ASUS Eee PC 1025c

Caution: I am learning linux with arch and my Eee PC. So my solutions may be not the best.

Bootloader

The BIOS doesn't seem to support EFI boot on an ArchISO USB stick, even though it detects it as a UEFI bootable medium. Install with a BIOS bootloader unless you know what you're doing. If you are able to boot in UEFI mode, then please add a tutorial.

HDMI

Video

You have to change the video driver. If the HDMI cable is plugged in on boot it is enabled automatically. If it is plugged in after boot you can use xrandr to enable the second monitor:

# xrandr --output DVI-0 --auto

Audio

You need to know the number of your sound card and the the number of HDMI device:

aplay -l

 **** Liste der Hardware-Geräte (PLAYBACK) ****
Karte 0: Intel [HDA Intel], Gerät 0: ALC269VB Analog [ALC269VB Analog]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 0: Intel [HDA Intel], Gerät 3: HDMI 0 [HDMI 0]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0

Global

In /usr/shared/alsa/alsa.conf search the lines

default.pcm.card 0
default.pcm.device 0

If you change the numbers to your card and device (in my case card is 0 and device is 3) and reboot the audio output switches to HDMI.

User specific

do this and reboot

Dynamic

The audio device can also be configured with /etc/asound.conf So you can create a script that links asound.conf to a configuration depending on the hdmi cable plugged in or not: (for some reason my HDMI device is listed as DVI)

hdmi_switched.sh

#! /bin/bash
hdmi_status="$(cat /sys/class/drm/card0-DVI-D-1/status)"
ln -f "/etc/alsa/hdmi_$hdmi_status" /etc/alsa/asound.conf
alsactl restore

Configuration files:

hdmi_connected

pcm.!default {
      type hw
      card 0
      device 3 
}

hdmi_disconnected

pcm.!default {
      type hw
      card 0
      device 0 
}

Create a symbolic link to /etc/asound.conf

ln -s /etc/alsa/asound.conf /etc/asound.conf

If the user is allowed to run the hdmi_switch.sh script and is also allowed to change files in /etc/alsa folder you can bind that script to a key :D If you also want to change to monitor read this.

Screen Brightness

acpi

Setting brightness in /sys/class/backlight/acpi_video0/ with the scripts for acpid change the values of the files brightness and actual_brightness but do not have any effect on current screen brightness.

Set the following as kernel parameters in your bootloader

acpi_osi=Linux acpi_backlight=vendor

To make this permant see here

FN Keys

Now there is a folder eeepc-wmi in /sys/class/backlight and the scripts need to be updated

/etc/acpi/actions/bl_up.sh

  #!/bin/sh
  bl_device=/sys/class/backlight/eeepc-wmi/brightness
  echo $(($(cat $bl_device)+1)) >$bl_device

/etc/acpi/actions/bl_down.sh

  #!/bin/sh
  bl_device=/sys/class/backlight/eeepc-wmi/brightness
  echo $(($(cat $bl_device)-1)) >$bl_device

The scripts change the screen brightness everytime I run them. Unfortunately the acpi events for brightnessup and brightnessdown are not available anymore although the brightnessup key sets brightness to maximum and the brightnessdown key sets the brightness to max_brightness-1 :( (do not now where this happens) --> this may help

When using the Enlightenment 17 window manager, the brightness keys will work without any additional configuration and the backlight can be adjusted using the built-in backlight widget.

AC plug / unplug

/etc/acpi/handler.sh

 ..
 ac_adapter)
        case "$2" in
            ACPI0003:00)
                case "$4" in
                    00000000)
                        logger 'AC unpluged'
                        echo $(($(cat /sys/class/backlight/eeepc-wmi/max_brightness)/2)) > /sys/class/backlight/eeepc-wmi/brightness
			;;
                    00000001)
                        logger 'AC pluged'
                        echo $(($(cat /sys/class/backlight/eeepc-wmi/max_brightness)-1)) > /sys/class/backlight/eeepc-wmi/brightness
			;;
                esac
                ;;
            *)
                logger "AC Adapter ACPI action undefined: $2"
		;;
        esac
        ;;
 ..