Thank's, I will try probably end of august At this point, I could use the 6.12.96 kernel in standard startup mode with option "dis_ucode_ldr" set in default grub startup variable
Best regards Jerome -----Message d'origine----- De : Salvatore Bonaccorso <[email protected]> Envoyé : mercredi 29 juillet 2026 16:38 À : jerome Favrel <[email protected]> <[email protected]>; [email protected] Objet : Re: Bug#1142099: /usr/share/bug/linux-image-6.12.95+deb13-amd64-unsigned/include-1cmdline: Kernel 6.12.95 does not start boot sequence without setting acpi=off or recovery mode (logs in this mode) Control: tags -1 + moreinfo Hi Jerome, I see you had some progress on making the system boot. We would still be interested in isolating the problem, so given you can reliably assert the problem and if I understood correctly this is an experienced regression from upgrading to 6.12.95? Which was the previously last working kernel? Once we have this range, could you please bisect the problem with the following procedure, let's assume 6.12.94-1 was the last working one and with 6.12.95-1 you fist experienced the problem, then bisecting would involve compiling and testing a couple of kernels. git clone --single-branch -b linux-6.12.y https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git cd linux-stable git checkout v6.12.94 cp /boot/config-$(uname -r) .config yes '' | make localmodconfig make savedefconfig mv defconfig arch/x86/configs/my_defconfig # test 6.12.94 to ensure this is "good" make my_defconfig make -j $(nproc) bindeb-pkg ... install the resulting .deb package and confirm it successfully boots # test 6.12.95 to ensure this is "bad" git checkout v6.12.95 make my_defconfig make -j $(nproc) bindeb-pkg ... install the resulting .deb package and confirm it fails to boot With that confirmed, the bisection can start: git bisect start git bisect good v6.12.94 git bisect bad v6.12.95 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 and if the problem is hit run: git bisect bad and if the problem doesn't trigger run: git bisect good . 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 bad 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. Regards, Salvatore
