1) Go to the power/config menu in the upper right and choose "System Settings".
2) Open "Additional Drivers"
3) Choose the most up-to-date proprietary driver it lists that is not labeled "experimental"
4) Click "Activate"
5) Wait for it to download and activate the driver
6) Try again. If it does not work then reboot and try again ;)
1) Go to the power/config menu in the upper right and choose "System Settings".
2) Open "Additional Drivers"
3) Choose the most up-to-date proprietary driver it lists that is not labeled "experimental"
4) Click "Activate"
5) Wait for it to download and activate the driver
6) Try again. If it does not work then reboot and try again ;)