Fix hibernation on btrfs swapfiles with dm-crypt (systemd 256+)

bin/omarchy-hibernation-remove

@@ -48,6 +48,8 @@ fi
 echo "Removing suspend-then-hibernate configuration"
 sudo rm -f /etc/systemd/logind.conf.d/lid.conf
 sudo rm -f /etc/systemd/sleep.conf.d/hibernate.conf
+sudo rm -f /etc/systemd/system/systemd-logind.service.d/hibernate.conf
+sudo rm -f /etc/systemd/system/systemd-hibernate.service.d/bypass.conf
 
 # Remove mkinitcpio resume hook
 echo "Removing resume hook"

bin/omarchy-hibernation-setup

@@ -90,20 +90,42 @@ echo "HOOKS+=(resume)" | sudo tee "$MKINITCPIO_CONF" >/dev/null
 # Ensure keyboard backlight doesn't prevent sleep
 sudo cp -p "$OMARCHY_PATH/default/systemd/system-sleep/keyboard-backlight" /usr/lib/systemd/system-sleep/
 
+# Resolve resume device and offset
+sudo swapon -p 0 "$SWAP_FILE" 2>/dev/null
+RESUME_DEVICE=$(findmnt -no SOURCE -T "$SWAP_FILE" | sed 's/\[.*\]//')
+RESUME_OFFSET=$(sudo btrfs inspect-internal map-swapfile -r "$SWAP_FILE")
+
 # Add resume= kernel parameters so the initramfs resume hook knows where to find the
 # hibernation image. Without these, resume happens late (after GPU drivers load) and fails.
 if [[ ! -f $RESUME_DROP_IN ]]; then
   echo "Adding resume kernel parameters"
-  sudo swapon -p 0 "$SWAP_FILE" 2>/dev/null
-  RESUME_DEVICE=$(findmnt -no SOURCE -T "$SWAP_FILE" | sed 's/\[.*\]//')
-  RESUME_OFFSET=$(sudo btrfs inspect-internal map-swapfile -r "$SWAP_FILE")
   if [[ -n $RESUME_OFFSET ]]; then
     sudo mkdir -p /etc/limine-entry-tool.d
     echo "KERNEL_CMDLINE[default]+=\" resume=$RESUME_DEVICE resume_offset=$RESUME_OFFSET\"" | sudo tee "$RESUME_DROP_IN" >/dev/null
     sudo tee -a /etc/default/limine < "$RESUME_DROP_IN" >/dev/null
   else
     echo "Warning: Could not determine resume offset for $SWAP_FILE" >&2
   fi
+elif [[ -n $RESUME_OFFSET ]] && ! grep -q "resume_offset=$RESUME_OFFSET" "$RESUME_DROP_IN"; then
+  echo "Updating stale resume_offset in $RESUME_DROP_IN"
+  sudo sed -i "s/resume_offset=[0-9]*/resume_offset=$RESUME_OFFSET/" "$RESUME_DROP_IN"
+  sudo sed -i "s/resume_offset=[0-9]*/resume_offset=$RESUME_OFFSET/" /etc/default/limine
+fi
+
+# Work around systemd not being able to resolve btrfs swapfiles on dm-crypt
+# as valid hibernation devices (see https://github.com/systemd/systemd/issues/30083)
+LOGIND_DROP_IN="/etc/systemd/system/systemd-logind.service.d/hibernate.conf"
+if [[ ! -f $LOGIND_DROP_IN ]]; then
+  echo "Adding systemd-logind hibernation bypass"
+  sudo mkdir -p /etc/systemd/system/systemd-logind.service.d
+  printf '[Service]\nEnvironment="SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK=1"\n' | sudo tee "$LOGIND_DROP_IN" >/dev/null
+fi
+
+HIBERNATE_DROP_IN="/etc/systemd/system/systemd-hibernate.service.d/bypass.conf"
+if [[ ! -f $HIBERNATE_DROP_IN ]]; then
+  echo "Adding systemd-hibernate bypass"
+  sudo mkdir -p /etc/systemd/system/systemd-hibernate.service.d
+  printf '[Service]\nEnvironment="SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK=1"\n' | sudo tee "$HIBERNATE_DROP_IN" >/dev/null
 fi
 
 # Use ACPI alarm for RTC wakeup on s2idle systems (needed for suspend-then-hibernate)

migrations/1778497305.sh

@@ -0,0 +1,34 @@
+echo "Fix hibernation on btrfs swapfiles with dm-crypt (systemd 256+)"
+
+MKINITCPIO_CONF="/etc/mkinitcpio.conf.d/omarchy_resume.conf"
+SWAP_FILE="/swap/swapfile"
+RESUME_DROP_IN="/etc/limine-entry-tool.d/resume.conf"
+
+# Only apply if hibernation is configured
+if [[ ! -f $MKINITCPIO_CONF ]] || ! grep -q "^HOOKS+=(resume)$" "$MKINITCPIO_CONF"; then
+  exit 0
+fi
+
+# Add systemd bypass drop-ins for btrfs swapfile on dm-crypt
+# (see https://github.com/systemd/systemd/issues/30083)
+LOGIND_DROP_IN="/etc/systemd/system/systemd-logind.service.d/hibernate.conf"
+if [[ ! -f $LOGIND_DROP_IN ]]; then
+  sudo mkdir -p /etc/systemd/system/systemd-logind.service.d
+  printf '[Service]\nEnvironment="SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK=1"\n' | sudo tee "$LOGIND_DROP_IN" >/dev/null
+fi
+
+HIBERNATE_DROP_IN="/etc/systemd/system/systemd-hibernate.service.d/bypass.conf"
+if [[ ! -f $HIBERNATE_DROP_IN ]]; then
+  sudo mkdir -p /etc/systemd/system/systemd-hibernate.service.d
+  printf '[Service]\nEnvironment="SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK=1"\n' | sudo tee "$HIBERNATE_DROP_IN" >/dev/null
+fi
+
+# Fix stale resume_offset if swapfile was recreated at a different physical location
+if [[ -f $RESUME_DROP_IN ]] && [[ -f $SWAP_FILE ]]; then
+  RESUME_OFFSET=$(sudo btrfs inspect-internal map-swapfile -r "$SWAP_FILE" 2>/dev/null)
+  if [[ -n $RESUME_OFFSET ]] && ! grep -q "resume_offset=$RESUME_OFFSET" "$RESUME_DROP_IN"; then
+    sudo sed -i "s/resume_offset=[0-9]*/resume_offset=$RESUME_OFFSET/" "$RESUME_DROP_IN"
+    sudo sed -i "s/resume_offset=[0-9]*/resume_offset=$RESUME_OFFSET/" /etc/default/limine
+    sudo limine-mkinitcpio
+  fi
+fi