Asus Eee PC 1225b

Backlight support
Brightness LCD may changed by Fn+F5/Fn+F6. To support it you must config kernel

This options also add other functional of your laptop.

USB 3.0 support
USB 3.0 provides by ASMedia ASM1042 SuperSpeed Controller. Gentoo sources have drivers for it

802.11 WiFi
WiFi is provided by Broadcom BCM4313 802.11bgn Wireless Network Adapter

Minstrel and its 802.11n support is a rate control algorithm should always be activated.

Bluetooth
Bluetooth is provided by Broadcom(?) chip.

Ethernet
Ethernet is provided by a Realtek RTL8101E Fast Ethernet device.

You can compile ethernet driver as module, then you must check loading this module.

Graphics with open-source radeon drivers
All the necessary firmware is provided with package (it is easy to emerge within a chrooted environment):

Kernel parameters are well described in the article about Radeon. However the choice of firmware isn't that obvious. As it is supposed here, APU is usually detected as PALM, while in fact it is closer to SUMO. The only way out is to compile them both into kernel:

This lets kernel modesetting work properly.

ALSA configuration
A good way to manage ALSA is to emerge alsa-utils:

To start alsa at boot time type:

There is a problem that actually ALSA often sees two sound cards: HD-Audio Generic (that is a kind of a virtual device, i.e. it doesn't actually play music) and the required HDA ATI SB. The simplest way to check it is to launch

If HD-Audio Generic is the first number, it might be the default card. If it is the case, than you're likely to have no sound unless the default card is switched from 0 to 1.

Memory Card Reader
Card reader is provided by Alcor Micro.

Webcam
Webcam is supported with standart UVC

See aslo

 * Power_management/Guide
 * Bluetooth
 * WiFi
 * Radeon