Add RGB lighting persistence, software LED power management, and grab-immune input monitoring for G515/G502

Implements software LED idle/wake management when Solaar claims SW control of
RGB effects, replacing firmware power management that gets disabled. Adds
dual-channel activity monitoring via evdev and hidraw (immune to EVIOCGRAB)
so LEDs stay lit during gaming. Handles device online/offline transitions
to avoid conflicts when switching between wired and wireless connections.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ksanislo

docs/devices/G502 X PLUS 4099.txt

@@ -0,0 +1,70 @@
+Solaar version 1.1.19
+
+  2: G502 X PLUS
+     Device path  : None
+     WPID         : 4099
+     Codename     : G502 X PLUS
+     Kind         : mouse
+     Protocol     : HID++ 4.2
+     Report Rate : 1ms
+     Serial number:
+     Model ID:      4099C0950000
+     Unit ID:
+       Bootloader: BL1 42.00.B0016
+         Firmware: MPM 27.00.B0016
+     The power switch is located on the unknown.
+     Supports 32 HID++ 2.0 features:
+         0: ROOT                   {0000} V0
+         1: FEATURE SET            {0001} V0
+         2: DEVICE FW VERSION      {0003} V4
+            Firmware: Bootloader BL1 42.00.B0016
+            Firmware: Firmware MPM 27.00.B0016
+            Unit ID:   Model ID: 4099C0950000  Transport IDs: {'wpid': '4099', 'usbid': 'C095'}
+         3: DEVICE NAME            {0005} V0
+            Name: G502 X PLUS
+            Kind: mouse
+         4: WIRELESS DEVICE STATUS {1D4B} V0
+         5: CONFIG CHANGE          {0020} V0
+         6: UNIFIED BATTERY        {1004} V3
+         7: ADJUSTABLE DPI         {2201} V2
+            Sensitivity (DPI) (saved): 1600
+         8: HIRES WHEEL            {2121} V0
+            Multiplier: 8
+            Has invert: Normal wheel motion
+            Has ratchet switch: Normal wheel mode
+            Low resolution mode
+            HID notification
+            Scroll Wheel Direction (saved): False
+            Scroll Wheel Resolution (saved): False
+            Scroll Wheel Diversion (saved): False
+         9: RGB EFFECTS            {8071} V2
+            LED Control (saved): Solaar
+            LED Idle Timeout (saved): 1 Minute
+            LEDs Primary (saved): !LEDEffectSetting {ID: 1, color: 2531945, intensity: 0, period: 100, ramp: 0, speed: 0}
+        10: PER KEY LIGHTING V2    {8081} V2
+            Per-key Lighting (saved): {A:No change, B:No change, C:No change, D:No change, E:No change, F:No change, G:No change, H:No change}
+        11: ONBOARD PROFILES       {8100} V0
+            Device Mode: On-Board
+            Onboard Profiles (saved): Disabled
+        12: MOUSE BUTTON SPY       {8110} V0
+        13: REPORT RATE            {8060} V0
+            Report Rate (saved): 1ms
+        14: FORCE PAIRING          {1500} V0
+        15: DFU                    {00D0} V3
+        16: DEVICE RESET           {1802} V0
+        17: unknown:1803           {0318} V0    internal, hidden, unknown:000010
+        18: CONFIG DEVICE PROPS    {1806} V8
+        19: unknown:1811           {1118} V0    internal, hidden, unknown:000010
+        20: OOBSTATE               {1805} V0
+        21: unknown:1830           {3018} V0    internal, hidden, unknown:000010
+        22: unknown:1875           {7518} V0    internal, hidden, unknown:000010
+        23: unknown:1861           {6118} V0    internal, hidden, unknown:000010
+        24: unknown:1890           {9018} V0    internal, hidden, unknown:000008
+        25: unknown:18A1           {A118} V0    internal, hidden, unknown:000010
+        26: unknown:1801           {0118} V0    internal, hidden, unknown:000010
+        27: unknown:1E00           {001E} V0    hidden
+        28: unknown:1E22           {221E} V0    internal, hidden, unknown:000010
+        29: unknown:1EB0           {B01E} V0    internal, hidden, unknown:000010
+        30: unknown:18B1           {B118} V0    internal, hidden, unknown:000010
+        31: unknown:18C0           {C018} V0    internal, hidden, unknown:000010
+     Battery status unavailable.

lib/logitech_receiver/hidpp20_constants.py

@@ -140,6 +140,7 @@ class SupportedFeature(IntEnum):
     PER_KEY_LIGHTING_V2 = 0x8081
     MODE_STATUS = 0x8090
     ONBOARD_PROFILES = 0x8100
+    PROFILE_MANAGEMENT = 0x8101
     MOUSE_BUTTON_SPY = 0x8110
     LATENCY_MONITORING = 0x8111
     GAMING_ATTACHMENTS = 0x8120

lib/logitech_receiver/notifications.py

@@ -419,6 +419,10 @@ def _process_feature_notification(device: Device, notification: HIDPPNotificatio
                     brightness = struct.unpack("!H", device.feature_request(SupportedFeature.BRIGHTNESS_CONTROL, 0x10)[:2])[0]
                 device.setting_callback(device, settings_templates.BrightnessControl, [brightness])
 
+    elif feature == SupportedFeature.RGB_EFFECTS:
+        if logger.isEnabledFor(logging.DEBUG):
+            logger.debug("%s: RGB_EFFECTS notification addr=%02x: %s", device, notification.address, notification)
+
     diversion.process_notification(device, notification, feature)
     return True