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    1: If you have ATX hardware, for various reasons, you might want your box to poweroff by itself when you shut it down. To achieve this you have to enable [apm(8)](http://netbsd.gw.com/cgi-bin/man-cgi?apm+8+NetBSD-current) in the kernel. Here's how to do it: 
    2: 
    3: **Contents**
    4: 
    5: [[!toc]]
    6: 
    7: #  Obtaining the Sources 
    8: 
    9: If you are running 3.0, you can get the Sources from the NetBSD FTP Server or from a [Mirror](Get BSD) close to you. If you are running current, you should check out the Sources from a CVS Mirror close to you. 
   10:     
   11: 
   12:     # cd /
   13:     # ftp ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-3.0/source/sets/syssrc.tgz
   14:     # tar -zxf syssrc.tgz
   15:     
   16: 
   17: #  Configure the kernel 
   18: 
   19: Edit the file `/usr/src/sys/arch/i386/conf` and uncomment _apm_ to enable APM, it should look like: 
   20:     
   21:     apm0	at mainbus0			# Advanced power management
   22:     
   23: 
   24: Alternatetively, you might want to customize (uncomment) these options: 
   25:     
   26:     # Tuning for power management, see apm(4) for more details.
   27:     #options        APM_NO_IDLE             # Don't call BIOS CPU idle function
   28:     #options        APM_V10_ONLY            # Use only the APM 1.0 calls
   29:     #options        APM_NO_POWEROFF         # Don't power off on halt(8)
   30:     #options        APM_POWER_PRINT         # Print stats on the console
   31:     #options        APM_DISABLE_INTERRUPTS=0 # Don't disable interrupts
   32:     
   33: 
   34: #  Build the kernel 
   35:     
   36:     # config GENERIC_APM
   37:     # cd ../compile/GENERIC_APM
   38:     # make depend; make
   39:     
   40: 
   41: If everything went OK, your new APM-enabled-kernel should be located in ./netbsd 
   42: 
   43: #  Install the kernel 
   44:     
   45:     # mv /netbsd /netbsd.old
   46:     # cp netbsd /
   47:     # shutdown -r now
   48:     
   49: 
   50: Now when you shutdown the box it should poweroff by itself, without the need for the power button to be pressed. 
   51: 
   52: #  Troubleshooting 
   53: 
   54: If something went wrong, test with [apm(8)](http://netbsd.gw.com/cgi-bin/man-cgi?apm+8+NetBSD-current). Sample output: 
   55:     
   56: 
   57:     root@antfarm:~# apm
   58:     Battery charge state: absent
   59:     Battery remaining: 0 percent (0 minutes)
   60:     A/C adapter state: connected
   61:     Power management enabled
   62:     
   63: 
   64: ##  apmd
   65: 
   66: You will need the apm Daemon _apmd_ running for setting your Notebook fall into sleep. For that please add: 
   67:     
   68:     apmd=yes
   69:     
   70: 
   71: to your /etc/rc.conf Also see [apmd(8)](http://netbsd.gw.com/cgi-bin/man-cgi?apmd+8+NetBSD-current) for more power management issues.