I did a WEEKDAY search at the French train website www.sncf.com and found the following two trains that would get you there on time (with one change). I just don't know if you can land at CDG at 7:55, get your luggage, go through customs and get the the Gare de Lyon to get the first train - so the second set of trains might be your best bet.
Departure and destination stations Times Train(s) Journey time: 03h05
PARIS GARE DE LYON 08h44 #6755
DIJON VILLE 10h23
DIJON VILLE 11h06 #91413
CHALON SUR SAONE 11h49
Departure and destination stations Times Train(s) Journey time: 02h40
PARIS GARE DE LYON 10h34 #7659
DIJON VILLE 12h12
DIJON VILLE 12h23 #91415
CHALON SUR SAONE 13h14
If you look on this board (either under Transportation or West), I am almost certain that there was a post in the past few days asking how to get to CDG to Gare de Lyon.