====== INTRODUCTION ======
After some tests on opnBSD/FreeBSD/TrueOS (the 2 last for zfs usage) I need to have a working laptop with Rolling Release method, simple to tweak and maintain.
I will use archlinux-2016.12.01-dual.iso, install with btrfs and switch to openrc instead of systemd
Process is painful... an easier way would be to use archbang Linux...

====== Hardware ======
I enhanced the almighty Thinkpad with a Crucial M4 mSATA Drive of 256GB
I intend to put the system on this SSD and home, swap and /var on the spinning 500GB disk :) like so:
====== Partition table ======
^Disk^Partition^Name^Label^Size^Format^Comment^
|SSD|1|sdb1|ARCHROOT|256+GB|BTRF| / for Archlinux |
|HD|1|sda1|SWAP|32GB|Linux Swap|swap for Linux|
|HD|2|sda2|VAR|50GB|BTRFS|/var for Linux|
|HD|3|sda3|HOME|389GB|NTRFS|/home for Linux|

Simple :-)
====== Base install ======
===== References =====
  * [[https://wiki.archlinux.org/index.php/Installation_Guide|Installation guide]]
  * [[https://wiki.archlinux.org/index.php/ThinkPad_X230|Thinkpad x230]]

===== ssh root login =====
ssh root login is already allowed
grab the ip
<code bash>
ip addr show
</code>
Start sshd
<code bash>
systemctl start sshd
</code>
change root passwd
<code bash>
passwd
</code>
Now you can connect remotely from another host
set the partition using cfdisk like displayed in the table above
==== Formatting ====
Let's format all these partitions in btrfs/swap format with LABELS!!.
<code bash>
mkfs.btrfs -L ARCHROOT /dev/sdb1
mkfs.btrfs -L ARCHVAR /dev/sda2
mkfs.btrfs -L ARCHHOME /dev/sda3
mkswap -L SWAP /dev/sda1
</code>
===== Mount partitions=====
<code bash>
mkdir /mnt/{home,var}
mount /dev/sdb1 /mnt
mount /dev/sda2 /mnt/var
mount /dev/sda3 /mnt/home
swapon /dev/sda1
</code>

Check all is fine:
<code bash>
mount
</code>
Thank you systemd for this horrible output....
===== Base system =====
Then install base packages plus base-devel packages
<code bash>
pacstrap /mnt base base-devel
</code>
===== Fstab =====
For SSD tweaks and to make it shine: [[https://wiki.archlinux.org/index.php/Solid_State_Drives|SSD]]
  * generate fstab
<code bash>genfstab -L -p /mnt >> /mnt/etc/fstab
</code>
Yes I use Labels, UUID sucks
  * check fstab for options and label in place (for me it did a good job)

===== Bootloader =====
I use Syslinux since it does its job well and didn't fall into useless overkill configuration files and tools! [[https://wiki.archlinux.org/index.php/Syslinux|Syslinux]]
<code bash>
pacstrap /mnt syslinux
</code>
====== Configuration ======
===== Environment =====
Let's go to our new system!
<code bash>arch-chroot /mnt </code>
  * /etc/hostname
<code bash> echo 30L3 > /etc/hostname </code>
  * /etc/locale.gen
I'll use en_US.utf-8/iso8859 so uncomment:
<code>
en_US.UTF-8 UTF-8
en_US ISO-8859-1
</code>
The generate locales
<code bash> locale-gen </code>
  * /etc/locale.conf [[https://wiki.archlinux.org/index.php/Locale|Locale]]
<code bash>
LANG="en_US.UTF-8"

# Keep the default sort order (e.g. files starting with a '.'
# should appear at the start of a directory listing.)
LC_COLLATE="C"
</code>
  * /etc/vconsole.conf 
Default keyboard in console (US variant international ... with a different mapping than on X11! Well done)
<code bash>echo "KEYMAP=us-acentos" > /etc/vconsole.conf</code>
  * /etc/localtime
<code bash>ln -s /usr/share/zoneinfo/Europe/Paris /etc/localtime</code>
  * /etc/mkinitcpio.conf
Double check the content,
then just regenerate it in case ...
<code bash>mkinitcpio -p linux</code>
got scary:
<code bash>
==> ERROR: file not found: `fsck.btrfs'
==> WARNING: No fsck helpers found. fsck will not be run on boot.
</code>
  * /boot/syslinux/syslinux.cfg 
I left it by default (for now ;-) ) WARNING: No fsck helpers found. fsck will not be run on boot.\\
:!: Check that Linux start from /dev/sdb1 not sdaX ... 
Then the magic:
<code bash> /usr/sbin/syslinux-install_update -i -a -m</code>
output:
<code bash>
Syslinux BIOS install successful
Attribute Legacy Bios Bootable Set - /dev/sdb1
Installed MBR (/usr/lib/syslinux/bios/gptmbr.bin) to /dev/sdb
</code>
if errors, install gptfdisk package or what's required :)
  * root password
<code bash>passwd</code>
===== Reboot=====
==== Umount stuff cleanly ====
First use Ctrl+D to escape from the chroot\\
then:
<code bash>umount /mnt/var /mnt/home /mnt</code>
Now is the time to light a candle and type
<code bash>reboot</code>

