[lubuntu-users] Strange, dark, look-and-feel of qjackctl, qsynth, and qmidiroute on Lubuntu 18.04

[Aere Greenway]

Lubuntu Users Group:

(Sorry - I initially sent this from the wrong e-mail address)


To mount my NFS drive on my local client systems, I needed something to 
get ask the user for root privilege.

On Lubuntu 16.04, I used gksu, but on Lubuntu 18.04, that package 
appears to be unavailable.

So in its place, I installed lxqt-sudo, and used that.

However, after installing that, a number of applications no longer have 
their normal Gnome look-and-feel, but instead, have a dark look, and 
take up a huge (much more than necessary) amount of screen real-estate.

The applications I'm having this problem with, are:

qjackctl

qsynth

qmidiroute

Does anyone know how I can change them back to their former Gnome 
look-and-feel (or even explain what has happened)?

The strange thing is, on some of my 18.04 systems, this didn't happen - 
those applications still have their usual Gnome look-and-feel.

I have been unable to determine why it is okay on some of my systems, 
and not on other systems.

- Aere

-- 
Sincerely,
Aere