# ASUS E403SA

Device | Status | Modules
Graphics | Working | xf86-video-intel
Wireless | Working | ath9k
Audio | Working | snd_hda_intel
Touchpad | Working | xf86-input-synaptics
Webcam | Working | uvcvideo
Suspend | Working | systemd-suspend
Function keys | Partially working |

## Hardware

### E403SA-WX0026T

- Processor: Intel Pentium N3700 1.60 GHz (2.4 GHz max)
- Display: 14.0", 1366x768
- Graphics: Integrated Intel HD Graphics 400 (Braswell)
- SSD: 128GB eMMC
- Memory: 4 GiB Hynix DIMM DDR3 1600 MHz
- Card Reader: Realtek RTS5129 (SD)
- Webcam: 640x480
- WLAN: Qualcomm Atheros AR9462
- Bluetooth: IMC Networks Atheros AR3012
- Touchpad: Elantech

## Configuration

### CPU

Read CPU frequency scaling about managing frequency.

### Video

Install xf86-video-intel, read Intel graphics for graphics driver setup. Both SNA and UXA acceleration works well.

### Touchpad

The touch works out of the box, read the Touchpad Synaptics page for driver install and configuration.

### Wi-Fi

Connecting wirelessly works out of the box with the `ath9k` driver, but times out sometimes during the DHCP lease process. Configuration can be done by editing the `/etc/modprobe.d/ath9k.conf` file. For example:

    /etc/modprobe.d/ath9k.conf

    options ath9k ps_enable=0 bt_ant_diversity=1 nohwcrypt=1

The `ps_enable=0` option disables power saving mode. `bt_ant_diversity=1` enables antenna diversity. `nohwcrypt=1` disables encryption and decryption with hardware which may solve some connection issues.

## Problems

### ACPI

ACPI functions such as the lid switch and `fn` keys do not work properly. Closing the lid will not suspend the laptop and pressing `fn`+`F6` will not increase the screen backlight. Suspending with the power key and resuming from suspend by opening the lid does work. `acpi_listen` only detects mute, volume up, volume down keys. However, when removing "Windows 2012" from the ACPI strings by setting `acpi_osi="!Windows 2012"` as a kernel parameter, the lid switch and all `fn` keys work perfectly but the the touchpad gets disabled.

Category:

- ASUS