Use ACPI alarm for RTC wakeup on s2idle systems for hibernation

Just commit to always going from suspend to hibernate on the specified
delay

bin/omarchy-hibernation-setup

@@ -66,6 +66,16 @@ sudo cp "$OMARCHY_PATH/default/systemd/lid.conf" /etc/systemd/logind.conf.d/
 sudo cp "$OMARCHY_PATH/default/systemd/hibernate.conf" /etc/systemd/sleep.conf.d/
 sudo cp -p "$OMARCHY_PATH/default/systemd/system-sleep/keyboard-backlight" /usr/lib/systemd/system-sleep/
 
+# Use ACPI alarm for RTC wakeup on s2idle systems (needed for suspend-then-hibernate)
+if grep -q "\[s2idle\]" /sys/power/mem_sleep 2>/dev/null; then
+  LIMINE_DROP_IN="/etc/limine-entry-tool.d/rtc-alarm.conf"
+  if [[ ! -f "$LIMINE_DROP_IN" ]]; then
+    echo "Enabling ACPI RTC alarm for s2idle suspend"
+    sudo mkdir -p /etc/limine-entry-tool.d
+    echo 'KERNEL_CMDLINE[default]+="rtc_cmos.use_acpi_alarm=1"' | sudo tee "$LIMINE_DROP_IN" >/dev/null
+  fi
+fi
+
 # Regenerate initramfs
 echo "Regenerating initramfs..."
 sudo limine-mkinitcpio

default/bashrc

@@ -9,4 +9,4 @@ source ~/.local/share/omarchy/default/bash/rc
 #
 # Make an alias for invoking commands you use constantly
 # alias p='python'
-# alias cc="claude --permission-mode=plan --allow-dangerously-skip-permissions"
+# alias cx="claude --permission-mode=plan --allow-dangerously-skip-permissions"

default/systemd/hibernate.conf

@@ -1,3 +1,3 @@
 [Sleep]
 HibernateDelaySec=90min
-HibernateOnACPower=no
+SuspendEstimationSec=0