Problem
Crontab switches off pc at 23.00. PC is off for 6 hours.
At 05.00 in morning PC should be turned in and running. But Im trying to setup this, but no success.

If I restart BIOS then it can start pc by itself, if pc is shuted down by Linux ACPI BIOS doesn't start the pc.


Solution
Any solution is welcomed.
Thanks.


History for digging around
I have tried 2 methods how to startup my pc in 5.00 morning. The most realistic was to start it with BIOS. but there still are problems with ACPI, if ACPI switches pc off. Bios can not start it. If ACPI is off (in grub.conf acpi=off), computer by command poweroff is going to halt (System halted) but will NOT switch off.
So I need that pc switches off (without ACPI) still can not understand how to manage this.
If I restart BIOS then it can start pc by itself, if pc is shuted down by Linux ACPI BIOS doesn't start the pc.

Somebody knows/have solution for this?
Thanks.

I had a similar problem with my Shuttle ak31 v2 motherboard. First off, this motherboard must not handle ACPI correctly. Ever since FC2 I've had to use "acpi=off" in the grub.conf which disables ACPI in Linux, but everything worked fine (it uses APM instead) in FC2, FC3, FC4 and FC5. Once I upgraded to FC6, however, Fedora would no longer turn off the power on my PC when I shut it down. It would just stop, with the last message on the screen being "System halted.". After much googling I found this page, http://mandrivausers.org/index.php?showtopic=38210
which recommended adding "acpi=off apm=on apm=power-off" to the grub.conf. Since my acpi was already off, and I new my APM was already on I simply had to add "apm=power-off" to my grub.conf and now Linux will shut the power off on my PC after it shuts down!

My relevant grub.conf entry now looks like this:

title Fedora Core (2.6.19-1.2895.fc6)
root (hd0,1)
kernel /boot/vmlinuz-2.6.19-1.2895.fc6 ro root=/dev/hda2 selinux=0 vga=791 acpi=off apm=power-off elevator=anticipatory
initrd /boot/initrd-2.6.19-1.2895.fc6.img
savedefault

Hope this info helps.

hi jim,

I am having a similar problem, so all i have to do now is to append

this acpi=off apm=on apm=power-off to my /boot/grub/grub.conf

Hope it works for me. The box is a redhat 9

Redhat 9 is pretty old. It uses the 2.4 kernel whereas I'm using a 2.6 kernel, so I don't know if the options work the same. Anytime you're editing your grub.conf file it's a good idea to have a backup and to know how to restore it if it doesn't work. Additionally you could create a whole other kernel section in your grub.conf file just for testing new options.

One other thing to note, those options should be appended to your kernel line. In my post they may have wrapped, but your kernel line should look something like this:
"kernel /boot/vmlinuz-2.6.22.5-49.fc6 ro root=/dev/hda2 acpi=off apm=on apm=power-off"
Everything between the quotes is on one line.