===== SSHd =====
Access remotely:
<code bash> pacman -Sy openssh </code>
Enable it at boot
===== User =====
<code bash>
useradd -g users -m -s /bin/bash warnaud
passwd warnaud
</code>
use **visudo** to set appropriate rights for the user
===== Install some X=====
 pacman -S xorg-server xorg-apps xorg-fonts xorg-fonts-100dpi xorg-fonts-75dpi xorg-twm xorg-xclock xorg-xinit xorg-xdm xterm xf86-video-intel xorg-xmessage xorg-xcalc xorg-xfontsel xorg-utils vim
We have intel video card so we need to add some modules at boot for KMS
<code bash>
vi /etc/mkinitcpio.conf
</code>
<code>
...
MODULES="i915"
...
</code>
Acceleration method
<code>vi /etc/X11/xorg.conf.d/20-intel.conf</code>
<code>
Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod"  "sna"
EndSection
</code>
<code> vi /etc/X11/xorg.conf.d/10-evdev.conf </code>
<code bash>
Section "InputClass"
        Identifier "evdev keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
        Option "XkbLayout" "us"
        Option "XkbVariant" "intl"
EndSection
</code> 
==== XDM ====
Reference: [[https://wiki.archlinux.org/index.php/XDM]]
<code bash>pacman -S xorg-xdm</code>
Enable systemd service
<code bash>systemctl enable xdm.service</code>


==== i915 ====
Power consumption for Intel Graphics:
<code bash>vi /etc/modprobe.d/modprobe.conf</code>
<code bash>options i915 i915_enable_rc6=1 i915_enable_fbc=1 lvds_downclock=1</code>
Rebuild the kernel:
<code bash>mkinitcpio -p linux && mkinitcpio -p linux-ck</code>

===== Thinkpad =====
==== Wacom ====
Reference: [[https://wiki.archlinux.org/index.php/Wacom]]
Install the driver:
<code bash>pacman -S xf86-input-wacom</code>
FIXME la suite ...
==== Disable Touchpad ====
Deactivate the useless touchpad:
<code> vi /etc/X11/xorg.conf.d/10-evdev.conf </code>
<code bash>
Section "InputClass"
        Identifier "evdev touchpad catchall"
        MatchIsTouchpad "off"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection
</code>

FIXME Check alternate solution:[[https://wiki.archlinux.org/index.php/Synaptics_Touchpad]] 
==== TrackNav enhancement ====
This hack will enable scrolling using the middle button + the TrackPoint™®©
<code bash>vi /etc/X11/xorg.conf.d/20-thinkpad.conf</code>
<code bash>
Section "InputClass"
    Identifier	"Trackpoint Wheel Emulation"
    MatchProduct	    "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device"
    MatchDevicePath	    "/dev/input/event*"
    Option		    "EmulateWheel"        "true"
    Option		    "EmulateWheelButton"  "2"
    Option		    "Emulate3Buttons"	  "false"
    Option		    "XAxisMapping"	  "6 7"
    Option		    "YAxisMapping"        "4 5"
EndSection
</code>
===== Other software =====
==== Archlinuxfr repository ====
We need yaourt to install a bunch of aur packages for openrc
<code bash>vi /etc/pacman.conf</code>
<code bash>
...
[archlinuxfr]
SigLevel = Never
Server = http://repo.archlinux.fr/$arch
</code>
\o/ No signature
==== Sudo ====
<code bash>pacman -S sudo</code>
<code bash>visudo</code>
<code bash>
...
root ALL=(ALL) ALL
someuser ALL=(ALL) ALL</code>
Just add the 'someuser' line and change by the user you need

==== Compilation options =====
:!: just for fun not really mandatory
Reference: [[https://wiki.archlinux.org/index.php/Makepkg.conf]]
<code bash>vi /etc/makepkg.conf</code>
Modify CFLAGS/CXXFLAGS:
<code bash>
# -march=native also sets the correct -mtune=
CFLAGS="-march=native -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2"
CXXFLAGS="${CFLAGS}"
</code>
Modify MAKEFLAGS (4 = output of nproc)
<code bash>MAKEFLAGS="-j4"</code>
:!::!::!::!::!::!: WORK IN PROGRESS :!::!::!::!::!::!::!::!:
==== Switch to openrc =====
bye bye systemd!
<code bash>
yaourt -S openrc-sysvinit
</code>
This will install sysvinit also.
This will conflict with systemd crap, remove it:
<code bash>
Remove systemd-sysvcompat? [y/N] y

 yaourt -S openrc
</code>
use openrc-git to be super bleeding edge :)
</code>
Next, install some arch services + network service tools
<code bash>
 yaourt -S openrc-arch-services-git net-tools

</code>
===== openrc & bootloader =====
I use syslinux, the trick is to add init=/usr/bin/init-openrc to the kernel parameters of your bootloader configuration file
for me on **/boot/syslinux/syslinux.cfg**:
<code>
LABEL arch-ck
        MENU LABEL Arch Linux CK
        LINUX ../vmlinuz-linux-ck-ivybridge
        APPEND root=/dev/sdb1 ro resume=/dev/sda1 vga=792 init=/usr/bin/init-openrc
        INITRD ../initramfs-linux-ck-ivybridge.img quiet vga=current ipv6.disable=1 elevator=bfq pcie_aspm=force acpi_backlight=vendor

</code>
After a reboot, systemd is gone LOL

===== recommended services =====
<code bash>
rc-update add udev sysinit
rc-update add dcron default
rc-update add dbus default
rc-update add alsa default
rc-update add syslog-ng default
</code>
Then it is safe to reboot ;)

Nightmare after reboot, first xdm do not work/start... second network card naming is the same as systemd...

====== References ======
  * https://wiki.archlinux.org/index.php/OpenRC
  * https://blog.notfoss.com/posts/openrc-on-arch-linux/
  * https://github.com/throwawaygh/arch-openrc-guide
  * [[os:archlinux:30l3|Overview]] my previous install
# rc-update add dcron default