add the following to /etc/lxdm/PreLogin:
xsetroot -solid black
At last its just a small optical issue. But it makes me crazy.
When I'm logging in, a grey background is appearing before the Wallpaper is shown. I have no Idea how to change this. I've already tried to set the backgroundcolor to black, but it seems as if this has no influency.
Maybe someone has a hint for me?
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