Howto/20250203 Upgrade Ubuntu 22.04 to 24.04 on a dual boot computer with Windows 11

The upgrade process did not go smoothly as hoped, but here are the problems I had and the workarounds that worked for me:

Problem #1: do-release-upgrade fails due to thunderbird

Remove thunderbird:

sudo apt-get purge thunderbird*

Problem #2: Ubuntu boots to initramfs screen with error message about device not existing

Source: https://askubuntu.com/questions/1533516/ubuntu-24-04-dual-boot-win11-initramfs-error

1) Boot to Ubuntu Live USB

2) Mount root partition

       sudo mount /dev/sdb5 /mnt (mine was: sudo mount /dev/nvme0n1p2 /mnt)
       sudo mount --bind /dev /mnt/dev
       sudo mount --bind /proc /mnt/proc
       sudo mount --bind /sys /mnt/sys
       sudo chroot /mnt

3) Add following lines to /etc/initramfs-tools/modules

ufshcd_core
ufshcd_pci

4) Rebuild initramfs

 update-initramfs -u -k all 

5) Exit initramfs and rebooot

Problem #3: Ubuntu does not boot to desktop, but boots to console and network device is disabled

1) Enable network device and test internet connection

sudo dhcpcd
ping 8.8.8.8

2) Set nameserver in /etc/resolv.conf

nameserver 8.8.8.8

3) Re-install Ubuntu desktop and video drivers

sudo apt update
sudo apt dist-upgrade
sudo apt auto-remove
sudo apt install --reinstall ubuntu-desktop nvidia-driver-470

Good luck!