diff --git a/pkg/compute/models/guest_actions.go b/pkg/compute/models/guest_actions.go
index 2ca24c78db..e347a23555 100644
--- a/pkg/compute/models/guest_actions.go
+++ b/pkg/compute/models/guest_actions.go
@@ -1587,7 +1587,9 @@ func (self *SGuest) PerformDetachIsolatedDevice(ctx context.Context, userCred mc
 			return nil, httperrors.NewBadRequestError(msg)
 		}
 		err = self.startDetachIsolateDevice(ctx, userCred, device)
-		return nil, err
+		if err != nil {
+			return nil, err
+		}
 	} else {
 		devs := self.GetIsolatedDevices()
 		host := self.GetHost()
@@ -1599,8 +1601,11 @@ func (self *SGuest) PerformDetachIsolatedDevice(ctx context.Context, userCred mc
 				return nil, err
 			}
 		}
-		return nil, nil
 	}
+	if jsonutils.QueryBoolean(data, "auto_start", false) {
+		return self.PerformStart(ctx, userCred, query, data)
+	}
+	return nil, nil
 }
 
 func (self *SGuest) startDetachIsolateDevice(ctx context.Context, userCred mcclient.TokenCredential, device string) error {
@@ -1648,10 +1653,10 @@ func (self *SGuest) PerformAttachIsolatedDevice(ctx context.Context, userCred mc
 		logclient.AddActionLogWithContext(ctx, self, logclient.ACT_GUEST_ATTACH_ISOLATED_DEVICE, msg, userCred, false)
 		return nil, httperrors.NewInvalidStatusError(msg)
 	}
+	var err error
 	if data.Contains("device") {
 		device, _ := data.GetString("device")
-		err := self.startAttachIsolatedDevice(ctx, userCred, device)
-		return nil, err
+		err = self.startAttachIsolatedDevice(ctx, userCred, device)
 	} else if data.Contains("model") {
 		vmodel, _ := data.GetString("model")
 		var count int64 = 1
@@ -1661,10 +1666,18 @@ func (self *SGuest) PerformAttachIsolatedDevice(ctx context.Context, userCred mc
 		if count < 1 {
 			return nil, httperrors.NewBadRequestError("guest attach gpu count must > 0")
 		}
-		err := self.startAttachIsolatedDevices(ctx, userCred, vmodel, int(count))
+		err = self.startAttachIsolatedDevices(ctx, userCred, vmodel, int(count))
+	} else {
+		return nil, httperrors.NewMissingParameterError("device||model")
+	}
+
+	if err != nil {
 		return nil, err
 	}
-	return nil, httperrors.NewMissingParameterError("device||model")
+	if jsonutils.QueryBoolean(data, "auto_start", false) {
+		return self.PerformStart(ctx, userCred, query, data)
+	}
+	return nil, nil
 }
 
 func (self *SGuest) startAttachIsolatedDevices(ctx context.Context, userCred mcclient.TokenCredential, gpuModel string, count int) error {
@@ -1778,6 +1791,9 @@ func (self *SGuest) PerformSetIsolatedDevice(ctx context.Context, userCred mccli
 			return nil, err
 		}
 	}
+	if jsonutils.QueryBoolean(data, "auto_start", false) {
+		return self.PerformStart(ctx, userCred, query, data)
+	}
 	return nil, nil
 }
 
@@ -3933,12 +3949,20 @@ func (self *SGuest) validateCreateInstanceSnapshot(
 		return nil, httperrors.NewInvalidStatusError("guest can't do snapshot in status %s", self.Status)
 	}
 
+	var name string
 	ownerId := self.GetOwnerId()
 	dataDict := data.(*jsonutils.JSONDict)
-	name, err := dataDict.GetString("name")
-	if err != nil || len(name) == 0 {
+	nameHint, err := dataDict.GetString("generate_name")
+	if err == nil {
+		name, err = db.GenerateName(InstanceSnapshotManager, ownerId, nameHint)
+		if err != nil {
+			return nil, err
+		}
+		dataDict.Set("name", jsonutils.NewString(name))
+	} else if name, err = dataDict.GetString("name"); err != nil {
 		return nil, httperrors.NewMissingParameterError("name")
 	}
+
 	err = db.NewNameValidator(InstanceSnapshotManager, ownerId, name, "")
 	if err != nil {
 		return nil, err
@@ -3971,12 +3995,14 @@ func (self *SGuest) validateCreateInstanceSnapshot(
 func (self *SGuest) PerformInstanceSnapshot(
 	ctx context.Context, userCred mcclient.TokenCredential, query jsonutils.JSONObject, data jsonutils.JSONObject,
 ) (jsonutils.JSONObject, error) {
+	ownerId := self.GetOwnerId()
+	lockman.LockClass(ctx, InstanceSnapshotManager, ownerId.GetProjectId())
+	defer lockman.ReleaseClass(ctx, InstanceSnapshotManager, ownerId.GetProjectId())
 	pendingUsage, err := self.validateCreateInstanceSnapshot(ctx, userCred, query, data)
 	if err != nil {
 		return nil, err
 	}
 	name, _ := data.GetString("name")
-	ownerId := self.GetOwnerId()
 	instanceSnapshot, err := InstanceSnapshotManager.CreateInstanceSnapshot(ctx, ownerId, self, name)
 	if err != nil {
 		QuotaManager.CancelPendingUsage(
@@ -4079,7 +4105,7 @@ func (self *SGuest) PerformSnapshotAndClone(
 			self.GetQuotaPlatformID(), pendingUsage, pendingUsage)
 		return nil, httperrors.NewInternalServerError("Generate snapshot name failed %s", err)
 	}
-	instanceSnapshot, err := InstanceSnapshotManager.CreateInstancSnapshot(ctx, self.GetOwnerId(), self, instanceSnapshotName)
+	instanceSnapshot, err := InstanceSnapshotManager.CreateInstanceSnapshot(ctx, self.GetOwnerId(), self, instanceSnapshotName)
 	if err != nil {
 		QuotaManager.CancelPendingUsage(
 			ctx, userCred, rbacutils.ScopeProject, self.GetOwnerId(),