From 7a89d62f122c6f9514bdc5fe1cd147b205b70298 Mon Sep 17 00:00:00 2001
From: DelazJ <delazj@gmail.com>
Date: Mon, 19 Jun 2023 17:14:08 +0200
Subject: [PATCH] Add hint for qgis_process usage on systems without window
 manager

Fixes #7947
---
 docs/user_manual/processing/standalone.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/user_manual/processing/standalone.rst b/docs/user_manual/processing/standalone.rst
index 1339ab28a3e..ab5a1372419 100644
--- a/docs/user_manual/processing/standalone.rst
+++ b/docs/user_manual/processing/standalone.rst
@@ -49,6 +49,11 @@ From a command line tool, run ``qgis_process`` and you should get:
   in their :file:`metadata.txt` file are recognized and can be activated
   or loaded by qgis_process tool.
 
+.. hint:: Before calling qgis_process on a system without window manager (e.g. a headless server),
+    you should set::
+
+     export QT_QPA_PLATFORM=offscreen
+
 
 The command ``list`` can be used to get a list of all available providers
 and algorithms.