Hi Vertex, when you want to make a bug report, please read the introduction of this forum first, titled "Please read before posting".
You need to describe under which conditions and with which code you have a problem, otherwise Conitec can not know what you're talking about. When your script does not set a certain video mode, that can have many reasons, so you need to explain what you're doing and which function exactly fails.
You can see in the bug reports of other people how to post a report. Thank you!