge gentoo-sources |
you'll get the latest (stable) kernel (see : LINK).
Of course you can download either with | Code: | | ACCEPT_KEYWORDS="~x86" |
(only if you have a x86 architecture!!!)via portage, or manually from kernel.org the most recent kernel.
Cheers, R.
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syg00
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Joined: 23 Aug 2004
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Location: Brisbane, AUS
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| Posted: Sun Jun 19, 2005 6:41 am Post subject: |
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I can understand where these questions come from.
Until you emerge the sources once, emerge sync doesn't find the sources. After that you're on auto-pilot ... 
Worrying about "releases" and "latest version" are moot once you get a handle on emerge sync. |
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ferrarif5
Apprentice
Joined: 06 Sep 2003
Posts: 211
Location: Manchester, UK
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| Posted: Sun Jun 19, 2005 8:08 am Post subject: packages.keywords |
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<snip> | Raistlin wrote: |
Of course you can download either with | Code: | | ACCEPT_KEYWORDS="~x86" |
(only if you have a x86 architecture!!!)via portage, or manually from kernel.org the most recent kernel.
Cheers, R. |
If you want to latest 'unstable' kernel from portage, it's safer to do this:
| Code: | | echo sys-kernel/gentoo-sources -* ~x86 >> /etc/portage/package.keywords |
That way you can have the unstable kernel put keep the rest of your system on a stable platform.
**P.S Be aware that the latest unstable kernel needs newer versions of packages that are not marked stable yet like udev-058
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F-0_ICE
l33t
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| Posted: Sun Jun 19, 2005 3:56 pm Post subject: |
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so Raistlin, by using >emerge gentoo-sources it would download lets say kernel-2.6.11-gentoo-r11 instead of emerging the r3 version form the cd?
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Raistlin
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| Posted: Sun Jun 19, 2005 5:55 pm Post subject: |
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You downloaded or copied a portage snapshot to your filesystem. There, portage stores information about the status of the different packages, i.e. what's the latest (stable) version and so on. So if you first do a and right afterwards a | Code: | | emerge gentoo-sources |
, you'll get the latest stable kernel, unless you used ACCEPT_KEYWORDS or the method that ferrarif5 proposed. Note, that my version only downloads once the unstable sources, while ferrarif5's version would cause portage to download the unstable versions in all the future emerge attempts. You would have to delete the line | Code: | | sys-kernel/gentoo-sources -* ~x86 |
out of | Code: | | /etc/portage/package.keywords |
in order to disable this behaviour. (Just a tiny note: its /etc/portage/package.keywords and not /etc/portage/packages.keywords )
cheers, r.
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ferrarif5
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| Posted: Tue Jun 21, 2005 5:18 am Post subject: package.keywords |
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Whoops, am always sticking an s on the end of package if am not in terminal to use tab haha..
Anyways you can always set a fixed version in package.keywords then if you don't want future unstable version merging:
| Code: | | echo =sys-kernel/gentoo-sources-2.6.11-r11 ~x86 >> /etc/portage/package.keywords |
That will make sure you will only get that version of the kernel and no other unstable kernel package.
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F-0_ICE
l33t
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| Posted: Fri Jun 24, 2005 8:33 pm Post subject: |
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 can i download load the sources for 2.6.11-gentoo-r11 burn them to a cd and emerge them at the appropriate step in the installation
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adaptr
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| Posted: Sat Jun 25, 2005 12:24 am Post subject: |
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Anything you dump in /usr/portage/distfiles will be picked up when emerging.
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Kernel & Hardware
