When you installed TeamViewer 9 into my Linux desktop I found one unpleasant bug.
I had to write my TeamViewer username and password to the „Computers & Contacts“ window each restart.
Here is workaround !
- Shutdown TeamViewer
- Run terminal
- Create empty configuration file by command
echo -n "" > ~/.config/teamviewer9/config/client.conf
- Run TeamViewer again and login
- TeamViewer should remember your credentials now