Bug#1111184: linux: Kernel panic on boot with amdgpu driver
Hello Salvatore sorry for long response but i can't do bisection as
you say because my disk is not be in good and my system specs maybe
dont be good for bisect at this time maybe be another think how to
find bug ?
сб, 6 сент. 2025 г. в 14:31, Salvatore Bonaccorso <carnil@debian.org>:
>
> Control: tags -1 + moreinfo
>
> Hi,
>
> On Mon, Aug 25, 2025 at 12:15:02AM +0300, Руслан Семченко wrote:
> > Hello, Salvatore. I have completed the tests as requested. I can
> > confirm that the 6.13.2-1~exp1 kernel is GOOD, while the
> > 6.13~rc7-1~exp1 kernel is BAD.
>
> Thanks, that is good so we have a good range of version narrow enough
> to start now the bisect. Here is what you can do next (I updated the
> arlier instructions with the now concrete numbers, important is to
> redefine the "bisection" terms and then carefully at each step say if
> it is "fixed" or "broken");
>
> git clone https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
> cd linux-stable
> git checkout v6.13.2
> cp /boot/config-$(uname -r) .config
> yes '' | make localmodconfig
> make savedefconfig
> mv defconfig arch/x86/configs/my_defconfig
>
> # test 6.13.2 to ensure this is "good"
> make my_defconfig
> make -j $(nproc) bindeb-pkg
> ... install the resulting .deb package and confirm it successfully boots / problem does not exist
>
> # test 6.13~rc7 to ensure this is "bad"
> git checkout v6.13-rc7
> make my_defconfig
> make -j $(nproc) bindeb-pkg
> ... install the resulting .deb package and confirm it fails to boot / problem exists
>
> Once it is confirmed that this affects so as well the version ranges
> upstream, we can proceed:
>
> git bisect start --term-new=fixed --term-old=broken
> git bisect fixed v6.13.2
> git bisect broken v6.13-rc7
>
> (note this is important, as usually git bisect "direction" is to
> determine a breaking commit, but here we want to identify a fixing
> commit and so the git bisect terms are redifinied to not always have
> to "flip" mentally the meaning of bad and good).
>
> In each bisection step git checks out a state between the oldest
> known-bad and the newest known-good commit. In each step test using:
>
> make my_defconfig
> make -j $(nproc) bindeb-pkg
> ... install, try to boot / verify if problem exists
>
> and if the problem is hit run:
>
> git bisect broken
>
> and if the problem doesn't trigger run:
>
> git bisect fixed
>
> . Please pay attention to always select the just built kernel for
> booting, it won't always be the default kernel picked up by grub.
>
> Iterate until git announces to have identified the first 'fixed'
> commit.
>
> Then provide the output of
>
> git bisect log
>
> In the course of the bisection you might have to uninstall previous
> kernels again to not exhaust the disk space in /boot. Also in the end
> uninstall all self-built kernels again.
>
> Is this all of enough help for you?
>
> Regards,
> Salvatore
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