diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e985ba..3f1ebd8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ### Fixed
 
+- Fixes [#1183](https://github.com/eamodio/vscode-gitlens/issues/1183) - stash all changes has no effect when the number of files is large
 - Fixes [#1308](https://github.com/eamodio/vscode-gitlens/issues/1308) - Escape quotes for PRs titles
 - Fixes [#1309](https://github.com/eamodio/vscode-gitlens/issues/1309) - "Fetch" not working on remote branches
 - Fixes an issue where many views wouldn't refresh properly when going from no items to some items
diff --git a/src/commands/git/stash.ts b/src/commands/git/stash.ts
index 9cf221f..23f76d8 100644
--- a/src/commands/git/stash.ts
+++ b/src/commands/git/stash.ts
@@ -496,7 +496,7 @@ export class StashGitCommand extends QuickCommand<State> {
 			} catch (ex) {
 				Logger.error(ex, context.title);
 
-				const msg: string = ex?.toString() ?? '';
+				const msg: string = ex?.message ?? ex?.toString() ?? '';
 				if (msg.includes('newer version of Git')) {
 					void window.showErrorMessage(`Unable to stash changes. ${msg}`);
 
diff --git a/src/git/git.ts b/src/git/git.ts
index 7bea0e1..6249598 100644
--- a/src/git/git.ts
+++ b/src/git/git.ts
@@ -25,6 +25,7 @@ export type GitDiffFilter = 'A' | 'C' | 'D' | 'M' | 'R' | 'T' | 'U' | 'X' | 'B'
 const emptyArray = (Object.freeze([]) as any) as any[];
 const emptyObj = Object.freeze({});
 const emptyStr = '';
+export const maxGitCliLength = 30000;
 const slash = '/';
 
 const textDecoder = new TextDecoder('utf8');
@@ -1308,18 +1309,19 @@ export namespace Git {
 		);
 	}
 
-	export function stash__push(
+	export async function stash__push(
 		repoPath: string,
 		message?: string,
 		{
 			includeUntracked,
 			keepIndex,
 			pathspecs,
-		}: { includeUntracked?: boolean; keepIndex?: boolean; pathspecs?: string[] } = {},
-	) {
+			stdin,
+		}: { includeUntracked?: boolean; keepIndex?: boolean; pathspecs?: string[]; stdin?: boolean } = {},
+	): Promise<void> {
 		const params = ['stash', 'push'];
 
-		if (includeUntracked || (pathspecs !== undefined && pathspecs.length !== 0)) {
+		if (includeUntracked || (pathspecs != null && pathspecs.length !== 0)) {
 			params.push('-u');
 		}
 
@@ -1331,12 +1333,23 @@ export namespace Git {
 			params.push('-m', message);
 		}
 
+		if (stdin && pathspecs != null && pathspecs.length !== 0) {
+			void (await git<string>(
+				{ cwd: repoPath, stdin: pathspecs.join('\0') },
+				...params,
+				'--pathspec-from-file=-',
+				'--pathspec-file-nul',
+			));
+
+			return;
+		}
+
 		params.push('--');
-		if (pathspecs !== undefined && pathspecs.length !== 0) {
+		if (pathspecs != null && pathspecs.length !== 0) {
 			params.push(...pathspecs);
 		}
 
-		return git<string>({ cwd: repoPath }, ...params);
+		void (await git<string>({ cwd: repoPath }, ...params));
 	}
 
 	export function status(
diff --git a/src/git/gitService.ts b/src/git/gitService.ts
index 7f87bde..764c67d 100644
--- a/src/git/gitService.ts
+++ b/src/git/gitService.ts
@@ -66,6 +66,7 @@ import {
 	GitTagParser,
 	GitTree,
 	GitTreeParser,
+	maxGitCliLength,
 	PullRequest,
 	PullRequestDateFormatting,
 	PullRequestState,
@@ -3897,21 +3898,39 @@ export class GitService implements Disposable {
 	) {
 		if (uris == null) return Git.stash__push(repoPath, message, options);
 
-		GitService.ensureGitVersion('2.13.2', 'Stashing individual files');
+		GitService.ensureGitVersion(
+			'2.13.2',
+			'Stashing individual files',
+			' Please retry by stashing everything or install a more recent version of Git.',
+		);
 
 		const pathspecs = uris.map(u => `./${Git.splitPath(u.fsPath, repoPath)[0]}`);
-		return Git.stash__push(repoPath, message, { ...options, pathspecs: pathspecs });
+
+		const stdinVersion = '2.30.0';
+		const stdin = GitService.compareGitVersion(stdinVersion) !== -1;
+		// If we don't support stdin, then error out if we are over the maximum allowed git cli length
+		if (!stdin && Arrays.countStringLength(pathspecs) > maxGitCliLength) {
+			GitService.ensureGitVersion(
+				stdinVersion,
+				`Stashing so many files (${pathspecs.length}) at once`,
+				' Please retry by stashing fewer files or install a more recent version of Git.',
+			);
+		}
+
+		return Git.stash__push(repoPath, message, {
+			...options,
+			pathspecs: pathspecs,
+			stdin: stdin,
+		});
 	}
 
 	static compareGitVersion(version: string) {
 		return Versions.compare(Versions.fromString(Git.getGitVersion()), Versions.fromString(version));
 	}
-
-	static ensureGitVersion(version: string, feature: string): void {
-		const gitVersion = Git.getGitVersion();
-		if (Versions.compare(Versions.fromString(gitVersion), Versions.fromString(version)) === -1) {
+	static ensureGitVersion(version: string, prefix: string, suffix: string): void {
+		if (GitService.compareGitVersion(version) === -1) {
 			throw new Error(
-				`${feature} requires a newer version of Git (>= ${version}) than is currently installed (${gitVersion}). Please install a more recent version of Git to use this GitLens feature.`,
+				`${prefix} requires a newer version of Git (>= ${version}) than is currently installed (${Git.getGitVersion()}).${suffix}`,
 			);
 		}
 	}
diff --git a/src/system/array.ts b/src/system/array.ts
index e7b79df..a0a87b2 100644
--- a/src/system/array.ts
+++ b/src/system/array.ts
@@ -17,6 +17,14 @@ export function chunk<T>(source: T[], size: number): T[][] {
 	return chunks;
 }
 
+export function countStringLength(source: string[]): number {
+	let length = 0;
+	for (const s of source) {
+		length += s.length;
+	}
+	return length;
+}
+
 export function countUniques<T>(source: T[], accessor: (item: T) => string): Record<string, number> {
 	const uniqueCounts = Object.create(null) as Record<string, number>;
 	for (const item of source) {