QT application window not shown when started directly with xinit as non-root user
xinit /usr/bin/VirtualBox -- :0 vt1 xinit /usr/bin/kdevelop -- :0 vt1
In both cases the main window does not show up and screen stays blank. Only the initial window, for example "One or more disk image files are not currently accessible. As a result, you will not be able to operate virtual machines that use these files until they become accessible later." shows up. This however makes the main window show up:
sudo xinit /usr/bin/VirtualBox -- :0 vt1 sudo xinit /usr/bin/kdevelop -- :0 vt1
xtermis started instead one also needs to use
sudofor the main windows to show up.
I'm using Slackware Linux but the same behavior was reported on Arch here: https://unix.stackexchange.com/questions/410233/arch-linux-running-virtualbox-without-a-window-manager.