Giulio - It would appear that your issue with acer-wmi is a separate bug to this one (which seems to be exclusively BCM4311).
Look at bug #771758 for a report identical to yours with a BCM43225, though that is likely to become a duplicate of another...
Giulio - It would appear that your issue with acer-wmi is a separate bug to this one (which seems to be exclusively BCM4311).
Look at bug #771758 for a report identical to yours with a BCM43225, though that is likely to become a duplicate of another...