How do you generate the config file?
srishti sharma
srishtishar at gmail.com
Mon Jan 30 16:51:26 EST 2017
After cloning greg kroah hartman's repository from the tutorial , I am
not able to boot into any kernel by default and have to choose from
advanced ubuntu options from the grub menu . In the advanced ubuntu
options I see generic kernels ,and one rc3+ kernel . I think that's
the one I need to boot in . Am I wrong ? Also when I am trying to boot
in the rc3+ kernel my computer gets stuck and I am unable to boot .
What do I do ? Please help me .
On Mon, Jan 30, 2017 at 9:34 AM, Pranay Srivastava <pranjas at gmail.com> wrote:
> On Mon, Jan 30, 2017 at 6:04 AM, Abel <akronix5 at gmail.com> wrote:
>>
>> Yes, similar procedure I've followed.
>> I didn't forget step 4. I actually always did `sudo make install_modules`. I'm not sure what's going on.
>>
>> Maybe it has sth to do with Ubuntu, that's why specifically mention I was using Ubuntu.
>>
>> Maybe I can try with some other distro. Probably Manjaro has better support for latest kernel releases.
>>
>> It's late here. I'll keep trying and let you know in case I figure out sth.
>
> Ok so probably some modules got missed while building your custom kernel.
> Perhaps you can zcat /boot/config-$(uname -r)
> and store it as .config to your custom
> kernel source location?
>
> Then probably try and remove what you don't need? and see if it works.
>
>>
>> On Jan 30, 2017 1:27 AM, "Guru Das S" <gurooodas at gmail.com> wrote:
>>
>> On 29 January 2017 at 16:19, Abel <akronix5 at gmail.com> wrote:
>> > I've posted a mail with the screenshot (waiting for moderation) when I try
>> > to boot from make defconfig built kernel. Basically the kernel doesn't boot
>> > because "Missing modules (cat /proc/modules; ls /dev " it says...It's the
>> > same screen that appeared when I tried using make oldconfig pressing enter
>> > for default values.
>> >
>> > I tried using make localmodconfig but It again asks for many config params
>> > that I don't know anything about.
>> >
>> > Saludos,
>> >
>> > Abel.
>>
>> Hi Abel,
>>
>> The procedure I followed in order to compile, install and boot my
>> custom compiled kernel is:
>>
>> 1. Copy .config from existing distribution to kernel tree.
>>
>> 2. Run make localmodconfig (I also got a bunch of prompts for
>> parameters I had no idea about. I just pressed down Enter till the
>> stream of options stopped flowing!)
>>
>> 3. Run make -j<N> where N is a good number for your system.
>>
>> 4. Run make modules_install
>>
>> 5. Run make install (This ran update-grub for me at the end, though,
>> which was convenient)
>>
>> That's it. I was able to boot into this newly compiled kernel via
>> grub's selection menu upon rebooting. I think you may have missed
>> doing Step 4 above.
>>
>>
>> Guru Das Srinagesh.
>>
>>
>> >
>> > On 30 January 2017 at 01:11, Abel <akronix5 at gmail.com> wrote:
>> >>
>> >> Hi.
>> >>
>> >> I just built using make defconfig and it, again, doesn't boot. Instead it
>> >> displays the error that I've described before (sorry I forgot to attach the
>> >> screenshot, I attach it here).
>> >>
>> >> As I already stated, neither /boot/${uname -r} nor make oldconfig work for
>> >> me, they both show the screen above.
>> >>
>> >> Saludos,
>> >>
>> >> Abel.
>> >>
>> >> On 30 January 2017 at 01:08, Guru Das S <gurooodas at gmail.com> wrote:
>> >>>
>> >>> On 29 January 2017 at 15:32, 慕冬亮 <mudongliangabcd at gmail.com> wrote:
>> >>> > Hello,
>> >>> > If you want to reuse the config of current kernel, you can use
>> >>> > `make oldconfig` to generate config file.
>> >>> >
>> >>> > --
>> >>> > My best regards to you.
