Ubuntu Manpage: nvram-wakeup - a (small) program that can read and write the WakeUp time in the BIOS.

NAME

       nvram-wakeup - a (small) program that can read and write the WakeUp time in the BIOS.

SYNOPSIS

       nvram-wakeup  [-l|--syslog]  [-D|--debug]  [-A|--directisa]  [-N|--nowrite] [-d|--disable]
       [-s|--settime  time]  [-C|--configfile  filename]  [-I|--iwname   string]   [-v|--version]
       [-h|--help]

DESCRIPTION

       nvram-wakeup is a (small) program that can read and write the WakeUp time in the BIOS (via
       /dev/nvram on kernels >= 2.4.6 or using direct I/O).  On this  WakeUp  time  the  computer
       will be powered on automatically from the soft-off state.

OPTIONS

If run without options, nvram-wakeup will read the current wakeup settings from the NVRAM
and print them on stdout.

-l, --syslog
This option will let nvram-wakeup log all output via syslogd to the system log
instead of stdout/stderr. This option should always be the first one.

-D, --debug
This option enables printing debug messages.

-A, --directisa
Use direct I/O port access to access the nvram instead of /dev/nvram. This option
must be used if the configuration option upper_method is set. The device /dev/rtc
is still used.

WARNING: If you use the option --directisa and some other programm tries to access
nvram and/or rtc at the same time, you might screw up all your nvram (i.e. all CMOS
settings).

-N, --nowrite
This option disables writing into the nvram and rtc devices. But all the values for
the bytes are calculated. Write them down and go set the same date/time via BIOS
Setup, run nvram-wakeup and see if the values you written down correspond to the
values set by the BIOS.

-s time, --settime=time
Specify the time on which the computer should be up and running. The time is
specified as a time_t value, i.e., number of seconds since epoch (Jan 1 1970,
00:00:00).

See EXAMPLES below on how to set a "human readable" wakeup time.

Set time to 0 to disable the wakeup feature.

You can specify multiple -s|--settime options on the command line, as far as they
all have the same time value. See EXAMPLES below.

-d, --disable
A synonym for --settime=0

-C filename, --configfile=filename
Read mainboard configuration from configuration file filename.

See nvram-wakeup.conf(5) for information on the syntax of the file.

See BOARD CONFIGURATION below for general information on getting board
configurations.

-I name, --iwname=name
If the DMI entries of your mainboard are broken, you may specify a DMI infowriter
name here. (it's the name of one of the functions from nvram-wakeup-mb.c)

If you specify --configfile as well as the --iwname option, then --iwname is
ignored.

See BOARD CONFIGURATION below for general information on getting board
configurations.

-w minutes, --wakeupbefore=minutes
Specify how many minutes before the programmed wakeuptime the computer should wake
up.

The default is to start 5 minutes before the programmed wakeup time.

-h, --help
Print a help message and exit.

-v, --version
Display version and author information.

BOARD CONFIGURATION

       By default, the mainboard is autodetected by reading DMI information from  the  BIOS.   If
       the DMI entries are broken, you can specify the name of the infowriter to be used with the
       --iwname option. This only works if the board configuration is aleready compiled into  the
       program.  The list of existing infowriters can be found in the source.

       Example:  On  my  Biostar  M6VCG  the whole DMI entry is broken (maybe a BIOS update would
       help, but I never tried it), but the configuration of the board  is  known,  so  only  the
       autodetection  doesn't  work.  Thus look up (in boards.yaml) the name of the infowriter to
       beused, which is 'bio_m6vcg' and call

              nvram-wakeup --iwname bio_m6vcg

       If  nvram-wakeup  doesn't  know  anything  about  your  board,  you  can  put  the   board
       configuration  into  a  file  and pass the file name via the --configfile option to nvram-
       wakeup.  Look nvram-wakeup.conf(5) for more information on the configuration file syntax.

       If you specify --configfile as well as the --iwname option, then --iwname is ignored.

EXAMPLES

       You can specify multiple -d or -s options at the command line,  but they must specify  the
       same time, e.g.

              nvram-wakeup --settime=0 -s0 -s 0 -d -ddds0  # is O.K.
              nvram-wakeup -s1002722247 -s1002722247       # is O.K.
              nvram-wakeup -s1002722247 -s1002722248       # is not O.K.
              nvram-wakeup -s1002722247 --disable          # is not O.K.

       If you want the machine to be up and running in 20 minutes, call

              nvram-wakeup -s $((`date +%s` + 20 * 60))

       If you want the machine to be up and running at 18:30 today, call

              nvram-wakeup -s `date +%s -d "18:30"`

       Note  that  this is really "today" so if you run this after 18:30, the time will be in the
       past.

       If you want the machine to be up and running on a particular day, at  a  particular  time,
       say at 18:30 on Apr. 23rd, call

              nvram-wakeup -s `date +%s -d "Apr 23 18:30"`

       For "tomorrow" you can use something like that:

              nvram-wakeup -s $((`date +%s -d "18:30"` + 60*60*24))

EXIT STATUS

       0      Successful program execution. The new date and time were set successfully.

       1      Successful program execution. The computer must be rebooted for the changes to take
              effect.

       2      An error occured. Something went wrong.

FILES

       /dev/nvram
              NVRAM character device. This one is used for reading/writing the  nvram  values  if
              the command line option --directisa is not used.

       /dev/rtc
              RTC  character  device.  This  one is used to determine if the RTC clock is running
              localtime or UTC/GMT. Furthermore, some motherboards use the RTC alarm time for the
              wakeup feature.

       /dev/mem
              Memory  character  device.  This  one  is  used  to  get  DMI information for board
              autodetection.

       nvram-wakeup.conf
              Configuration file  for  a  mainboard  not  supported  out-of-the-box.  See  nvram-
              wakeup.conf(5) for information on the syntax of the file.

HOMEPAGE

       http://sf.net/projects/nvram-wakeup/

AUTHOR

       Written by Sergei Haller <Sergei.Haller@math.uni-giessen.de>.

REPORTING BUGS

       Report bugs at the bug tracking system (see HOMEPAGE) or on the mailing list nvram-wakeup-
       devel@lists.sourceforge.net

COPYRIGHT

       Copyright © 2001-2004 Sergei Haller.

       This program is free software; you can redistribute it and/or modify it under the terms of
       the  GNU  General  Public  License  as  published  by the Free Software Foundation; either
       version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY  WARRANTY;
       without  even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program;
       if  not,  write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
       MA  02111-1307  USA