/etc/update-manager/release-upgrades の最後の行を Prompt=normal にします。
sudo vim /etc/update-manager/release-upgrades# Default behavior for the release upgrader.
[DEFAULT]
# Default prompting and upgrade behavior, valid options:
#
# never - Never check for, or allow upgrading to, a new release.
# normal - Check to see if a new release is available. If more than one new
# release is found, the release upgrader will attempt to upgrade to
# the supported release that immediately succeeds the
# currently-running release.
# lts - Check to see if a new LTS release is available. The upgrader
# will attempt to upgrade to the first LTS release available after
# the currently-running one. Note that if this option is used and
# the currently-running release is not itself an LTS release the
# upgrader will assume prompt was meant to be normal.
Prompt=normal
Code language: plaintext (plaintext)通常のアップデートをして、再起動します。
sudo apt update
sudo apt upgrade
sudo rebootCode language: Bash (bash)2023.10 へアップグレードします
sudo do-release-upgradeCode language: Bash (bash)途中、何回か y を押します。
再起動すると、無事、起動しました！
