40.5 Kadesh Kernels


Kadesh is a Dell Latitude 7440 Desktop. See Section 40.2 for details.

Here we review updating to the latest released kernel. These are not necessarily yet supported for Ubuntu though they do come from a Ubuntu repository: https://kernel.ubuntu.com/mainline/. The aim has been to get the camera working through updated kernel support.

The mainline package provides an interactive GUI to manage installed kernels.

mainline list

The current kernel was 6.5.0-14.14, an official Ubuntu kernel. Through mainline select 6.7 and then Install.

mainline install 6.7
mainline 1.4.9
install 6.7 
Downloading 6.7                                                       
Installing 6.7                                                        
Selecting previously unselected package linux-image-unsigned-6.7.0-060700-generic.
(Reading database ... 740392 files and directories currently installed.)
Preparing to unpack .../linux-image-unsigned-6.7.0-060700-generic_6.7.0-060700.202401072033_amd64.deb ...
Unpacking linux-image-unsigned-6.7.0-060700-generic (6.7.0-060700.202401072033) ...
Selecting previously unselected package linux-modules-6.7.0-060700-generic.
Preparing to unpack .../linux-modules-6.7.0-060700-generic_6.7.0-060700.202401072033_amd64.deb ...
Unpacking linux-modules-6.7.0-060700-generic (6.7.0-060700.202401072033) ...
Selecting previously unselected package linux-headers-6.7.0-060700-generic.
Preparing to unpack .../linux-headers-6.7.0-060700-generic_6.7.0-060700.202401072033_amd64.deb ...
Unpacking linux-headers-6.7.0-060700-generic (6.7.0-060700.202401072033) ...
Selecting previously unselected package linux-headers-6.7.0-060700.
Preparing to unpack .../linux-headers-6.7.0-060700_6.7.0-060700.202401072033_all.deb ...
Unpacking linux-headers-6.7.0-060700 (6.7.0-060700.202401072033) ...
Setting up linux-modules-6.7.0-060700-generic (6.7.0-060700.202401072033) ...
Setting up linux-headers-6.7.0-060700 (6.7.0-060700.202401072033) ...
Setting up linux-image-unsigned-6.7.0-060700-generic (6.7.0-060700.202401072033) ...
I: /boot/vmlinuz.old is now a symlink to vmlinuz-6.5.0-14-generic
I: /boot/initrd.img.old is now a symlink to initrd.img-6.5.0-14-generic
I: /boot/vmlinuz is now a symlink to vmlinuz-6.7.0-060700-generic
I: /boot/initrd.img is now a symlink to initrd.img-6.7.0-060700-generic
Setting up linux-headers-6.7.0-060700-generic (6.7.0-060700.202401072033) ...
Processing triggers for linux-image-unsigned-6.7.0-060700-generic (6.7.0-060700.202401072033) ...
update-initramfs: Generating /boot/initrd.img-6.7.0-060700-generic
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.7.0-060700-generic
Found initrd image: /boot/initrd.img-6.7.0-060700-generic
Found linux image: /boot/vmlinuz-6.5.0-14-generic
Found initrd image: /boot/initrd.img-6.5.0-14-generic
Found linux image: /boot/vmlinuz-6.5.0-13-generic
Found initrd image: /boot/initrd.img-6.5.0-13-generic
Found memtest86+ 64bit EFI image: /memtest86+x64.efi
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu entry for UEFI Firmware Settings ...
mainline: done

This did not fix my missing camera! But I had a new kernel!

On 20240514 I updated to the latest kernel:

mainline install 6.9

But it complained about not being able to install libelf1t64 (>= 0.144) and libssl3t64 (>= 3.0.0) required by linux-headers-6.9.0-060900-generic. A reboot failed initially. Going back to 6.7 also failed (stopped at the boot screen wit the logo and all dots filled, making no progress). Booted into 6.5 okay and dit a sudo apt --fix-broken install and that fixed the bad state of the pacakges. A boot back into 6.9 was okay. Though I lost my USB mouse/keyboard a couple of times.

Currently stay with 6.9 and a working external USB camera.

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