sublime.log_commands() is saying the command isn’t executed, though other operations are logged. I tried restoring “Default\Default (Windows).sublime-keymap” from “Pristine Packages\Default.sublime-package”, but it was binary identical, and behaves the same. It contains:
56: { “keys”: “ctrl+alt+up”], “command”: “select_lines”, “args”: {“forward”: false} },
57: { “keys”: “ctrl+alt+down”], “command”: “select_lines”, “args”: {“forward”: true} },
Checking incase another package had overriden it somehow, Find in folder Packages, files *.sublime-keymaps only found mappings for “ctrl+alt+up” in “Default\Default (OSX).sublime-keymap” and “Default\Default (Windows).sublime-keymap” (i’m surprised at the OSX match, but I guess you call option “ctrl” for ease of adding mappings?). I’m stumped!