startx doesn't start to blackbox

[Marek Kolacek]

Description: Ubuntu 18.04.1 LTC
Release: Release 18.04

Package: X11 Org, Blackbox

Expected: When in runlevel 3 the startx starts blackbox

Current state: When in runlevel 3 and changed the
/etc/X11/default-display-manager to /usr/bin/blackbox
The X won't even start. The only solution is to keep
the gdm3 there in then I got the Gnome.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1789169/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Marek Kolacek (user681084)]

There is a workaround. Don't use startx at all.
Use under root following:
xinit /usr/bin/blackbox
After that X starts.
Under root. And it's possible to sudo su - to
user and then root programs under it.
However under common user command:
xinit /usr/bin/blackbox
won't start.