diff --git a/local/recipes/system/redbear-quirks/source/quirks.d/50-system.toml b/local/recipes/system/redbear-quirks/source/quirks.d/50-system.toml
index 7189498469..2b3a2ba5cf 100644
--- a/local/recipes/system/redbear-quirks/source/quirks.d/50-system.toml
+++ b/local/recipes/system/redbear-quirks/source/quirks.d/50-system.toml
@@ -49,3 +49,18 @@ match.board_name = "X570 AORUS MASTER"
 # signature = "DMAR"
 # match.sys_vendor = "Example Vendor"
 # match.product_name = "Example Model"
+
+# LG Gram 16 (2025) / Intel Arrow Lake-H. Modern Standby (S0ix) is
+# preferred over S3. Disable legacy ACPI S5 reset path that conflicts
+# with the LG firmware's Modern Standby implementation.
+[[dmi_system_quirk]]
+flags = ["force_s2idle"]
+match.sys_vendor = "LG Electronics"
+match.product_name = "16Z90TR"
+
+# LG Gram 16T90SP (2026 Panther Lake). Same modern-standby
+# preference; same S0ix SLP hint handling.
+[[dmi_system_quirk]]
+flags = ["force_s2idle"]
+match.sys_vendor = "LG Electronics"
+match.product_name = "16T90SP"