diff --git a/src/vs/workbench/api/browser/mainThreadNotebook.ts b/src/vs/workbench/api/browser/mainThreadNotebook.ts
index 9f627eb2cf4..ba8c89315d1 100644
--- a/src/vs/workbench/api/browser/mainThreadNotebook.ts
+++ b/src/vs/workbench/api/browser/mainThreadNotebook.ts
@@ -21,6 +21,7 @@ import { ExtensionIdentifier } from 'vs/platform/extensions/common/extensions';
 import { IUndoRedoService } from 'vs/platform/undoRedo/common/undoRedo';
 import { ITextModelService } from 'vs/editor/common/services/resolverService';
 import { Emitter } from 'vs/base/common/event';
+import { ILogService } from 'vs/platform/log/common/log';
 
 export class MainThreadNotebookDocument extends Disposable {
 	private _textModel: NotebookTextModel;
@@ -181,7 +182,8 @@ export class MainThreadNotebooks extends Disposable implements MainThreadNoteboo
 		@INotebookService private _notebookService: INotebookService,
 		@IConfigurationService private readonly configurationService: IConfigurationService,
 		@IEditorService private readonly editorService: IEditorService,
-		@IAccessibilityService private readonly accessibilityService: IAccessibilityService
+		@IAccessibilityService private readonly accessibilityService: IAccessibilityService,
+		@ILogService private readonly logService: ILogService
 
 	) {
 		super();
@@ -582,21 +584,25 @@ export class MainThreadNotebooks extends Disposable implements MainThreadNoteboo
 	}
 
 	async $updateNotebookLanguages(viewType: string, resource: UriComponents, languages: string[]): Promise<void> {
+		this.logService.debug('MainThreadNotebooks#updateNotebookLanguages', resource.path, languages);
 		const textModel = this._notebookService.getNotebookTextModel(URI.from(resource));
 		textModel?.updateLanguages(languages);
 	}
 
 	async $updateNotebookMetadata(viewType: string, resource: UriComponents, metadata: NotebookDocumentMetadata): Promise<void> {
+		this.logService.debug('MainThreadNotebooks#updateNotebookMetadata', resource.path, metadata);
 		const textModel = this._notebookService.getNotebookTextModel(URI.from(resource));
 		textModel?.updateNotebookMetadata(metadata);
 	}
 
 	async $updateNotebookCellMetadata(viewType: string, resource: UriComponents, handle: number, metadata: NotebookCellMetadata): Promise<void> {
+		this.logService.debug('MainThreadNotebooks#updateNotebookCellMetadata', resource.path, handle, metadata);
 		const textModel = this._notebookService.getNotebookTextModel(URI.from(resource));
 		textModel?.updateNotebookCellMetadata(handle, metadata);
 	}
 
 	async $spliceNotebookCellOutputs(viewType: string, resource: UriComponents, cellHandle: number, splices: NotebookCellOutputsSplice[], renderers: number[]): Promise<void> {
+		this.logService.debug('MainThreadNotebooks#spliceNotebookCellOutputs', resource.path, cellHandle);
 		const textModel = this._notebookService.getNotebookTextModel(URI.from(resource));
 
