Okay now I'm confused....
firstly your "inxi -Fz" output said you were currently using the nouveau driver
then you suggested additional drivers only offered you nouveau
now you're suggesting additional drivers is saying you're currently using the proprietary nvidia driver, and can swap it for nouveau if you'd like

We're never going to solve this if you keep changing drivers between posts and don't tell us about it
what's the output from:
right now ?
and what's the output from
[EDIT]
Also, try this...
Open a terminal and run:
mv ~/.Sayonara ~/.Sayonara-old
now try running Sayonara.