Any Qt5 (note, Qt5 only. Qt4 apps look fine.) when run over SSH's X11-forwarding take on an ugly theme and nearly no icons.

Running systemsettings5 shows that the theme and icons set to Breeze (what I want).

Screenshots:

Under Qt5 (Dolphin): http://i.imgur.com/gSVIRTe.png

Under Qt4 (qtconfig-qt4's About Qt window): http://i.imgur.com/7aIaJ5a.png

export QT_QPA_PLATFORM=kde

notice that if it's not actually KDE (4 or 5), applications with systray icons will be broken.

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This application failed to start because it could not find or load the Qt platform plugin "kde"
in "".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, xcb.


Is what I'm currently seeing when I try to set it to "kde" - Applications over X11 forwarding still have no icons or theme elements

In the remote SSH session:

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export XDG_CURRENT_DESKTOP=kde

works to display the proper theme and icons