diff --git a/tuned/plugins/plugin_cpu.py b/tuned/plugins/plugin_cpu.py
index 0d7bce64..6b701b84 100644
--- a/tuned/plugins/plugin_cpu.py
+++ b/tuned/plugins/plugin_cpu.py
@@ -582,7 +582,7 @@ def _set_sampling_down_factor(self, sampling_down_factor, device, instance, sim,
 			self._governors_map.clear()
 
 		self._governors_map[device] = None
-		governor = self._get_governor(device)
+		governor = self._get_governor(device, instance)
 		if governor is None:
 			log.debug("ignoring sampling_down_factor setting for CPU '%s', cannot match governor" % device)
 			return None
@@ -600,7 +600,7 @@ def _set_sampling_down_factor(self, sampling_down_factor, device, instance, sim,
 
 	@command_get("sampling_down_factor")
 	def _get_sampling_down_factor(self, device, instance, ignore_missing=False):
-		governor = self._get_governor(device, ignore_missing=ignore_missing)
+		governor = self._get_governor(device, instance, ignore_missing=ignore_missing)
 		if governor is None:
 			return None
 		path = self._sampling_down_factor_path(governor)
diff --git a/tuned/plugins/plugin_disk.py b/tuned/plugins/plugin_disk.py
index f4d94d92..207b964f 100644
--- a/tuned/plugins/plugin_disk.py
+++ b/tuned/plugins/plugin_disk.py
@@ -456,17 +456,17 @@ def _multiply_readahead(self, enabling, multiplier, device, verify, ignore_missi
 				command_name = "readahead_multiply",
 				device_name = device)
 		if enabling:
-			old_readahead = self._get_readahead(device)
+			old_readahead = self._get_readahead(device, instance)
 			if old_readahead is None:
 				return
 			new_readahead = int(float(multiplier) * old_readahead)
 			self._storage.set(storage_key, old_readahead)
-			self._set_readahead(new_readahead, device, False)
+			self._set_readahead(new_readahead, device, instance, False)
 		else:
 			old_readahead = self._storage.get(storage_key)
 			if old_readahead is None:
 				return
-			self._set_readahead(old_readahead, device, False)
+			self._set_readahead(old_readahead, device, instance, False)
 			self._storage.unset(storage_key)
 
 	def _scheduler_quantum_file(self, device):
diff --git a/tuned/plugins/plugin_scheduler.py b/tuned/plugins/plugin_scheduler.py
index 24666e48..9f3489aa 100644
--- a/tuned/plugins/plugin_scheduler.py
+++ b/tuned/plugins/plugin_scheduler.py
@@ -1510,11 +1510,11 @@ def _set_sched_min_granularity_ns(self, value, instance, sim, remove):
 
 	@command_get("sched_base_slice_ns")
 	def _get_sched_base_slice_ns(self, instance):
-		return self._get_sched_min_granularity_ns()
+		return self._get_sched_min_granularity_ns(instance)
 
 	@command_set("sched_base_slice_ns")
 	def _set_sched_base_slice_ns(self, value, instance, sim, remove):
-		return self._set_sched_min_granularity_ns(value, sim, remove)
+		return self._set_sched_min_granularity_ns(value, instance, sim, remove)
 
 	@command_get("sched_latency_ns")
 	def _get_sched_latency_ns(self, instance):
diff --git a/tuned/plugins/plugin_video.py b/tuned/plugins/plugin_video.py
index b71097a0..2122539b 100644
--- a/tuned/plugins/plugin_video.py
+++ b/tuned/plugins/plugin_video.py
@@ -85,7 +85,7 @@ def _files(self, device):
 			"panel_power_savings": "/sys/class/drm/%s/amdgpu/panel_power_savings" % device,
 		}
 
-	def apply_panel_power_saving_target(self, device, target, sim=False):
+	def apply_panel_power_saving_target(self, device, target, instance, sim=False):
 		"""Apply the target value to the panel_power_savings file if it doesn't already have it"""
 
 		# if we don't have the file, we might be radeon not amdgpu
@@ -93,7 +93,7 @@ def apply_panel_power_saving_target(self, device, target, sim=False):
 			return None
 
 		# make sure the value is different (avoids unnecessary kernel modeset)
-		current = int(self._get_panel_power_savings(device))
+		current = int(self._get_panel_power_savings(device, instance))
 		if current == target:
 			log.info(
 				"panel_power_savings for %s already %s" % (device, target)
@@ -167,7 +167,7 @@ def _set_panel_power_savings(self, value, device, instance, sim, remove):
 			log.warning("Invalid value %s for panel_power_savings" % value)
 			return None
 		if value in range(0, 5):
-			return self.apply_panel_power_saving_target(device, value, sim)
+			return self.apply_panel_power_saving_target(device, value, instance, sim)
 		else:
 			log.warning("Invalid value %s for panel_power_savings" % value)
 		return None
diff --git a/tuned/plugins/plugin_vm.py b/tuned/plugins/plugin_vm.py
index c4b50f3e..8e4beaea 100644
--- a/tuned/plugins/plugin_vm.py
+++ b/tuned/plugins/plugin_vm.py
@@ -103,7 +103,7 @@ def _set_transparent_hugepages(self, value, instance, sim, remove):
         # just an alias to transparent_hugepages
 	@command_set("transparent_hugepage")
 	def _set_transparent_hugepage(self, value, instance, sim, remove):
-		self._set_transparent_hugepages(value, sim, remove)
+		self._set_transparent_hugepages(value, instance, sim, remove)
 
 	@command_get("transparent_hugepages")
 	def _get_transparent_hugepages(self, instance):
@@ -116,7 +116,7 @@ def _get_transparent_hugepages(self, instance):
         # just an alias to transparent_hugepages
 	@command_get("transparent_hugepage")
 	def _get_transparent_hugepage(self, instance):
-		return self._get_transparent_hugepages()
+		return self._get_transparent_hugepages(instance)
 
 	@command_set("transparent_hugepage.defrag")
 	def _set_transparent_hugepage_defrag(self, value, instance, sim, remove):