So I did my first monitor color calibration with my Spyder5. I know this is not the best possible calibration tool it is mighty slow but it is all I could afford
I did a XYZ Lut + matrix profile Medium speed and 800 patches. From everything I see in the report things look fine.
However, while messing about with gimp and color management (I wanted to see how the display changed between color managed and non color managed) I noticed a banding issue in my tests.
First I did some solid back fills and things looked fine when comparing managed and non managed.
Then I tried a black to white gradient and everything was smooth when non color managed but when I turned on my monitor profile the banding was hideous.
Did I do something wrong with my calibration/profile? From what I understand is I should not have any banding.