ASUS N55SF

This article or section does not follow the
Laptop page guidelines
.
Reason:
Stub (Discuss in
Talk:ASUS N55SF
)
This article or section is out of date.
Reason:
Has not seen an update since 2015. (Discuss in
Talk:ASUS N55SF
)
Hardware
PCI/USB ID
Working?
Intel graphics
Yes
NVIDIA graphics
Needs configuration
Graphic outputs
Partial
Ethernet
Yes
Wireless
Yes
Audio
Needs configuration
Touchpad
Yes
Camera
Yes
USB 3.0
Yes
Card Reader
Yes
Special Keys
Untested
Power management
Needs configuration
Hardware
CPU:
Intel Core i7-2630QM @ 2.00GHz
Mainboard:
Intel HM65 Express
RAM:
6/8GB DDR3
Display:
15,6" HD LED (1920x1080)
Graphics adapter:
Intel Core Processor Integrated Graphics Controller, NVIDIA GeForce GT 555M
Soundcard:
Integrated Intel HDA, Bang & Olufsen speakers with external subwoofer
Network:
Atheros Gigabit Ethernet Controller, Intel Centrino Wireless-N 1030
Hard disk:
Seagate Momentus 750GB 5400rpm SATA
Webcam:
IMC Networks
Touchpad:
Synaptics
There is a BIOS update (v207) on ASUS support website (go to the English one if you do not find) that fix the numpad bug.
Audio
Follow the official documentation:
ALSA
or/and
PulseAudio
.
Subwoofer
PulseAudio
We need PulseAudio profile which will use
surround21
ALSA device:
/usr/share/pulseaudio/alsa-mixer/profile-sets/default.conf
...
[Mapping analog-surround-21]
device-strings = surround21:%f
channel-map = front-left,front-right,lfe
paths-output = analog-output analog-output-lineout analog-output-speaker analog-output-desktop-speaker
priority = 10
direction = output
...
Lfe remixing must be enabled for remixing third channel:
~/.config/pulse/daemon.conf
enable-lfe-remixing = yes
To prevent volume changing of PCM set volume to ignore in:
/usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf.common
[Element PCM]
switch = on
volume = ignore
override-map.1 = all
override-map.2 = all-left,all-right
Install
blop
,
cmt
and
ladspa
and append these lines to your default.pa if you want to configure subwoofer on every PulseAudio daemon start:
Note
Before using this configuration you should change
alsa_output.pci-0000_00_1b.0.analog-stereo-21
to your own name of sink(you can find names of your sinks in PulseAudio with command
$ pactl list sinks
).
~/.config/pulse/default.pa
load-module module-ladspa-sink  sink_name=ladspa_low_pass master=alsa_output.pci-0000_00_1b.0.analog-stereo-21 plugin=lp4pole_1671 label=lp4pole_fcrcia_oa control=200,0
load-module module-remap-sink   sink_name=remapLFE        master=ladspa_low_pass                               remix=no   channels=1 master_channel_map=lfe                    channel_map=lfe
load-module module-remap-sink   sink_name=remap20         master=alsa_output.pci-0000_00_1b.0.analog-stereo-21 remix=no   channels=2 master_channel_map=front-left,front-right channel_map=front-left,front-right
load-module module-combine-sink sink_name=combine         slaves=remap20,remapLFE                                         channels=3                                           channel_map=front-left,front-right,lfe
set-default-sink combine
Commands to control volume:
pactl set-sink-volume 0 +10%
pactl set-sink-volume 0 -- -10%
pactl set-sink-mute 0 toggle
Note
When we compare PulseAudio and ALSA low pass filter configuration we find out that subwoofer is less heard, it is because PulseAudio use own remixing method which sends to subwoofer half of left and right channel.
ALSA
External subwoofer + low pass filter configuration. Configuration uses
blop
,
cmt
and
ladspa
.
/etc/asound.conf
# upmix 2channels to 3, one for LFE
pcm.upmix2021 {
    type plug
    slave.pcm lowpass2121
    slave.channels 3
    ttable {
        0.0    1
        1.1    1
        0.2    1
        1.2    1
    }
}

# low pass filter for LFE channel
pcm.lowpass2121 {
    type ladspa
    slave.pcm upmix2121
    path "/usr/lib/ladspa"
    channels 3
    plugins {       
        0 {
            id 1672 # 4 Pole Low-Pass Filter with Resonance (FCRCIA) (1672/lp4pole_fcrcia_oa)
            policy none
            input.bindings.2 "Input";
            output.bindings.2 "Output";
            input { controls [ 200 0 ] }
        }
        1 {
            id 1098
            policy duplicate
            input.bindings.0 "Input";
            output.bindings.0 "Output";        
        }         
    }
}

pcm.upmix2121 {
    type plug
    slave.pcm surround21
    slave.channels 3
    ttable {
        0.0 1
        1.1 1
        2.2 1
    }
}

pcm.!default upmix2021