It's not choosing the lowest frequency. Lionel just chose that as a random example from your xrandr.txt. That same file shows the current mode is:
2560x1440 (0xbb) 241.500MHz +HSync +VSync *current +preferred
It's not choosing the lowest frequency. Lionel just chose that as a random example from your xrandr.txt. That same file shows the current mode is:
2560x1440 (0xbb) 241.500MHz +HSync +VSync *current +preferred