Fix screen flashing problem with redshift

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As an alternative to flux I use redshift on my Linux machine. Recently I stumbled upon very weird problem – each time I close Java desktop app and redshift was active, the screen flashed. It was a very quick change that looked like redshift was disabled and then enabled again.

I was starting redshift like this:

redshift-gtk -l manual -l 51.126:17.033

After trying out few configuration options it turns out that changing video method to vidmode was the right solution for my problem:

redshift-gtk -l manual -l 51.126:17.033 -m vidmode

Now I can develop desktop Java apps without any screen flashing.