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myha
Apprentice
Joined: 16 Sep 2005
Posts: 152
Location: Ljubljana, Slovenia
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 Posted: Mon Sep 19, 2005 10:24 am Post subject: kernel compilation |
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Hi all!
I installed gentoo yesterday with few minor problems but I managed to fix them and so far Im very pleased with gentoo. The only thing left is enabling my eth card and as far as I saw using search I forgot to include support when I compiled kernel... So I have to do it again.
My question is: If I follow instructions from install guide and recompile my kernel, will I have to reconfigure everything else also (like grub conf, fstab etc) or that stays untouched and I just compile kernel and add it to grub? I would also like to know where is the diffrence in M and * when compiling kernel, how to know what to select? Is there any guide that would explain that maybe, possibly explain what is every module for?
I read that I have to run and from liveCD to see which hardware it detects and I have to enable that in kernel compilaton... But the output (especially from dmesg) is pretty long, is there any way to display only modules and not everything else?
Im pretty new to linux, I used ubuntu before because its easier to install, but now I decided to switch to smth more serious and learn it... So if there is anything else I need to know before I compile kernel please tell me... 
Thank you,
Miha
edit: OK I know im a bit lazy, i found this in wiki:
| Code: | | When you see an '[M]' next to an option it means it will compile as a module. When you see an '[*]' next to an option it means it's compiled into the kernel. The difference is "modules" are not a part of the kernel; they are similar to what Windows users may think of as `drivers`. Modules must be loaded manually. The built-in parts of the kernel are just that; they do not need to be manually loaded. |
If I understand it right I can select * for modules to load with kernel and M for manual loading of modules... |
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widu
Guru
Joined: 05 Jun 2004
Posts: 333
Location: Freiburg
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| Posted: Mon Sep 19, 2005 10:46 am Post subject: |
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First of all, you should know wich ehternet-controller you've got:
| Code: | lspci | grep -i ether
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should show you brand and model. then search for the right driver in menuconfig. I would choose to compile it as a module, because 1. you don't have to recompile the hole kernel, 2. you don't have to reboot
so choose M for your ethernet controler, save and leave menuconfig. then
| Quote: | | make modules && make modules_install |
then load the module with modprobe and start eth0
| Code: | | /etc/init.d/net.eth0 start |
if you have choosen the right module your network card should work.
last step:
put the module in /etc/modules.autoload.d/kernel-2.6
have fun!
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fangorn
Veteran
Joined: 31 Jul 2004
Posts: 1886
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| Posted: Mon Sep 19, 2005 10:49 am Post subject: |
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If unsure use the genkernel "walkthrough"
lspci lists the detected hardware. look for lines containing "Ethernet controller" to know your network interfaces. If the needed kernel driver is not clear, type in the name of the card into the forum search and you will find the proper driver in most cases. Same for the onboard chips like IDE/SATA controllers, Sound, modem, ...
Edit:
Too slow again  |
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myha
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Joined: 16 Sep 2005
Posts: 152
Location: Ljubljana, Slovenia
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| Posted: Mon Sep 19, 2005 11:00 am Post subject: |
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Thanks for your quick answer...
I realise that module would be better solution, but I want to add support for bootsplash so I have to recompile whole kernel...
If I recompile kernel how are things diffrent? If I do does it use the same configuration I have now and I just add the things I want? |
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widu
Guru
Joined: 05 Jun 2004
Posts: 333
Location: Freiburg
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| Posted: Mon Sep 19, 2005 12:22 pm Post subject: |
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| myha wrote: | Thanks for your quick answer...
I realise that module would be better solution, but I want to add support for bootsplash so I have to recompile whole kernel...
If I recompile kernel how are things diffrent?
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after compiling the new kernel you have to copy bzImage and Systemmap to /boot (and of course have /boot mounted if it is on a seperate partition). If you gave the new kernel a different name, you have to edit /boot/grub/grub.conf as well.
| Quote: | | If I do does it use the same configuration I have now and I just add the things I want? |
yes indeed.
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