diff --git a/src/mainboard/system76/tgl-u/variants/darp7/overridetree.cb b/src/mainboard/system76/tgl-u/variants/darp7/overridetree.cb
index 7cf68f64e79..547fb154172 100644
--- a/src/mainboard/system76/tgl-u/variants/darp7/overridetree.cb
+++ b/src/mainboard/system76/tgl-u/variants/darp7/overridetree.cb
@@ -124,7 +124,8 @@ chip soc/intel/tigerlake
 		device ref sata on
 			# SATA1 (SSD0)
 			register "SataPortsEnable[1]" = "1"
-			register "SataPortsDevSlp[1]" = "1"
+			# FIXME: DevSlp breaks S0ix
+			#register "SataPortsDevSlp[1]" = "1"
 			register "SataPortsEnableDitoConfig[1]" = "1"
 			register "SataSalpSupport" = "1"
 		end
diff --git a/src/mainboard/system76/tgl-u/variants/lemp10/overridetree.cb b/src/mainboard/system76/tgl-u/variants/lemp10/overridetree.cb
index f2f7fcfbf76..da9d0fcce31 100644
--- a/src/mainboard/system76/tgl-u/variants/lemp10/overridetree.cb
+++ b/src/mainboard/system76/tgl-u/variants/lemp10/overridetree.cb
@@ -104,7 +104,8 @@ chip soc/intel/tigerlake
 		device ref sata on
 			# SATA1 (SSD2)
 			register "SataPortsEnable[1]" = "1"
-			register "SataPortsDevSlp[1]" = "1"
+			# FIXME: DevSlp breaks S0ix
+			#register "SataPortsDevSlp[1]" = "1"
 			register "SataPortsEnableDitoConfig[1]" = "1"
 			register "SataSalpSupport" = "1"
 		end