I noticed that the option NO_DRACUT_FALLBACK=“true” in /etc/kernel-install-for-dracut.conf is no longer working. I am now getting fallback entries again:
As you can see, the kernel 6.1.49-273.1-tkg-cfs does not have a fallback entry because I installed it in the morning of 28. August. The kernels I installed starting the 29. August all have fallback entries.
And just to be sure that NO_DRACUT_FALLBACK is set properly:
╰─# cat /etc/kernel-install-for-dracut.conf
# This config file controls the automation provided by kernel-install-for-dracut
# When DRACUT_QUIET is set to true, dracut will operate with quiet flag set suppressing most output
#DRACUT_QUIET="false"
# When NO_FALLBACK is set to true, no fallback initrd will be generated
NO_DRACUT_FALLBACK="true"
And the point is: Dracut is actually not creating a fallback initrd. But a *fallback.conf file for systemd is created.
╰─# cat /usr/lib/kernel/install.d/90-loaderentry-fallback.install
#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
# SPDX-License-Identifier: LGPL-2.1-or-later
#
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# systemd is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with systemd; If not, see <https://www.gnu.org/licenses/>.
set -e
COMMAND="${1:?}"
KERNEL_VERSION="${2:?}"
ENTRY_DIR_ABS="${3:?}"
KERNEL_IMAGE="$4"
INITRD_OPTIONS_SHIFT=4
[ "$KERNEL_INSTALL_LAYOUT" = "bls" ] || exit 0
MACHINE_ID="${KERNEL_INSTALL_MACHINE_ID:?}"
ENTRY_TOKEN="${KERNEL_INSTALL_ENTRY_TOKEN:?}"
BOOT_ROOT="${KERNEL_INSTALL_BOOT_ROOT:?}"
[ -n "$BOOT_MNT" ] || BOOT_MNT="$(stat -c %m "$BOOT_ROOT")"
if [ "$BOOT_MNT" = '/' ]; then
ENTRY_DIR="$ENTRY_DIR_ABS"
else
ENTRY_DIR="${ENTRY_DIR_ABS#"$BOOT_MNT"}"
fi
KERNEL_DEST="$ENTRY_DIR_ABS/linux"
KERNEL_ENTRY="$ENTRY_DIR/linux"
LOADER_ENTRY="$BOOT_ROOT/loader/entries/${ENTRY_TOKEN}-${KERNEL_VERSION}-fallback.conf"
case "$COMMAND" in
remove)
[ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
echo "Removing ${LOADER_ENTRY%.conf}*.conf"
exec rm -f \
"$LOADER_ENTRY" \
"${LOADER_ENTRY%.conf}"*".conf"
;;
add)
;;
*)
exit 0
;;
esac
if [ -f /etc/os-release ]; then
# shellcheck source=/dev/null
. /etc/os-release
elif [ -f /usr/lib/os-release ]; then
# shellcheck source=/dev/null
. /usr/lib/os-release
fi
[ -n "$PRETTY_NAME" ] || PRETTY_NAME="Linux $KERNEL_VERSION"
SORT_KEY="$IMAGE_ID"
[ -z "$SORT_KEY" ] && SORT_KEY="$ID-${KERNEL_VERSION}-fallback"
if [ -n "$KERNEL_INSTALL_CONF_ROOT" ]; then
if [ -f "$KERNEL_INSTALL_CONF_ROOT/cmdline" ]; then
BOOT_OPTIONS="$(tr -s "$IFS" ' ' <"$KERNEL_INSTALL_CONF_ROOT/cmdline")"
fi
elif [ -r /etc/kernel/cmdline_fb ]; then
BOOT_OPTIONS="$(tr -s "$IFS" ' ' </etc/kernel/cmdline_fb)"
elif [ -f /etc/kernel/cmdline ]; then
BOOT_OPTIONS="$(tr -s "$IFS" ' ' </etc/kernel/cmdline)"
elif [ -f /usr/lib/kernel/cmdline ]; then
BOOT_OPTIONS="$(tr -s "$IFS" ' ' </usr/lib/kernel/cmdline)"
else
BOOT_OPTIONS="$(tr -s "$IFS" '\n' </proc/cmdline | grep -ve '^BOOT_IMAGE=' -e '^initrd=' | tr '\n' ' ')"
fi
BOOT_OPTIONS="${BOOT_OPTIONS% }"
