make menuconfig vs genkernel --menuconfig all

[st834]

Hello,

1.I am trying to build a kernel manually, without genkernel, following the instructions standard instructions

[Banana]

Well, just building a kernel without any modification will quike likely result in a non working one.

I followed the main install handbook from the wiki: https://wiki.gentoo.org/wiki/Handbook:AMD64 and it always worked.

BUT, you need to to some research. It is not everyhing in the handbook, since there are a lot of possibilities and hardware. So you need some basic information about your setup and then look for the dedicated driver and kernel support.
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[Goverp]

[st834]

Thank you very much for your response !

I follow this guide too and in addition to the parameters I set in .config I set the recommended parameters for systemd (https://wiki.gentoo.org/wiki/Systemd). This makes the kernel behave as shown above.

I think it's not about any kernel parameter but about the difference between manual and genkernel kernel build definitions. Maybe genkernel does not use .config from the kernel source tree but uses the .config of an already loaded working kernel?

[carcajou]

Can you post here how do you build initramfs with dracut? Maybe you are missing something in kernel configuration that genkernel puts inside initramfs, but dracut does not do.

[st834]

[NeddySeagoon]

st834,

genkernel provides its own fully modular .config file. It does not use the default provided with the kernel.
Neither are good places to start if you want to build your own kernel.

The kernel provided default is probably not useful on your hardware. The genkernel default is fully modular, so it must have a matching initrd to provide the kernel modules required to mount boot.

Your

[APolozov]

IMHO best way to creating custom kernel config for newbie gento user is:
1. make mrproper && make alldefconfig
2. make localyesconfig OR make localmodconfig
Rebuild kernel: make && make modules_install install && grub-mkconfig -o /boot/grub/grub.cfg && emerge -1 @module-rebuild
and try reboot to it. If it working, tune kernel config to your own necessary options with make menuconfig
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[pietinger]

[st834]

Thank you for your answer !

I have done all this many times, but unfortunately I have not come to a working .config , which is the main reason why I wrote here.

I'll try to build the kernel again today.

Tell me what the console output drivers look like, if they are framebuffer drivers I already included them in the kernel but with the same result

Thanks !

[NeddySeagoon]

st834,

Yes, they are the framebuffer drivers but only VESA, EFI and Simple. No others.

There is a wart here too. You will also be including the DRM driver that your video card needs.
Make that a module, not built in. If its built in and broken, because some or all of the firmware is missing, the kernel may switch to it before the framebuffer drivers can output anything.

With it modular and broken, the console will output something then stop when the kernel switches to the broken driver.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[pietinger]

[st834]

I thank you for your answers !

I need a little time to try out all the solutions I received here today.

I will let you know the results.

Thank you very much !

[NeddySeagoon]

st834,

Its not as simple as 'building the kernel'

Take step back and decide if you need an initrd or not. If you decide its not required, that places constraints on how you configure the kernel.
Read my link about the PC Boot Process above.
It also provides broad outlines of the sorts of drivers you need and why.
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Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[st834]

Of course i read the link you sent me.

I don't know if initramfs is needed for me or not. i don't use separate /usr and /var, but use the btrfs file system.

I would of course try without initramfs first

Thanks !

[NeddySeagoon]

st834,

I'm not sure if root on a BTRFS subvolume needs an intitrd to mount as root or not.
The internet says you need some extra kernel parameters but if you are already doing that, that's not news.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[st834]

Hi !

I have read all the articles and specifically the framebuffer article https://wiki.gentoo.org/wiki/Framebuffer .

Now in contrast I get almost the same thing, but only, the screen clears and becomes completely blank, the lines about loading the kernel and initramfs disappear.

By the chaos of the function key illumination, I can understand that the kernel is loaded in some way, but no messages are visible as before.

But I think the cause lies in the area of framebuffer settings and I would be grateful for tips on how to diagnose it more accurately.

Thanks.

[pietinger]

st834,

do you need help anymore ? If yes, please read my last post in this thread and give us more informations. If not, you can edit the title of your first post and add a [Solved]