etc - system configuration

asound.conf

# ALSA
# /etc/asound.conf

# ipc_key must 	  - be unique, it has no other meaning.
# ipc_key_add_uid - allows multi user audio when false.
# ipc_perm 	  - sets permissions, may fix issues on multi user or tty playback.

# smaller buffer/period sizes can generally reduce latency and hence give better performance,
# but going too small can cause crackling or other sound issues.

# Better resampling
defaults.pcm.rate_converter "samplerate_best"

# 44100Hz
# Lossless CD quality

# Sound card
pcm.snd_card {
	type hw
	card 0
}

# Audio out
pcm.aout {
	type dmix
	ipc_key 1
	ipc_key_add_uid false
	ipc_perm 0660
	slave {
		pcm "snd_card"
		rate 44100
		channels 2

		# Buffer settings
		period_time 0
		period_size 1024
		buffer_time 0
		buffer_size 4096
	}
}

# Audio in
pcm.ain {
	type dsnoop
	ipc_key 2
	ipc_key_add_uid false
	ipc_perm 0660
	slave {
		pcm "snd_card"
		rate 44100
		channels 2

		# Buffer settings
		period_time 0
		period_size 1024
		buffer_time 0
		buffer_size 4096
    	}
}

# Set playback routes
pcm.asymed {
	type asym
	playback.pcm "aout"
	capture.pcm  "ain"  # Input won't work with aout settings ;)
}

# Surround 5.1 -> Stereo
pcm.!surround51 {
	type vdownmix
	slave.pcm "aout"
}

# Surround 4.0 -> Stereo
pcm.!surround40 {
	type vdownmix
	slave.pcm "aout"
}

# OSS compatibility
pcm.dsp0 {
	type plug
	slave.pcm "asymed"
}

# Default PCM
pcm.!default {
	type plug
	slave.pcm "asymed"
}

cpufreq

# /etc/conf.d/cpufreq

################
# CPU GOVERNOR #
################
governor="ondemand"

########
# FREQ #
########
min_freq="800MHz"
max_freq="2.4GHz" 

local.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
   <!-- /etc/fonts/local.conf -->
   <rejectfont>
      <!-- Reject ugly XServer fonts -->
      <pattern>
         <patelt name="family"><string>Fixed</string></patelt>
      </pattern>
      <pattern>
         <patelt name="family"><string>Clean</string></patelt>
      </pattern>

      <!-- Reject SimSun -->
      <pattern>
         <patelt name="family">
            <!-- "NSimSun" or "新宋体" can still be used -->
            <string>SimSun</string>
         </patelt>
      </pattern>

      <!-- "Arial Unicode MS" will take 1st place of fc-match, disable it -->
      <pattern>
         <patelt name="family">
            <string>Arial Unicode MS</string>
         </patelt>
      </pattern>
   </rejectfont>

   <match target="font">
      <!-- antialias -->
      <edit name="antialias" mode="assign">
         <bool>true</bool>
      </edit>

      <!-- hinting -->
      <edit name="hinting" mode="assign">
         <bool>true</bool>
      </edit>

      <!-- disable autohinting -->
      <edit name="autohint" mode="assign">
         <bool>false</bool>
      </edit>

      <!-- hint style -->
      <edit mode="assign" name="hintstyle" >
         <const>hintslight</const>
      </edit>

      <!-- rgba mode -->
      <edit name="rgba" mode="assign"><const>rgb</const></edit>

      <!-- seems only cario-lcd, *-lcd use this setting -->
      <edit mode="assign" name="lcdfilter">
         <const>lcddefault</const>
      </edit>

      <!-- dpi -->
      <edit mode="assign" name="dpi">
         <double>96</double>
      </edit>

      <!-- LCD filter -->
      <edit mode="assign" name="lcdfilter">
         <const>lcddefault</const>
      </edit>
   </match>

   <!-- Set sans-serif as fallback family -->
   <match target="pattern">
      <test qual="all" name="family" compare="not_eq">
         <string>sans-serif</string>
      </test>
      <test qual="all" name="family" compare="not_eq">
         <string>serif</string>
      </test>
      <test qual="all" name="family" compare="not_eq">
         <string>monospace</string>
      </test>
      <edit name="family" mode="append_last">
         <string>sans-serif</string>
      </edit>
   </match>

   <!-- Fallback to use Droid Sans, globally -->
   <match target="pattern">
      <edit name="family" mode="append" target="font" binding="weak">
         <string>Droid Sans Fallback</string>
         <string>Droid Sans Japanese</string>
         <string>Droid Sans Thai</string>
      </edit>
   </match>
</fontconfig> 

menu.lst

# Boot line in boot/grub/menu.lst
ro quiet splash fastboot elevator=bfq ipv6.disable=1 rootdelay=1 acpi_irq_nobalance video=vesafb:ywrap,mtrr:3 vga=773

modprobe.conf

#
# /etc/modprobe.d/modprobe.conf
#

# Increase mouse reaction rate
# ==========
# |Hz   |ms|
# ==========
# |1000 |1 |
# |500 	|2 |
# |250 	|4 |
# |125 	|8 |
# |100 	|10|
# ==========
# options usbhid mousepoll=8

