#
# Setup Notes for Alsa snd_intel using  
#  mercurial 
#  source alsa-libs
#  source alsa-utils
#  source alsa-driver
#  source alsa-kernel

# REFERENCE: http://forums.gentoo.org/viewtopic-t-568135-start-0-postdays-0-postorder-asc-highlight-.html
# REFERENCE: http://gentoo-wiki.com/HOWTO_ALSA_sound_mixer_aka_dmix
# REFERENCE: http://forums.gentoo.org/viewtopic-t-567773-highlight-t61.html
# 
# KERNEL OPTIONS:
#  Device Drivers --->
#    Sound --->
#       <M> Soundcard Support
#          Advanced Linux Sound Architecture --->
#             < > Advanced Linux Sound Architecture
#          Open Sound System --->
#             < > Open Sound System 
	    
#
# options to boot:
#
cat /proc/cmdline
#   root=/dev/ram0 init=/linuxrc ramdisk=8192 real_root=/dev/sda2  doscsi


#
# Set card type in make.conf 
#
if [[ ! `grep ALSA_CARDS  /etc/make.conf &>/dev/null` ]]; then
cat >> /etc/make.conf <<'EOF'
   ALSA_CARDS="hda-intel"
EOF
else
  sed  -i 's/\(ALSA_CARDS="\).*/\1hda-intel"/' /etc/make.conf
fi

# No asla packages installed 
eix -I alsa 
# <empty>

# 
# For some reason this was makeing things not work later
#
rc-update delete alsasound
#  * 'alsasound' removed from the following runlevels: default
rm -rf /etc/init.d/alsasound

#
# Install alsa stuff here
#
cd /usr/src

#
# Download alsa-lib and alsa-utils from http://www.alsa-project.org/  
#
wget ftp://ftp.alsa-project.org/pub/lib/alsa-lib-1.0.14a.tar.bz2
wget ftp://ftp.alsa-project.org/pub/utils/alsa-utils-1.0.14.tar.bz2
alsa-utils-1.0.14.tar.bz2
tar xvf alsa-lib* 
tar xvf alsa-utils*

#
# Build driver/module
#
cd /usr/src
emerge --update --newuse --deep  mercurial   
hg clone http://hg-mirror.alsa-project.org/alsa-driver alsa-driver
cd alsa-driver
hg clone http://hg-mirror.alsa-project.org/alsa-kernel alsa-kernel
./hgcompile && make install
cd ..

#
# Search for the module
#
find /lib/modules/`uname -r` -name "snd-hda-inte*"
# /lib/modules/2.6.21-gentoo-r4/kernel/sound/pci/hda/snd-hda-intel.ko

#
# Load module
#
modprobe snd-hda-intel

#
# Add snd-hda-intel to modules autoload if it doesn't exist
#
if [[ ! `grep snd-hda-intel /etc/modules.autoload.d/kernel-2.6 &> /dev/null` ]]; then
 cat >> /etc/modules.autoload.d/kernel-2.6 <<'EOF'
# Sound Driver
snd-hda-intel
EOF
fi

# 
# Build libs and utils
#
cd alsa-lib*
./configure
make && make install
cd ..
cd alsa-utils*
./configure
make && make install

alsaconf
#  Continue
#    hda-intel  Intel Corporation 82801H (ICH8 Family) HD Audio Controller
#    <ok>
#      Configure snd-hda-intel.
#      Do you want to modify /etc/modules.d/alsa?
#      <yes>
#        OK, Sound driver is configured

rmmod snd_pcm snd_timer
rmmod snd snd_page_alloc
lsmod |grep snd
<empty>
modprobe snd-hda-intel
amixer  set PCM 100 unmute
#  Simple mixer control 'PCM',0
#  Capabilities: pvolume
#  Playback channels: Front Left - Front Right
#  Limits: Playback 0 - 39
#  Mono:
#  Front Left: Playback 39 [100%] [0.00dB]
#  Front Right: Playback 39 [100%] [0.00dB]

amixer  set Speaker 100 unmute
#  Simple mixer control 'Speaker',0
#    Capabilities: pswitch
#    Playback channels: Front Left - Front Right
#    Mono:
#    Front Left: Playback [on]
#    Front Right: Playback [on]

#
# Play song 
#

cat /proc/interrupts
#               CPU0       CPU1
#      0:     239692        110   IO-APIC-edge      timer
#      1:       4811          5   IO-APIC-edge      i8042
#      8:          0          0   IO-APIC-edge      rtc
#      9:      21146       7299   IO-APIC-fasteoi   acpi
#     12:      85830     119770   IO-APIC-edge      i8042
#     14:         56          6   IO-APIC-edge      ide0
#     16:     167612          1   IO-APIC-fasteoi   uhci_hcd:usb5, yenta, nvidia
#     17:          0          0   IO-APIC-fasteoi   uhci_hcd:usb3
#     18:          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
#     19:          0          0   IO-APIC-fasteoi   ehci_hcd:usb1
#     21:         17          1   IO-APIC-fasteoi   ehci_hcd:usb2
#     22:     165145      28039   IO-APIC-fasteoi   uhci_hcd:usb6, ohci1394, wifi0, HDA Intel
#     23:          0          0   IO-APIC-fasteoi   uhci_hcd:usb7
#    216:         32       1035   PCI-MSI-edge      eth0
#    217:       8868      15145   PCI-MSI-edge      libata
#    NMI:          0          0
#    LOC:      17269     330436
#    ERR:          0
#    MIS:          0

#
# Only the mute button works.  Volume up and down only unmute, volume level doesn't change.
#