Switch the Pocket EVO to real suspend to RAM

README.md

@@ -176,10 +176,15 @@ desktop. The **Bazaar** app store and the **Armada Installer**
 
 ### Power button and sleep
 
-Pressing the power button does a "fake suspend" (inspired by ROCKNIX) rather than
-real S3 sleep: it blanks the screen and freezes the session, and the same press
-wakes it. Because the device does not truly sleep, idle battery drain is higher
-than it would be with real suspend.
+What the power button does depends on the device.
+
+On the **AYN Odin 3** and **AYANEO Pocket EVO** it is a real suspend to RAM: the
+device genuinely powers down and the same press wakes it. Standby drain is much
+lower — measured at roughly a fifth of fake suspend on the Pocket EVO.
+
+Everywhere else it is a "fake suspend" (inspired by ROCKNIX): the screen blanks
+and the session freezes, but the device stays powered, so idle battery drain is
+higher than it would be with real suspend.
 
 ## Updating
 

system_files/usr/lib/armada/devices/ayaneo-pocket-evo.conf

@@ -9,3 +9,7 @@ ARMADA_PANEL_NATIVE_HEIGHT=1920
 ARMADA_PANEL_REFRESH_RATES=60,120
 ARMADA_GAMESCOPE_USE_ROTATION_SHADER=1
 ARMADA_GAMEPAD_QUIRK=ayaneo-xbox
+# Requires the SM8550 suspend patches and the fan tacho DTS override from
+# armada-packages. Without them this device wakes itself within seconds and
+# hard-hangs on resume with a Steam session running.
+ARMADA_SUSPEND_MODE=mem

system_files/usr/lib/systemd/sleep.conf.d/10-armada-suspend-state.conf

@@ -0,0 +1,6 @@
+[Sleep]
+# Only try suspend-to-RAM. systemd's default is "mem standby freeze", so a
+# failed deep suspend falls through to s2idle -- which has been observed to
+# wedge SM8550 devices hard enough to need a power-button reset. A failed deep
+# should no-op instead. Matches what ROCKNIX pins for the same SoC.
+SuspendState=mem