Archlinux on X220i

Archlinux on X220i

Disable Swap File & Zram

ZRAM

Type (use copy/paste):
sudo apt-get purge zram-config

Press Enter. Type your password when prompted; your password will remain entirely invisible, not even dots will show, this is normal.

b. Reboot your computer.

c. Now check whether the removal has succeeded, with the following terminal command:
cat /proc/swaps

Press Enter.

If all has gone well, you should receive no report anymore about one or more /dev/zram "partitions".

Reference :
http://www.phoronix.com/scan.php?page=news_item&px=MTM1NjQ
https://sites.google.com/site/easylinuxtipsproject/speed

How do I optimize the OS for SSDs

1. http://www.joeyconway.com/blog/2011/09/11/ubuntu-ssd-move-chrome-cache-to-ram/
2. http://web.archive.org/web/20090227063418/http://www.ubuntu-eee.com/wiki/index.php5?title=How_to:_Reduce_Disk_Writes_to_Prolong_the_Life_of_your_Flash_Drive
3. http://askubuntu.com/questions/1400/how-do-i-optimize-the-os-for-ssds
4. http://stevehanov.ca/blog/index.php?id=48

Power Management on X220i using TLP

Installing TLP
sudo pacman -S tlp tlp-rdw tp_smapi acpi_call acpid ethtool iw lsb-release smartmontools tp_smapi

Reference :
https://wiki.archlinux.org/index.php/TLP
https://wiki.archlinux.org/index.php/Tp_smapi

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i also found adding the following to my rc.local helped with a few powertop tunables (now they ALL read "good" every time!)
sleep 1
# Power aware CPU scheduler 
echo 1 > /sys/devices/system/cpu/sched_mc_power_savings
# Audio codec power management
echo 1 > /sys/module/snd_hda_intel/parameters/power_save
# VM writeback timeout
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
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General Reference :
http://www.williambrownstreet.net/blog/2011/11/battery-life-on-thinkpad-x220-i7-running-ubuntu-11-10/
http://abuseit.pl/Docs/HOWTO_Lenovo_X220_Linux_configuration.txt - Ubuntu
http://www.thinkwiki.org/wiki/Category:X220

/etc/fstab

'#Uncomment these after all server based applications installed - eg. apache
tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
tmpfs /var/tmp tmpfs defaults,noatime,mode=1777 0 0
tmpfs /var/log tmpfs defaults,noatime,mode=0755 0 0
tmpfs /var/log/apt tmpfs defaults,noatime 0 0
none /var/cache aufs dirs=/tmp:/var/cache=ro 0 0

http://superuser.com/questions/278396/systemd-does-not-run-etc-rc-local
http://blog.iopsl.com/rc-local-compatibility-in-arch-linux/