Difference between revisions of "ASUS Eee PC 1025c"

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(Asus Eee PC backlight is automatically handled now.)
(clarify the poulsbo note)
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{{Note|This laptop uses a [[Poulsbo]] GPU.}}
{{Note|This laptop uses a [[Poulsbo]] GPU. Hardware acceleration is currently unsupported.}}
== Bootloader ==
== Bootloader ==

Revision as of 08:38, 30 April 2015

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Reason: (Discuss in Talk:ASUS Eee PC 1025c#)
Note: This laptop uses a Poulsbo GPU. Hardware acceleration is currently unsupported.


Use i686 even if Intel ARK mentions support for Intel 64. The Arch ISO will detect i686.

For BIOS legacy boot, create a USB stick with dd. Press F2 to go into the boot menu. Choose the entry for your USB stick that doesn't say "UEFI:". The BIOS gives an option for UEFI booting but the option seems to be broken.


Mono format

In case of missing voices, play all sounds in mono format. Using ALSA add to .asoundrc:

pcm.card0 {
  type hw
  card 0

ctl.card0 {
  type hw
  card 0

pcm.monocard {
  slave.pcm card0
  slave.channels 2
#  type plug
  type route
  ttable {
   # Copy both input channels to output channel 0 (Left). 
    0.0 1
    1.0 1
   # Send nothing to output channel 1 (Right). 
    0.1 0
    1.1 0

ctl.monocard {
  type hw
  card 0

pcm.!default monocard

Save and reload ALSA.

To set mono in a PulseAudio, run:

 $ pacmd list-sinks | grep name | head -n1 

To get the master device name. The output of command will look like this:

 name: <alsa_output.pci-0000_00_1b.0.analog-stereo>

Put device name (in my case alsa_output.pci-0000_00_1b.0.analog-stereo) in field 'master' of the command below:

 $ pacmd load-module module-remap-sink sink_name=mono master=alsa_output.pci-0000_00_1b.0.analog-stereo channels=2 channel_map=front-right,mono

This only works if PulseAudio is running. To make this permanent, add the pacmd argument last to /etc/pulse/default.pa:

 # echo "load-module module-remap-sink sink_name=mono master=alsa_output.pci-0000_00_1b.0.analog-stereo channels=2 channel_map=front-right,mono" >> /etc/pulse/default.pa



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

# xrandr --output DVI-0 --auto


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

aplay -l
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


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

See Advanced_Linux_Sound_Architecture#HDMI_Output_Does_Not_Work.


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)

#! /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:

pcm.!default {
      type hw
      card 0
      device 3 
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

The backlight directory is /sys/class/backlight/acpi_video0. The display keys are now handled by the kernel.