~/.pam_environment

  1. Open "~/.pam_environment",
    LANGUAGE=ja_JP:zh_CN:en
    LANG=ja_JP.UTF-8
    LC_NUMERIC=ja_JP.UTF-8
    LC_TIME=ja_JP.UTF-8
    LC_MONETARY=ja_JP.UTF-8
    LC_PAPER=ja_JP.UTF-8
    LC_NAME=ja_JP.UTF-8
    LC_ADDRESS=ja_JP.UTF-8
    LC_TELEPHONE=ja_JP.UTF-8
    LC_MEASUREMENT=ja_JP.UTF-8
    LC_IDENTIFICATION=ja_JP.UTF-8
  2. wtf? "zh_CN"?
  3. I edited "LANGUAGE" line to,
    LANGUAGE=ja_JP:en
    

Screen freezed at "Checking battery state..." at startup of ubuntu 12.10.

  1. Open "/etc/default/grub" file.
    $ sudo vi /etc/default/grub
    
    Edit "GRUB_CMDLINE_LINUX_DEFAULT" like this,
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash console=tty1"
    
  2. Update grub settings.
    $ sudo update-grub
    
  3. Reboot system.
see also: http://ubuntuforums.org/showthread.php?t=1860674
see also: http://steadyassimilation.blogspot.jp/2012/04/note-ubuntu-1204lts.html