The shortcut is Alt + LShift + NumLock
The people at GNOME think that it's an error in the XServer. GNOME uses the flag XkbAccessKeys to enable or disable the keyboard accessible functions, but the Mouse key shortcut don't respect this. Thus it's an error in the XKB specification.
The only bug in GNOME is that the Keyboard Accessible functions box isn't selected, so the Mouse keys box looks grey.
The shortcut is Alt + LShift + NumLock
The people at GNOME think that it's an error in the XServer. GNOME uses the flag XkbAccessKeys to enable or disable the keyboard accessible functions, but the Mouse key shortcut don't respect this. Thus it's an error in the XKB specification.
The only bug in GNOME is that the Keyboard Accessible functions box isn't selected, so the Mouse keys box looks grey.