Comment 5 for bug 191181

My post referred to by pauls is:

For those who are having trouble with the system turning off sticky-keys if two keys are pressed or if a modifier key is pressed with another key, I found a setting in Configuration Editor which has stopped that misbehaviour - for me. So, in case it helps others:

In Assistive Technologies Preferences > Keyboard Accessibility > Accessibility tab, I have always set:
1. Simulate simultaneous keypress - ticked
2. Disable sticky keys if two keys are pressed - never ticked
Notifications: General:
3. Beep when accessibility features are turned on or off - ticked
4. Beep when toggle key is pressed - ticked
Sticky Keys:
5. Beep when a modifier key is pressed - ticked

However, despite 2. above, I found 100% of the time pressing a modifier key and another key undid my settings. Very annoying with a trembling hand!

Then I looked in Configuration Editor:
Applications > System Tools > Configuration Editor > desktop > gnome > accesibility > keyboard.

I noticed that 'stickykeys_two_key_off' was still ticked which did not seem logical given my choices. So I unselected it and since then have not had a problem.

Hope this helps and works for you - sorry, I don't know a CLI way of doing it.

David