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Old 03-28-2013, 08:18 PM   #1
Siljrath
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How to add features to a kernel, what steps and why these steps are taken.


currently in my crunchbang [debian], i have the libre kernel from the [ deb http://linux-libre.fsfla.org/pub/linux-libre/freesh/ freesh main ] freesh repo, thnx to the fsfla guys.

but as it comes out of the repo, there's no support for either virtualbox, nor remastersys.

ok, so fine, i understand i will thus likely need to get the source of the libre kernel, and add the necessary options for these to be compiled in.

... on the general concept, i get it. but in practice, i'm lost in dense fog.

could someone take my hand and show me how this is achieved?

i remember a long while ago following other walkthroughs, of looking at a text file config, and other times (like when installing gentoo) doing it through menus...

if i can just paste a few lines into the config and run whatever make whatever, then that's great...
but um...
as i say...
i dont really know what, where, how and why.
the last two there [how and why] are what i most want to walk away from this with having a clear idea of. fair enough if i get my kernel working and able to do virtualbox and run remastersys [fed a fish], but what i really want is to know enough of what i'm doing for next time i encounter something i want to add to a kernel [know how to fish].

many times, i've taken stabs at kernel meddling, and it has never gone well, often resulting in many many hours reading documentation and tutorials that numb the brain with apparent irrelevancies, and then i end up giving up, and not returning to try again for months... so this time i thought i'd ask direct, to see if i can get standing on my own two legs when it comes to simply adding a couple features to a kernel.

i understand there's now a way one can extract the config from an existing kernel, right? so i could just take that, and paste in what i need... is that right? so how's all this done?

massive thanks for any help clearing up the fog.


- P.S.
-- debian remaster sys needs "squashfs-modules for your kernel and either aufs-modules or unionfs-modules before you install remastersys".
-- "The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing '/etc/init.d/vboxdrv setup' as root. If it is available in your distribution you should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary." - says the error message that pops up when attempting to launch a virtual machine in virtualbox. ... which i'm sure i tried a while ago.

Last edited by Siljrath; 03-28-2013 at 08:26 PM. Reason: ps
 
Old 03-30-2013, 08:53 AM   #2
jens
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Quote:
currently in my crunchbang [debian], i have the libre kernel from the [ deb http://linux-libre.fsfla.org/pub/linux-libre/freesh/ freesh main ] freesh repo, thnx to the fsfla guys.
The Debian kernel images are already blob-free.
The non-free blobs are in the firmware-linux-nonfree package (in the non-free repo).

No need to take it from external sources (just don't install the firmware-linux-nonfree package if you wish to keep it "libre").

Install the debian one from the official debian repos (linux-image-*) and everything will work as expected again:

#apt-get install linux-image-$(uname -r)
#reboot
(and boot your debian kernel)

PS:

*Installing Virtualbox:
#apt-get install virtualbox (reboot or load your module to use it)

*Installing Remastersys (not available in wheezy):
Quote:
I setup a signed repo for wheezy now:

To add my repo key as root:

wget -O - http://www.remastersys.com/debian/remastersys.gpg.key | apt-key add -

To add the repo to /etc/apt/sources.list, add these lines:
deb http://www.remastersys.com/debian wheezy main
deb-src http://www.remastersys.com/debian wheezy main

Now you can apt-get remastersys, remastersys-gui and the yad packages instead of manually downloading them.

The newest package with the updated installer is only on the repo right now. If testing goes well, this will be the release.
http://www.remastersys.com/forums/in...16942#msg16942

Last edited by jens; 03-30-2013 at 11:12 AM.
 
  


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