Debian 11 (Bullseye) install for python 3

This installation method should be used if you want to run the latest version of QtPyVCP under python 3 and Linuxcnc 2.9pre.

This type of installation is editable, meaning you can make changes to the source files and the changes will take effect when QtPyVCP is next run, without the need to manually update or reinstall anything. This also means you can update the QtPyVCP through the use of a git pull within the QtPyVCP source directory.


If you are not interested in development then it is simpler to install from PyPi per the Standard Install guide.

Note: We try to keep this up to date, but if you find additional dependencies are needed please notify one of the developers so it can be added.


These instructions are intended to support you performing an install into a clean Debian 11 (Bullseye) environment. The instructions have been crafted specifically with this in mind.

Install Into a Clean Debian-11 Environment


By NOT setting a root password (i.e. leave those fields blank) during the Debian-11 install, your user will automatically be a part of the sudo group. Otherwise you will need to add your user to the group OR use the ‘su’ command to login as root. Just remember to ‘exit’ before performing non sudo commands.

After you have completed a clean Debian 11 installation, log in and open a terminal window.

If you are performing this install for simulation/development then you can skip this step and move on to “install dependencies”.

Set up an RT Kernel:

sudo apt install -y linux-image-rt-amd64 linux-headers-rt-amd64 grub-customizer

Open ‘Grub Customizer’ and select the tab named ‘General settings’. In the ‘default entry’ section at the top of the tab ensure the radio button for ‘predefined’ is selected.

From the dropdown selection pick the entry for the RT kernel. It will have the text ‘-rt-amd64’ at the end of its name.

Adjust the text box under ‘kernel parameters’ for any boot parameters you need. e.g. on a multi core PC you will usually be using ‘isolcpus=’ with some set of CPU numbers for the cores that should be isolated.

Save your changes and once completed. Exit. Remember to let the save process complete it processing, it can take quite a few seconds.


Open a terminal and type:

uname -a

This will list the full details of the booted kernel. You should see the text ‘PREEMPT_RT’ in this string. This indicates you have booted into the real time kernel. If not , repeat the grub customization process and ensure save completes correctly before rebooting.

Then install the dependencies:

sudo apt install -y geany git debhelper dh-python libudev-dev tcl8.6-dev tk8.6-dev bwidget tclx libeditreadline-dev asciidoc dblatex docbook-xsl dvipng ghostscript graphviz groff imagemagick inkscape python3-lxml source-highlight w3c-linkchecker xsltproc texlive-extra-utils texlive-font-utils texlive-fonts-recommended texlive-lang-cyrillic texlive-lang-french texlive-lang-german texlive-lang-polish texlive-lang-spanish texlive-latex-recommended asciidoc-dblatex python3-dev python3-tk libxmu-dev libglu1-mesa-dev libgl1-mesa-dev libgtk2.0-dev libgtk-3-dev gettext intltool autoconf libboost-python-dev libmodbus-dev libusb-1.0-0-dev psmisc yapps2 libepoxy-dev python3-xlib python3-pyqt5 python3-dbus.mainloop.pyqt5 python3-pyqt5.qtopengl python3-pyqt5.qsci python3-pyqt5.qtmultimedia python3-pyqt5.qtquick qml-module-qtquick-controls gstreamer1.0-plugins-bad  libqt5multimedia5-plugins pyqt5-dev-tools python3-dev python3-setuptools python3-wheel python3-pip python3-yapps dpkg-dev python3-serial libtk-img qttools5-dev qttools5-dev-tools python3-wheel espeak espeak-data espeak-ng freeglut3 gdal-data gstreamer1.0-tools libaec0 libarmadillo10 libarpack2 libcfitsio9 libcharls2 libdap27 libdapclient6v5 libepsilon1 libespeak1 libfreexl1 libfyba0 libgdal28 libgdcm3.0 libgeos-3.9.0 libgeos-c1v5 libgeotiff5 libgif7 libglew2.1 libgtksourceview-3.0-dev libhdf4-0-alt libhdf5-103-1 libhdf5-hl-100 libimagequant0 libkmlbase1 libkmldom1 libkmlengine1 liblept5 libmariadb3 libminizip1 libnetcdf18 libodbc1 libogdi4.1 libopencv-calib3d4.5 libopencv-contrib4.5 libopencv-core4.5 libopencv-dnn4.5 libopencv-features2d4.5 libopencv-flann4.5 libopencv-highgui4.5 libopencv-imgcodecs4.5 libopencv-imgproc4.5 libopencv-ml4.5 libopencv-objdetect4.5 libopencv-photo4.5 libopencv-shape4.5 libopencv-stitching4.5 libopencv-video4.5 libopencv-videoio4.5 libportaudio2 libpq5 libproj19 libprotobuf23 libqhull8.0 librttopo1 libsocket++1 libspatialite7 libsuperlu5 libsz2 libtbb2 libtesseract4 liburiparser1 libxerces-c3.2 libxml2-dev mariadb-common mesa-utils mysql-common odbcinst odbcinst1debian2 proj-bin proj-data python3-configobj python3-espeak python3-gi-cairo python3-olefile python3-opencv python3-opengl python3-pil python3-pil.imagetk python3-pyqt5.qtsvg python3-pyqt5.qtwebkit tcl-tclreadline geotiff-bin gdal-bin glew-utils libgtksourceview-3.0-doc libhdf4-doc libhdf4-alt-dev hdf4-tools odbc-postgresql tdsodbc ogdi-bin python-configobj-doc libgle3 python-pil-doc python3-pil-dbg python3-pil.imagetk-dbg python3-sqlalchemy netcat

Create the working directories to hold linuxcnc source and qtpyvcp source:

cd ~
mkdir dev
cd dev
mkdir linuxcnc
cd linuxcnc
git clone rip
cd rip/src
./configure --with-realtime=uspace
make -j4

To build the debian packages:

cd ~/dev/linuxcnc/rip/debian
./configure uspace
cd ..
dpkg-buildpackage -b -uc
cd ..

All the debain packages will now be in this directory (~/dev/linuxcnc). To install the packages:

sudo dpkg -i linuxcnc-uspace_2.9.0~pre0_amd64.deb
sudo dpkg -i linuxcnc-doc-en_2.9.0~pre0_all.deb

If you wish to have documentation in another language please select the appropriate .deb file.

Commence the installation of QtPyVCP:

cd ~/dev
git clone
cd qtpyvcp
python3 -m pip install --editable .
cp scripts/.xsessionrc ~/

Log out and log back in again. This is necessary to ensure .local/bin is now part of your execution search path.

Testing the Install

Confirm that QtPyVCP installed correctly and is available by running:

qtpyvcp -h
qtpyvcp -i

Setting up QTDesigner

To install the qtdesigner plugins:

cd ~/dev/qtpyvcp/pyqt5designer/Qt5.15.2-64bit/python3.9/
sudo ./

Setting up the Sims

To install the qtpyvcp sims:

cp -r ~/dev/qtpyvcp/linuxcnc ~/

DONE! Enjoy