In this little guide, we will introduce solutions for some problems related to Ubuntu's Unity interface (Dash and toolbar), window frames, and wireless connections that occur after upgrading to Ubuntu 12.10 (Quantal Quetzal). Before we start, you should know that these solutions may work for some users and some not.

1. Lost Unity Dash, Window Frames, and Top Panel

If Unity is not responding to user inputs after upgrading to 12.10 and window frames disappeared, you can try these fixes:

- For Nvidia graphics cards, try to reinstall nvidia-current with this command:

sudo apt-get install --reinstall nvidia-current

For  NVIDIA Optimus laptops, try to reinstall bumblebee with this command:

sudo apt-get install --reinstall bumblebee bumblebee-nvidia

Then reboot your system:

sudo reboot

- For ATI AMD graphics cards, try to remove the fglrx package with this command:

sudo apt-get autoremove fglrx --purge

Then reboot:

sudo reboot

If the fglrx package is not installed in your system, you can use these commands instead:

sudo apt-get autoremove fglrx-updates fglrx-amdcccle-updates --purge

sudo reboot

2. WiFi Stops Working After Upgrading To Ubuntu 12.10 (Broadcom Wireless cards)

You can fix wifi problems using two methods:

- Either connect to the internet via wired connection and run this command:

sudo apt-get update && sudo apt-get upgrade

Then reboot your system.

- Or use the following commands:

sudo apt-get install linux linux-headers-generic kernel-package

sudo apt-get install --reinstall bcmwl* firmware-b43-lpphy-installer b43-fwcutter

Finally, reboot your system.

If that didn't help, try these commands:

sudo apt-get remove bcmwl-kernel-source

sudo apt-get install firmware-b43-installer b43-fwcutter

sudo reboot

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