 		if (textModel) {
diff --git a/src/vs/workbench/api/common/extHost.api.impl.ts b/src/vs/workbench/api/common/extHost.api.impl.ts
index 77f89a398a7..da4884a3b76 100644
--- a/src/vs/workbench/api/common/extHost.api.impl.ts
+++ b/src/vs/workbench/api/common/extHost.api.impl.ts
@@ -137,7 +137,7 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 	const extHostComment = rpcProtocol.set(ExtHostContext.ExtHostComments, new ExtHostComments(rpcProtocol, extHostCommands, extHostDocuments));
 	const extHostProgress = rpcProtocol.set(ExtHostContext.ExtHostProgress, new ExtHostProgress(rpcProtocol.getProxy(MainContext.MainThreadProgress)));
 	const extHostLabelService = rpcProtocol.set(ExtHostContext.ExtHosLabelService, new ExtHostLabelService(rpcProtocol));
-	const extHostNotebook = rpcProtocol.set(ExtHostContext.ExtHostNotebook, initData.uiKind === UIKind.Web ? new ExtHostNotebookController(rpcProtocol, extHostCommands, extHostDocumentsAndEditors, initData.environment) : new ExtHostNotebookController(rpcProtocol, extHostCommands, extHostDocumentsAndEditors, initData.environment, extensionStoragePaths));
+	const extHostNotebook = rpcProtocol.set(ExtHostContext.ExtHostNotebook, initData.uiKind === UIKind.Web ? new ExtHostNotebookController(rpcProtocol, extHostCommands, extHostDocumentsAndEditors, initData.environment, extHostLogService) : new ExtHostNotebookController(rpcProtocol, extHostCommands, extHostDocumentsAndEditors, initData.environment, extHostLogService, extensionStoragePaths));
 	const extHostTheming = rpcProtocol.set(ExtHostContext.ExtHostTheming, new ExtHostTheming(rpcProtocol));
 	const extHostAuthentication = rpcProtocol.set(ExtHostContext.ExtHostAuthentication, new ExtHostAuthentication(rpcProtocol));
 	const extHostTimeline = rpcProtocol.set(ExtHostContext.ExtHostTimeline, new ExtHostTimeline(rpcProtocol, extHostCommands));
diff --git a/src/vs/workbench/api/common/extHostNotebook.ts b/src/vs/workbench/api/common/extHostNotebook.ts
index 9d9c567c468..e83ba02730b 100644
--- a/src/vs/workbench/api/common/extHostNotebook.ts
+++ b/src/vs/workbench/api/common/extHostNotebook.ts
@@ -15,6 +15,7 @@ import { NotImplementedProxy } from 'vs/base/common/types';
 import { URI, UriComponents } from 'vs/base/common/uri';
 import * as UUID from 'vs/base/common/uuid';
 import { IExtensionDescription } from 'vs/platform/extensions/common/extensions';
+import { ILogService } from 'vs/platform/log/common/log';
 import { CellKind, ExtHostNotebookShape, IMainContext, INotebookDocumentsAndEditorsDelta, INotebookEditorPropertiesChangeData, MainContext, MainThreadDocumentsShape, MainThreadNotebookShape, NotebookCellOutputsSplice } from 'vs/workbench/api/common/extHost.protocol';
 import { ExtHostCommands } from 'vs/workbench/api/common/extHostCommands';
 import { ExtHostDocumentData } from 'vs/workbench/api/common/extHostDocumentData';
@@ -943,6 +944,7 @@ export class ExtHostNotebookController implements ExtHostNotebookShape, ExtHostN
 		commands: ExtHostCommands,
 		private _documentsAndEditors: ExtHostDocumentsAndEditors,
 		private readonly _webviewInitData: WebviewInitData,
+		private readonly logService: ILogService,
 		private readonly _extensionStoragePaths?: IExtensionStoragePaths,
 	) {
 		this._proxy = mainContext.getProxy(MainContext.MainThreadNotebook);
@@ -1445,6 +1447,7 @@ export class ExtHostNotebookController implements ExtHostNotebookShape, ExtHostN
 	}
 
 	$acceptModelChanged(uriComponents: UriComponents, event: NotebookCellsChangedEvent): void {
+
 		const document = this._documents.get(URI.revive(uriComponents).toString());
 
 		if (document) {
@@ -1461,6 +1464,7 @@ export class ExtHostNotebookController implements ExtHostNotebookShape, ExtHostN
 	}
 
 	$acceptEditorPropertiesChanged(uriComponents: UriComponents, data: INotebookEditorPropertiesChangeData): void {
+		this.logService.debug('ExtHostNotebook#$acceptEditorPropertiesChanged', uriComponents.path, data);
 		const editor = this._getEditorFromURI(uriComponents);
 
 		if (!editor) {