Im having some random reboots and in my troublshooting came across this boot option. Ive tried both ways, apci=off seems to work better,but maybe thats chance.. . anybody know what one it is for sure? thanks

acpi.

For laptops there are two power managament schemes : apm (advanced power management) and acpi (can't remember what it stands for). One or other will be right for your laptop so turn one off and the other on. Most new laptops use acpi.

If you're not running on a laptop, I don't think it makes any difference.

Do you have an nforce chipset on your motherboard? I know their are some issues with nforce and random lockups/reboots. Passing the following parameters to the kernel at boot time seems to eliminate these random freezes for me:

noapic nolapic acpi=off pci=noacpi

thanks all. i dont have a notebook but a epia m with a nehemiah 1ghz processor. ivce come across some docs that mention problems with acpi.
mine seems to go in spurts.. now its locking up like crazy.. ill try thoise boot parameters thopugh as i say i have been using some of them.. ill try all those together and let you know. im using suse 9.0 and have read some stuff about acpi issues with this board, not sure of the chipset its a via board, probably via, thanks again

welp its running ok for about 24hrs but then some days it does.. heres my last boot.msg pertinant parts (i added all the acpi/apm switches to the boot)
it would be nice to utilize acpi or apm as im running this website/system under solar power and itd be great to have the system turn off hardrive when nobody's on the website for a while, and wake up on activity.. but at this point id be happy to not have reboots/lockups. anyhow, so far so good with these switches - thanks. i have acpi turned off everywhere in bios,so not sure about these acpi bios references.. (epia m mb, suse 9.0). at least (if not 100% solved yet) im pretty sure now i dont have a hardware problem.

<4> BIOS-e820: 000000001dff0000 - 000000001dff3000 (ACPI NVS)
<4> BIOS-e820: 000000001dff3000 - 000000001e000000 (ACPI data)
<4> BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
<5>533MB vmalloc/ioremap area available.
<5>0MB HIGHMEM available.
<5>479MB LOWMEM available.
<7>ACPI: have wakeup address 0xc0001000
<4>On node 0 totalpages: 122864
<4>zone(0): 4096 pages.
<4>zone(1): 118768 pages.
<4>zone(2): 0 pages.
<4>Building zonelist for node : 0
<4>Kernel command line: root=/dev/hda1 vga=0x317 desktop splash=silent pci=noacpi acpi=off apm=off