I can boot with kernel 4.18.10, but not with 4.18.11

hariskar · Apprentice Joined: 29 Jan 2017 Posts: 170

I get no screens found error. I use nvidia drivers. Is it some new configuration in the kernel I have to do?

Keruskerfuerst · Posted: Mon Oct 01, 2018 5:45 am Post subject:

How did you configure the new kernel ?

hariskar · Apprentice Joined: 29 Jan 2017 Posts: 170

root #cd /usr/src/linux
root #make olddefconfig
root #make

but before that with
emerge -c sources of 4.18.10 were deleted (by mistake) and re-installed. I guess all configuration of config file of 4.18.10 is lost?

joanandk · Apprentice Joined: 12 Feb 2017 Posts: 169

hariskar · Apprentice Joined: 29 Jan 2017 Posts: 170

Yes I did. I have done the proceedure many times with previous kernel updates without problem.

toralf · Posted: Mon Oct 01, 2018 10:56 am Post subject:

hariskar · Apprentice Joined: 29 Jan 2017 Posts: 170

I don't have such a file.. Will I stay with 4.18.10 forever??

toralf · Posted: Mon Oct 01, 2018 1:52 pm Post subject:

Yamakuzure · Posted: Mon Oct 01, 2018 2:07 pm Post subject:

The old config is in
/usr/src/linux-4.18.10-gentoo/.config
and stays there when you unmerge the sources.

The new config will be in
/usr/src/linux-4.18.11-gentoo/.config

The simplest way is to copy the old .config into the new folder and run 'make oldconfig' and not olddefconfig. That one will set new symbols to their default value without prompting, which was not what I wanted in many cases. Like supporting new hardware, which always defaults to Y.

However, normally a patchlevel update never yields any additions/removals that would make 'oldconfig' prompt for anything...

Well, you *did* remember to run 'emerge @module-rebuild" after building the new kernel?
_________________
Edited 220,176 times by Yamakuzure

hariskar · Apprentice Joined: 29 Jan 2017 Posts: 170

'emerge @module-rebuild"
was the solution!

But I wonder why. I never run it and never had problems..

Thank you!

Tony0945 · Posted: Mon Oct 01, 2018 4:58 pm Post subject:

Amplifying Toralf's remarks:

When you make menuconfig, under "General Setup" you with find a checkbox " Enable access to .config through /proc/config.gz "
This will enable CONFIG_IKCONFIG_PROC which will do as it says. So if you ever lose the .config you can restore it from the running kernel with

ups · n00b Joined: 06 Sep 2018 Posts: 14

k9dog · Posted: Sun Mar 27, 2022 9:25 am Post subject:

Well answered a bit off topic in my previous posts.

Copying your old configuration is answered with the previous answers and I think your own solution with emerge @module-rebuild was your answer.

It might be an idea to create a new kernel from scratch though (if you can boot more than one

)

I think I'd go with a new boot cd (you could "-o loop" mount the iso, the config is in /boot).
I would copy the config into a recent kernel source as .config.
Update system if you haven't and can
Since you are running nvidia proprietary driver, i would disable the nouveau driver.
I'd run : lspci | grep VGA to see my driver
Visit https://www.nvidia.com/Download/index.aspx to search for my driver version
Install the driver: emerge =x11-drivers/nvidia-driver-<version> (or something close but not later)
^^ You could install after you build kernel too, otherwise emerge @module-rebuild rebuilds
(I'll presume grub and genkernel is installed)
For compile of kernel I use this script: