I am grateful for your replies, Brend, Valdis and Bjørn.
I did some backups, decided for now to try and run my kernel on my native Linux, until I prepare a VM for testing.
I tried to install my kernel. The output showed some errors (I copied the install log at the bottom of this email). I think these errors led to an "invalid signature" error later on when I rebooted my machine.
I would be grateful if you could take a look and comment about possible solutions. Regarding my CONFIG_LOCALVERSION, it is set as follows:
CONFIG_LOCALVERSION="-GIDI_DEV"
Here is the installation output (if there's a different preferable way to attach such info, please let me know) :
gidi@gidi-Precision-3510:~/git/kernels/staging$ sudo make modules_install install
[sudo] password for gidi:
INSTALL arch/x86/crypto/aesni-intel.ko
...
INSTALL sound/soundcore.ko
DEPMOD 5.12.0-rc3-GIDI_DEV+
sh ./arch/x86/boot/install.sh 5.12.0-rc3-GIDI_DEV+ arch/x86/boot/bzImage \
System.map "/boot"
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 5.12.0-rc3-GIDI_DEV+ /boot/vmlinuz-5.12.0-rc3-GIDI_DEV+
run-parts: executing /etc/kernel/postinst.d/dkms 5.12.0-rc3-GIDI_DEV+ /boot/vmlinuz-5.12.0-rc3-GIDI_DEV+
* dkms: running auto installation service for kernel 5.12.0-rc3-GIDI_DEV+ [ OK ]
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 5.12.0-rc3-GIDI_DEV+ /boot/vmlinuz-5.12.0-rc3-GIDI_DEV+
update-initramfs: Generating /boot/initrd.img-5.12.0-rc3-GIDI_DEV+
dpkg: warning: version '5.12.0-rc3-GIDI_DEV+' has bad syntax: invalid character in revision number
dpkg: warning: version '5.12.0-rc3-GIDI_DEV+' has bad syntax: invalid character in revision number
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_gpu_info.bin for module amdgpu
...
W: Possible missing firmware /lib/firmware/i915/dg1_dmc_ver2_02.bin for module i915
dpkg: warning: version '5.12.0-rc3-GIDI_DEV+' has bad syntax: invalid character in revision number
dpkg: warning: version '5.12.0-rc3-GIDI_DEV+' has bad syntax: invalid character in revision number
run-parts: executing /etc/kernel/postinst.d/pm-utils 5.12.0-rc3-GIDI_DEV+ /boot/vmlinuz-5.12.0-rc3-GIDI_DEV+
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 5.12.0-rc3-GIDI_DEV+ /boot/vmlinuz-5.12.0-rc3-GIDI_DEV+
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 ...
dpkg: warning: version '5.12.0~rc3-GIDI_DEV+~old' has bad syntax: invalid character in revision number
dpkg: warning: version '5.12.0~rc3-GIDI_DEV+' has bad syntax: invalid character in revision number
dpkg: warning: version '5.12.0~rc3-GIDI_DEV+' has bad syntax: invalid character in revision number
dpkg: warning: version '5.12.0~rc3-GIDI_DEV+' has bad syntax: invalid character in revision number
Found linux image: /boot/vmlinuz-5.12.0-rc3-GIDI_DEV+
Found initrd image: /boot/initrd.img-5.12.0-rc3-GIDI_DEV+
dpkg: warning: version '5.12.0~rc3-GIDI_DEV+~old' has bad syntax: invalid character in revision number
dpkg: warning: version '5.12.0~rc3-GIDI_DEV+~old' has bad syntax: invalid character in revision number
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
done
Thanks,
Gidi