On 08/07/2015 12:24 PM, jd1008 wrote:
Creating another account and login in with that account, it works.
Does the new account also use Mate?
So, something changed, that has disabled the cntrl-alt-f keys.
It sounds like something's remapped them, but I don't use Mate and wouldn't know what special programs or settings it has. If you have more than one DE, try switching her first account to that and see what happens.