>> >>> >
>> >>> > No System Is Safe!
>> >>> > Dongliang Mu
>> >>> >
>> >>> > 2017-01-29 18:24 GMT-05:00 Ozgur Karatas <mueddib at goosey.org>:
>> >>> >>
>> >>> >> Hello,
>> >>> >>
>> >>> >> you can get .config files in two ways, firstly get the existing
>> >>> >> .config file
>> >>> >> and compile to kernel.
>> >>> >>
>> >>> >> $ cp /boot/config-x.x.x /bla/linux/.config
>> >>> >>
>> >>> >> Second, use the generate command:
>> >>> >>
>> >>> >> $ make defconfig
>> >>> >>
>> >>> >> Regards,
>> >>> >>
>> >>> >> ~Ozgur
>> >>> >>
>> >>> >> 30.01.2017, 01:18, "Abel" <akronix5 at gmail.com>:
>> >>> >>
>> >>> >> Hi!
>> >>> >>
>> >>> >> Where do you get the config file from? or do you generate it yourself?
>> >>> >>
>> >>> >> I'm using xUbuntu 16.04 in a VM inside VMWare, following the
>> >>> >> instructions
>> >>> >> described in kernelnewbies wiki. (By the way, the download links to
>> >>> >> the iso
>> >>> >> images of Ubuntu don't work for me)
>> >>> >>
>> >>> >> If I copy the latest config file in /boot, kernel 4.4.0, it starts to
>> >>> >> ask me
>> >>> >> many config parameters that I don't know what to answer. I tried to
>> >>> >> press
>> >>> >> always <enter> to set up the default parameters, but after compiling I
>> >>> >> get
>> >>> >> an error trying to boot from that kernel (see atachment).
>> >>> >>
>> >>> >> I tried with make menuconfig and that seems to work, but it takes too
>> >>> >> long
>> >>> >> because it builds and includes many many drivers modules.
>> >>> >> Yeah, I know I could navigate through the ncurses window and select
>> >>> >> the
>> >>> >> stuff I want and deselect what I don't want, but I'd rather prefer
>> >>> >> just a
>> >>> >> simple config file that builds and works and don't waste time in
>> >>> >> understanding all the stuff that it's in there.
>> >>> >>
>> >>> >> So, isn't there a way to get a simple config file just to develop
>> >>> >> kernel
>> >>> >> stuff for an Ubuntu image?
>> >>> >> I've even gone to the kernel ppa sources for Ubuntu:
>> >>> >> http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.5/; but it only
>> >>> >> provides
>> >>> >> a patch using the debian config files (which don't come from git
>> >>> >> sources of
>> >>> >> course).
>> >>> >>
>> >>> >> I just want a config file, copy it to the kernel root code and
>> >>> >> compile.
>> >>> >>
>> >>> >> Greetings,
>> >>> >>
>> >>> >> Abel
>> >>> >>
>> >>> >>
>> >>> >> _______________________________________________
>> >>> >> Kernelnewbies mailing list
>> >>> >> Kernelnewbies at kernelnewbies.org
>> >>> >> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>> >>> >>
>> >>> >
>> >>> > _______________________________________________
>> >>> > Kernelnewbies mailing list
>> >>> > Kernelnewbies at kernelnewbies.org
>> >>> > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>> >>>
>> >>> Hi Abel,
>> >>>
>> >>> To add to what Ozgur said, you may first copy the existing .config
>> >>> file that comes along with your Linux distribution to your kernel
>> >>> tree, and then use:
>> >>>
>> >>> $ make localmodconfig
>> >>>
>> >>> instead of defconfig. A quick Google search should tell you the
>> >>> differences between the two - and from what I've read, localmodconfig
>> >>> is preferred to defconfig.
>> >>>
>> >>> Hope this helps.
>> >>>
>> >>>
>> >>> Guru Das Srinagesh.
>> >>
>> >>
>> >
>>
>>
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
>> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>
>
>
> --
> ---P.K.S
>
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