This section lists possible issues you may encounter while using QtApplicationManager and how to solve them.
How do I check whether my application manager instance is running in multi-process mode?
Start the Application manager with the
--verbose argument and verify that you see
WindowManager: running in Wayland mode in the output. Alternatively, start an application and make sure that you can see at least one
appman-launcher-qml process running.
How do I find out why my application manager instance doesn't support multi-process mode?
Check the "Application Manager configuration", which is visible when you run the
qmake command. It's possible that your configuration doesn't support the
My applications are running slowly within the application manager. What are some possible solutions?
Verify if your applications are running with hardware acceleration.
How do I find out if my applications use hardware acceleration?
appman, with the environment variable
QSG_INFO=1. When you start an application, you should see a similar output:
[DBG | qt.scenegraph.general | c.p.music] Using sg animation driver [DBG | qt.scenegraph.general | c.p.music] Animation Driver: using vsync: 16.95 ms [DBG | qt.scenegraph.general | c.p.music] texture atlas dimensions: 1024x1024 [DBG | qt.scenegraph.general | c.p.music] R/G/B/A Buffers: 8 8 8 8 [DBG | qt.scenegraph.general | c.p.music] Depth Buffer: 24 [DBG | qt.scenegraph.general | c.p.music] Stencil Buffer: 8 [DBG | qt.scenegraph.general | c.p.music] Samples: 0 [DBG | qt.scenegraph.general | c.p.music] GL_VENDOR: VMware, Inc. [DBG | qt.scenegraph.general | c.p.music] GL_RENDERER: llvmpipe (LLVM 5.0, 256 bits) [DBG | qt.scenegraph.general | c.p.music] GL_VERSION: 3.0 Mesa 17.3.0
llvmpipe, you're using software rendering for your Wayland clients.
Note: This information is also available for the System UI itself, based on the application's ID in the prefix. In the example above,
com.pelagicore.music is truncated to
How do I enable hardware acceleration?
This depends on your hardware and operating system:
You need to make sure that you have the correct drivers installed:
- For NVIDIA on Ubuntu or Debian you need
- For Intel on Ubuntu or Debian you need
On desktop systems, make sure your Qt is configured to use at least OpenGL ES2/ES3 instead of Desktop OpenGL. In Qt's configure summary, verify that you see the following line:
OpenGL ES 2.0 ........................ yes
You can force Qt to use Opengl ES2 by using the
--opengl es2 configure option.
Additionally, you also need to make sure that the
wayland-egl integration plugin is built. If the plugin built successfully, you should have the following file: <QT_DIR>/plugins/wayland-graphics-integration-client/libwayland-egl.so
If that file isn't available, check QtWayland's configure summary and make sure this plugin is built.
© 2019 Luxoft Sweden AB. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.