https://qatools.knowledgebase.qt.io/tags/xvfb/Recent content in Xvfb on Software Quality Solutions Knowledge BaseHugoenCopyright © {year} The Qt Company Ltd. All rights reserved.Fri, 13 Nov 2026 15:06:45 +0100https://qatools.knowledgebase.qt.io/squish/howto/squish-gui-testing-with-docker-xvfb-for-x11/Fri, 13 Nov 2026 00:00:00 +0100https://qatools.knowledgebase.qt.io/squish/howto/squish-gui-testing-with-docker-xvfb-for-x11/<h2 id="overview">Overview<a href="#overview" class="header-anchor" ariaLabel="Anchor">&para;</a></h2> <p>This is a follow-up to <a href="https://www.qt.io/quality-assurance/blog/squish-gui-testing-with-docker-containers" target="_blank" rel="noopener">One-up Your Squish GUI Testing With Docker Containers</a> . It provides a reusable Ubuntu 24.04 reference image that generalizes the original one-off example. It keeps Xvfb and adds runtime AUT modes (launch and attach) and x11vnc for remote viewing. It is for X11 AUTs only. For Wayland AUTs, see <a href="../../squish/howto/squish-gui-testing-with-docker-sway-for-wayland/">Sway for Wayland AUTs</a> article.</p> <p>Docker isn't a VM and has no display server, so a GUI app in a plain container fails or runs headless. Xvfb, a software X11 server that renders to memory, gives the container a virtual screen.</p>