Something Weird (not necessarily support question though)

[jens]

It sounds very strange, if anything as you say it should be problematic to run the game with DD and not with a regular static desktop. I don't know enough about Linux to offer any insight.

Your log looks like it should.

It is possible it has to do with color grading, we are going to release a patch in the coming weeks that adds the option to disabled color grading, so could try then and see if turning it off in the game makes any difference.