[Nix-dev] virutalbox ova - screen settings reset on every restart

[Stephan Sahm]

Dear NixOS followers,

I tried to use the nixOS virtualbox from https://d3g5gsiof5omrk.
cloudfront.net/nixos/17.03/nixos-17.03.1449.2e983f14f6/nixos-17.03.1449.2e983f14f6-x86_64-linux.ova

It starts correctly, however, if I try to adapt the display scaling or
resolution to adapt for my 4k screen, the setting is lost on a restart. (As
KDE tells me to restart for the settings to become active, I never actually
see a rescaled KDE, but everything is very tiny).

So the question how to make these display settings be preserved upon
restart.
(I successfully isntalled git and okular and cloned some repositories and
stuff - everything is preserved as it should, only the display settings
seem to get lost sofar)

Any help is highly appreciated!,
best,
Stephan
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