ALT+R has completely stopped working

This is on 2.79. I looked in the hotkeys and it’s set properly. I reset my Blender’s settings. And other hotkeys like ALT+G work, but ALT+R does not work no matter what I do. Is there something I’m missing?

You want to reset the rotation?
Or did you mean CRTL+R for loop cuts?

Which OS are you on? If it’s Linux, check your desktop environment key bindings. Some more popular desktops like Gnome and Plasma tend to use Alt and its combos for their own purposes, so Blender simply never receives that keypress event.

I’m using Windows 10. And I’m trying to reset rotations. But I managed to fix the issue by re-downloading Blender anyway.