I enabled windmove by running
S-left and S-right work as expected when two windows are side by side.
However when a frame is splitted vertically, I cannot use S-up/S-down to switch between top and bottom window. Instead they become text selection (much like ctrl-space)
How can I fix this key bindings? Why
windmove-default-keybindings cannot set them?
Emacs version: GNU Emacs 24.5.1