Making LibreOffice run at an acceptable speed under Qubes OS

The following changes will make LibreOffice run normally again under Qubes OS.

First, put the following text in file /etc/profile.d/libreoffice_kf5.sh within your template qube:

export SAL_USE_VCLPLUGIN=kf5

Then install the package libreoffice-kf5 in your template qube:

sudo dnf install -y libreoffice-kf5

Now stop your template qube and your application qube.

Start your application qube and open up LibreOffice.  It should run almost as fast as it used to.

To confirm that the fix took, under a terminal in your application qube, run command env | grep SAL_USE to check that the value of the variable is there.