APC SU1400XLT User Manual download pdf (Page 31)

This is not the normal behavior of most computers as shipped from the factory. Normally after the power is

cut and restored, you must explicitly press a button for the power to actually be turned on. You can test

your computer by powering it down; shutting off the power (pull the plug); then plugging the cord back in. If

your computer immediately starts up, good. There is nothing more to do.

If your computer does not start up, manually turn on the power (by pressing the power on button) and

enter your computer's SETUP program (often by pressing DEL during the power up sequence; sometimes

by pressing F10). You must then find and change the appropriate configuration parameter to permit

instant power on.

Normally, this is located under the BOOT menu item, and will be called something such as Restore on

AC/Power Loss or Full-On. The exact words will vary according to the ROM BIOS provider. Generally

you will have three options: Last State, Power On, and Power Off. Although Last State should

normally work, we recommend setting your computers to Power On. This means that whenever the

power is applied they are on. The only way to shut them off is to pull the plug or to have a special program

that powers them off (/sbin/poweroff on Linux systems).

If after making all the changes suggested above, you cannot get your computer to automatically reboot,

you might examine your halt script (/etc/rc.d/init.d/halt in the case of Red Hat Linux) and see if the final

line that performs the halt or reboot contains the -p option for powering down the computer. It should not

with the logic used by apcupsd, but if it does, the -p option could cause your computer to power off while

the UPS is still suppling power (i.e. before the UPS kills the power). Depending on the setting of your

BIOS, it may prevent your computer from restarting when the power returns. As already mentioned, this

should not apply, but in case of problems it is worth a try.

Making sure apcupsd Is Running

The simplest way to invoke apcupsd is from the command line by entering:

/sbin/apcupsd

To do so, you must be root. However, normally, you will want apcupsd started automatically when your

system boots. On some systems with installation support (e.g. SUSE and Red Hat), the installation

procedure will create a script file that you will be automatically invoked when your system reboots. On

other systems, you will have to invoke apcupsd from your rc.local script.

On Red Hat systems, this script file that automatically invokes apcupsd on system start and stops is

/etc/rc.d/init.d/apcupsd

To start apcupsd manually (as you will probably do immediately following the installation), enter the

following:

/etc/rc.d/init.d/apcupsd start

To understand how this file is automatically invoked at system startup and shutdown, see the man pages

for chkconfig(8).

On SUSE systems, the script file that automatically invokes apcupsd on system start and stops is

/etc/rc.d/apcupsd.

To start apcupsd manually (as you will probably do immediately following the installation), enter the

following:

/etc/rc.d/apcupsd start

Normally, when properly installed, apcupsd will be started and stopped automatically by your system.

Unfortunately, the details are different for each system. Below, we give the commands for selected

systems. Alternatively, there are simple stopapcupsd and startapcupsd scripts in the examples directory,

or you can modify one of the scripts in the distributions directory to meet your needs.

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APC SU1400XLT User Manual Page 31

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