# If the boot entries are named after the machine ID, then suffix the kernel
# command line with the machine ID we use, so that the machine ID remains
# stable, even during factory reset, in the initrd (where the system's machine
# ID is not directly accessible yet), and if the root file system is volatile.
if [ "$ENTRY_TOKEN" = "$MACHINE_ID" ] && ! echo "$BOOT_OPTIONS" | grep -q "systemd.machine_id="; then
BOOT_OPTIONS="$BOOT_OPTIONS systemd.machine_id=$MACHINE_ID"
fi
TRIES_FILE="${KERNEL_INSTALL_CONF_ROOT:-/etc/kernel}/tries"
if [ -f "$TRIES_FILE" ]; then
read -r TRIES <"$TRIES_FILE"
if ! echo "$TRIES" | grep -q '^[0-9][0-9]*$'; then
echo "$TRIES_FILE does not contain an integer." >&2
exit 1
fi
LOADER_ENTRY="${LOADER_ENTRY%.conf}+$TRIES.conf"
fi
if ! [ -d "$ENTRY_DIR_ABS" ]; then
echo "Error: entry directory '$ENTRY_DIR_ABS' does not exist" >&2
exit 1
fi
install -m 0644 "$KERNEL_IMAGE" "$KERNEL_DEST" || {
echo "Error: could not copy '$KERNEL_IMAGE' to '$KERNEL_DEST'." >&2
exit 1
}
chown root:root "$KERNEL_DEST" || :
shift "$INITRD_OPTIONS_SHIFT"
# All files listed as arguments, and staged files starting with "initrd" are installed as initrds.
for initrd in "${KERNEL_INSTALL_STAGING_AREA}"/microcode* "${@}" "${KERNEL_INSTALL_STAGING_AREA}"/initrd*; do
[ -f "$initrd" ] || {
case "$initrd" in
"${KERNEL_INSTALL_STAGING_AREA}/initrd*" | "${KERNEL_INSTALL_STAGING_AREA}/microcode*")
continue ;;
esac
echo "Error: '$initrd' is not a file." >&2
exit 1
}
initrd_basename="${initrd##*/}"
[ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && echo "Installing $ENTRY_DIR_ABS/$initrd_basename"
install -m 0644 "$initrd" "$ENTRY_DIR_ABS/$initrd_basename" || {
echo "Error: could not copy '$initrd' to '$ENTRY_DIR_ABS/$initrd_basename'." >&2
exit 1
}
chown root:root "$ENTRY_DIR_ABS/$initrd_basename" || :
done
mkdir -p "${LOADER_ENTRY%/*}" || {
echo "Error: could not create loader entry directory '${LOADER_ENTRY%/*}'." >&2
exit 1
}
[ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && echo "Creating $LOADER_ENTRY"
{
echo "# Boot Loader Specification type#1 entry"
echo "# File created by $0 (systemd 254.1-1-arch)"
echo "title $PRETTY_NAME"
echo "version ${KERNEL_VERSION}-fallback"
if [ "$ENTRY_TOKEN" = "$MACHINE_ID" ]; then
# See similar logic above for the systemd.machine_id= kernel command line option
echo "machine-id $MACHINE_ID"
fi
[ -n "$SORT_KEY" ] && echo "sort-key $SORT_KEY"
echo "options $BOOT_OPTIONS"
echo "linux $KERNEL_ENTRY"
have_initrd=
for initrd in "${KERNEL_INSTALL_STAGING_AREA}"/microcode* "${@}" "${KERNEL_INSTALL_STAGING_AREA}"/initrd* "${ENTRY_DIR_ABS}/initrd-fallback"; do
[ -f "$initrd" ] || continue
echo "initrd $ENTRY_DIR/${initrd##*/}"
have_initrd=yes
done
# Try "initrd", generated by dracut in its kernel-install hook, if no initrds were supplied
[ -z "$have_initrd" ] && [ -f "$ENTRY_DIR_ABS/initrd-fallback" ] && echo "initrd $ENTRY_DIR/initrd-fallback"
:
} >"$LOADER_ENTRY" || {
echo "Error: could not create loader entry '$LOADER_ENTRY'." >&2
exit 1
}
exit 0
╰─# ls /etc/kernel/install.d
50-dracut.install 90-loaderentry.install
Or you could just wait for the next regular kernel update. That will remove the old and install the new kernel and fix the problem for you automatically. The *.fallback.conf files are only a cosmetic issue. They do not use much space and are harmless. You can just let them be until they vanish automatically.
