I don't know if Duffer and Lumooja are trying to be willfully obtuse or if they're genuinely unable to understand anything he is saying, but QuietBloke has explained quite clearly that he's using stock BlitzMax commands and doesn't see why he should have to delve into writing his own window management code to do something it should already do. And I agree with him. There is a function here which does not do what it's supposed to do, and that's a bug - be it OS or language related - not a programmer issue.
As for whether it's a BlitzMax bug or a Linux bug, I really can't say for certain, but it's definitely platform specific. I create a 1280x1024 window in Windows on a 1280x1024 desktop (so with the client area it doesn't fit) but it's still created the right size and I can drag it around to see the bits which are off screen. Report it in the BMax bug report forum if you haven't already. If Linux isn't capable of creating a window of the correct size, then BlitzMax at the very least needs to return the size of the window actually created.
As for whether it's a BlitzMax bug or a Linux bug, I really can't say for certain, but it's definitely platform specific. I create a 1280x1024 window in Windows on a 1280x1024 desktop (so with the client area it doesn't fit) but it's still created the right size and I can drag it around to see the bits which are off screen. Report it in the BMax bug report forum if you haven't already. If Linux isn't capable of creating a window of the correct size, then BlitzMax at the very least needs to return the size of the window actually created.