Mageia is my main distro, but I dual-boot with Mint for games. A recently installed RX460 card works well with Mint, but when I boot into Mageia 5 the only resolution available is 800 x 600. I have an old version still installed (Mint 15 with the 3.8 kernel), and even that supports my usual resolution of 1920 x 1080.
I'm not interested in getting graphics acceleration with Mageia 5, so this isn't a question about drivers, but I would like to know why Mageia can't use the higher resolutions, while even old versions of Mint can.