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sk8harddiefast
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PostPosted: Fri Feb 14, 2014 4:41 pm    Post subject: How to setup new configured kernel on grub? Reply with quote

I finally download the latest Linux Kernel and I configure it. But how to boot from it?
I make emerge-sources
I eselect kernel list and set it to the newest kernel
I go to /usr/src/linux
I run make xconfig
I compile kernel (make, make modules_install, make install)
I cp /usr/src/linux/arch/x86_64/boot/bzImage /boot/kernel-3.13.2-gentoo
I rebooted but still boot the previous generic kernel
How to make it boot my new configured kernel?
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smerf
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PostPosted: Fri Feb 14, 2014 4:58 pm    Post subject: Reply with quote

Which bootloader do you use?

Maybe you just forgot to configure it?

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=10
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sk8harddiefast
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PostPosted: Fri Feb 14, 2014 5:30 pm    Post subject: Reply with quote

I use grub2. As far as I remember I run this:
Installing GRUB2
Code:

# emerge sys-boot/grub
# grub2-install /dev/sda
# grub2-mkconfig -o /boot/grub/grub.cfg

Grub configure my genkernel but now I want to change to newone and remove the old kernel when I will be sure that my new kernel work fine.
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smerf
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PostPosted: Fri Feb 14, 2014 5:45 pm    Post subject: Reply with quote

You need to:
Code:
mount /boot
grub2-mkconfig -o /boot/grub/grub.cfg


If you are afraid that this will destroy your previous config backup /boot/grub/grub.cfg first.
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sk8harddiefast
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PostPosted: Fri Feb 14, 2014 5:56 pm    Post subject: Reply with quote

Ok. I made it and found the new kernel. But still boot the old.
Remove the old kernel from /boot and run again the command or this is a bad idea?
On my /boot now I have this:
Code:
ember@gentoo /boot $ ls
config-3.13.2-gentoo
grub
initramfs-genkernel-x86_64-3.10.25-gentoo
kernel-genkernel-x86_64-3.10.25-gentoo
linux-3.13.2-gentoo
lost+found
System.map-3.13.2-gentoo
System.map-genkernel-x86_64-3.10.25-gentoo
vmlinuz-3.13.2-gentoo

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PostPosted: Fri Feb 14, 2014 6:15 pm    Post subject: Reply with quote

Have a look at /etc/default/grub: GRUB_DEFAULT=0 means boot first entry, you can use GRUB_DEFAULT=saved to boot last used entry.

Remember to run grub2-mkconfig -o /boot/grub/grub.cfg each time you modify /etc/default/grub

And definitely read: http://wiki.gentoo.org/wiki/GRUB2 (you may find also some EFI related answers there)
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PostPosted: Fri Feb 14, 2014 6:38 pm    Post subject: Reply with quote

PS: of course you can remove old kernel, but first make sure that the new one works fine.
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sk8harddiefast
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PostPosted: Fri Feb 14, 2014 7:20 pm    Post subject: Reply with quote

Ok. I made it. But now I have no X. It tells me than nvidia not found. I have nvidia-drivers installed and modprobe nvidia tells me that not found. Any idea?
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PostPosted: Fri Feb 14, 2014 7:42 pm    Post subject: Reply with quote

You made new kernel, now it is time to rebuild the modules. You have nvidia-drivers installed, but for old kernel.
Code:
emerge --ask @module-rebuild

https://wiki.gentoo.org/wiki/Kernel/Upgrade
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Juippisi
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PostPosted: Fri Feb 14, 2014 9:36 pm    Post subject: Reply with quote

Also, I recommend you to read http://forums.gentoo.org/viewtopic-t-982630.html since newest nvidia-drivers dont go hand-in-hand with newest kernel-sources (>3.13). Works fine with 3.12 and 3.10 though.
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PostPosted: Sun Feb 16, 2014 3:05 pm    Post subject: Reply with quote

You are too late. I already made the mistake :( I have messed all the system :(
Nvidia gave me acpi_os_event error but I fix that. Compiled ok. Modprobe also load it. I tried to rebuild everything and now gobject-introspection refuses to be built :(
See here: http://forums.gentoo.org/viewtopic-t-984222.html
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