# PC Speaker off
blacklist pcspkr
blacklist snd_pcsp

# Turn off second WLAN pci
blacklist rt73usb   

rc.local

#!/bin/bash
#
# /etc/rc.local: Local multi-user startup script.
#

############
# RC.LOCAL #
############

# no blanking
setterm -blank 0

# Kernel elevator parameter works for it, so the line below is not needed.
# I leave it there if it ever becomes useful.

# BFQ for -ck kernel
# [[ -n $(uname -r | grep -e '-ck') ]] && { modprobe bfq-iosched; echo bfq > /sys/block/sda/queue/scheduler; }

##########
# SYSCTL #
##########

/sbin/sysctl -p &> /dev/null

################
# CPU GOVERNOR #
################

# Change ondemand governor's up threshold
(sleep 10 && echo -n 25 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold) &

####################
# MAKE HDDs SILENT #
####################

hdparm -M254 /dev/sdb &> /dev/null
hdparm -M254 /dev/sdc &> /dev/null

################
# POWER SAVING #
################

# Disable watchdog
echo 0 > /proc/sys/kernel/nmi_watchdog &

# USB powersave
for i in /sys/bus/usb/devices/*/power; do
   [[ -f "$i/autosuspend" ]] || continue;
   echo 2 > "$i/autosuspend";
done &

# PCI, i2c powersave
for i in /sys/bus/{pci,i2c}/devices/*/power/control; do echo auto > $i; done &

# SATA powersave
for i in /sys/class/scsi_host/host*/link_power_management_policy; do echo min_power > $i; done &
echo min_power > /sys/class/scsi_host/host0/link_power_management_policy &

# Readahead
for dev in /dev/sd[a-z]; do
   [[ -f "$dev" ]] || continue
   blockdev --setra 3072 $dev &> /dev/null;
done &

# Sound card powersave
echo 1 > /sys/module/snd_hda_intel/parameters/power_save &
echo Y > /sys/module/snd_hda_intel/parameters/power_save_controller &

# Disable WOL
ethtool -s eth0 wol d &

########
# EXIT #
########
exit 0 

rc.shutdown

# /etc/rc.shutdown

# Add this after "Remounting Root Filesystem Read-only" (Just after power off)
# to fsck at shutdown instead of startup, note that arch init scripts update replaces the file.

if [ "$RUNLEVEL" = "0" ]; then
   stat_busy "Checking Filesystems"
   /sbin/fsck -A -T -C -a
   fsckret=$?
   if [ ${fsckret} -gt 1 ]; then
      stat_fail
   else
      stat_done
   fi
fi  

soundon.user

#!/bin/sh
# /usr/lib/oss/soundon.user
# Configuration for: 
# 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)

# Link to output
# Also remember to set vmix_no_autoattach=1 in $OSSLIBDIR/conf/osscore.conf
ln -sf /dev/oss/oss_hdaudio0/spdout0 /dev/dsp

# pcmin0 = input rear
# pcmin1 = input front
vmixctl attach /dev/oss/oss_hdaudio0/spdout0 /dev/oss/oss_hdaudio0/pcmin0

# Set rates
vmixctl rate /dev/oss/oss_hdaudio0/spdout0 44100
vmixctl rate /dev/oss/oss_hdaudio0/spdin0  44100
           
exit 0

sysctl.conf

#
# Kernel sysctl configuration
#

# Drop caches (on sysctl -p)
vm.drop_caches = 3

# Swappiness
vm.swappiness = 0
vm.vfs_cache_pressure = 50

# BFS tunable, interval of rotation queue
kernel.rr_interval = 3

# Filesystem
kernel.sem = 250 32000 100 128
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
fs.file-max = 65536

# http://www.westnet.com/~gsmith/content/linux-pdflush.htm
vm.dirty_background_ratio = 15

# When triggered, all processes are blocked for writes.
# 5 in http://www.kernel.org/pub/linux/kernel/people/ck/patches/2.6/2.6.38/2.6.38-ck3/patches/mm-decrease_default_dirty_ratio.patch
vm.dirty_ratio = 5

# VM Writeback Time
vm.dirty_writeback_centisecs = 15

# Kill process which triggers out of memory
vm.oom_kill_allocating_task = 1

# Comment to allow low-level messages on console
kernel.printk = 4 4 1 7

# Prevent some spoofing attacks
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1

# Disable packet forwarding
net.ipv4.ip_forward = 0

# Ignore ICMP broadcasts
net.ipv4.icmp_echo_ignore_broadcasts = 1

# Ignore bogus ICMP errors
net.ipv4.icmp_ignore_bogus_error_responses = 1

# Do not accept ICMP redirects (prevent MITM attacks)
net.ipv4.conf.all.accept_redirects = 0

# Do not send ICMP redirects (we are not a router)
net.ipv4.conf.all.send_redirects = 0

# Do not accept IP source route packets (we are not a router)
net.ipv4.conf.all.accept_source_route = 0

# Prevent SYN attacks
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 2048
net.ipv4.tcp_synack_retries = 2