On Tue, Mar 23, 2021 at 12:37 PM Gidi Gal wrote: > Greetings, > > After receiving a lot of information regarding my query on how to switch > from installed to dev kernel (thank you to all the people that shared their > knowledge on this subject), I am now facing "invalid signature" error when > I reboot with my installed dev kernel. I shared the logs for the build, > install and also .config and x509.genkey in the following link > > . > Please let me know what additional information can help to solve this > issue. > > I am following the instructions in https://kernelnewbies.org/FirstKernelPatch > > and I am at the step where I am supposed to verify that a printout was > added to the log after I reboot my dev kernel. > > Thanks, > Gidi > Gidi, From your build.log I see you compiled that kernel 6 times: Kernel: arch/x86/boot/bzImage is ready (#6) And the install log tells me: Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/50_linuxmint.cfg' Sourcing file `/etc/default/grub.d/init-select.cfg' I am curious are you using linux mint or Debian ? I also see: CC drivers/cpufreq/cpufreq_ondemand.o drivers/cpufreq/cpufreq_ondemand.c: In function ‘od_set_powersave_bias’: drivers/cpufreq/cpufreq_ondemand.c:446:1: warning: the frame size of 1032 bytes is larger than 1024 bytes [-Wframe-larger-than=] 446 | } | ^ This is what causes the compile time errors with possible missing firmware :-) and all the kernels you have you can boot into by selecting 'Advanced options' in the grub menu then choosing the kernel you wish to use. Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/50_linuxmint.cfg' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.12.0-rc3-GIDI-DEV+ Found initrd image: /boot/initrd.img-5.12.0-rc3-GIDI-DEV+ Found linux image: /boot/vmlinuz-5.12.0-rc3-GIDI-DEV+.old Found initrd image: /boot/initrd.img-5.12.0-rc3-GIDI-DEV+ Found linux image: /boot/vmlinuz-5.4.0-64-generic Found initrd image: /boot/initrd.img-5.4.0-64-generic Found linux image: /boot/vmlinuz-5.4.0-58-generic Found initrd image: /boot/initrd.img-5.4.0-58-generic Adding boot menu entry for UEFI Firmware Settings Disabling secure boot should make your invalid signature error go away. Hope this helps - Aruna