All the notebook devices work with a very good performance.

Example: all the devices work, the 3D acceleration is supported

All the notebook devices work but not at full performance.

A typical example: all the devices work, but the 3D acceleration is not supported

One main device is not supported.

Example: The internal wifi card does not work. You either need to modify the BIOS and install a free-software-compatible internal wifi card or use an external USB card

More than one device is not supported

The notebook does not work with free software

All device functions and features are supported

Printing supported but possibly at limited speed or print quality; scanning and/or faxing on some multifunction devices may not be supported

The printer does not work with free software

All device functions and features are supported

Scanning supported but possibly at limited speed or quality; some other features may not be supported

The scanner does not work with free software