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What happens next depends on whether you re trying to connect a keyboard or mouse. Bear in mind that the process of pairing quickly times out on the Ubuntu computer, so you need to complete the following steps without hesitation: In the case of a mouse, enter the passkey that you read earlier in the manual for the mouse. As mentioned, this is usually 0000. After you click OK, the mouse should be paired and should start working. Some keyboards also use a default passkey of 0000, and, if so, you can enter that, and the keyboard should be paired. However, some Bluetooth keyboards might require you to enter a passkey created on the computer. In the Authentication Request dialog box on the Ubuntu PC, type a random four-digit passkey something like 1234 (although for security reasons, you might want to choose something that s slightly less easy to guess). Click OK. On the Bluetooth keyboard, type the same number and press Enter. Following this, you should find that the keyboard is paired with the computer and will work.

If the keyboard or mouse does not work after a reboot, try turning it on and off again. If that doesn t work, deactivate the Bluetooth functionality on the PC, perhaps by momentarily unplugging the Bluetooth dongle or, on a notebook, using the relevant keyboard combination to turn off and on again the Bluetooth system.

Generally speaking, your sound card shouldn t require any additional configuration and should work immediately after you install Ubuntu. The icon for the volume control applet is located at the top right of the Ubuntu Desktop, and it offers a quick way to control the master volume. However, if you want to change your balance or microphone level, or if your sound card offers more than stereo output, such as multiple-speaker surround sound, then it might be necessary to take some simple steps to allow full control of the hardware: 1. 2. 3. Click the volume control icon (the one that looks like a speaker). A simple volume control will open underneath. Click Sound Preferences below the volume slider. The Sound Preferences dialog box appears. On most computers, you will have just one simple stereo sound card shown in the Hardware tab, and there won t be much to configure. In the Output tab, you will be able to adjust the balance, should you ever need to, while in the Input tab you can unmute your microphone and adjust the input volume. If your computer has more than one sound card for example, onboard sound and an external USB 5.1 sound card you can set which card is active in the Hardware tab and then switch to the Output tab to adjust volume sliders for balance, fade, and subwoofer, as shown in Figure 7-20. On a notebook that has a sound card featuring pseudosurround sound, we could add a control to alter the intensity of the effect. When you ve finished, click the Close button.

Depending on the degree to which your computer supports power-saving functionality, Ubuntu will let you configure your display to go into standby mode after a certain amount of time and will also allow you to configure your notebook to enter sleep (standby) mode. In addition, if you use a notebook computer, Ubuntu might let you configure additional aspects, such as the display brightness. These functions are controlled by using the Power Management Preferences. To start this, click System Preferences Power Management. If Ubuntu is installed on a notebook computer, you ll see three tabs in the program window: On Mains Power, On Battery Power, and General. If Ubuntu is installed on a desktop computer, you ll see just the On Mains Power and General tabs.