[CentOS] ACPI reboot-issue (CentOS 4)

[Simen Thoresen]

Simen Thoresen wrote:
> Rudi Ahlers wrote:
>> Simen Thoresen wrote:
>>> Hi all,
>>>
>>> I'm trying to troubleshoot my way thru a ACPI-issue on several 
>>> machines with the Asus P5N32-E SLI motherboard (S775, Nvidia 680i 
>>> chipset)
>>> http://www.asus.com/products.aspx?l1=3&l2=11&l3=397&l4=0&model=1459&modelmenu=1 
>>>
>>>
>>> This is CentOS 4 x86_64, and appears on all tested kernels, including 
>>> kernel-smp-2.6.9-67.0.4.EL
>>>
>>> My symptoms are that the machine won't reboot on the reboot command. 
>>> 'poweroff' does turn the power off and halt halts the system (without 
>>> turning the power off), but reboot effectively does a 'halt'.
>>>
>>> I can 'fix' this by giving the 'acpi=off' parameter to the kernel in 
>>> grub, but this causes other problems (some of these machines have 
>>> quad-core CPUs, and these require ACPI to initialize 3 of the cores. 
>>> The dual-core CPU-machines work with acpi=off.
>>>
>>> With acpi=off, reboot works as it is supposed to.
>>>
>>> I think the root of this issue is the Asus BIOS - we also have 
>>> several Asus M2N-SLI Deluxe (Athlon64, Nvidia 570 chipset) systems 
>>> that started exhibiting the same symptom after a BIOS upgrade. On 
>>> these acpi=off does not cause other problems, so this is no issue for 
>>> us now.
>>>
>>> Any suggestions? I think I understand that turning ACPI off basically 
>>> turns APM on, and that APM reboot works. Is there a way to do reboot 
>>> with APM instead of ACPI?
>>>
>>> Yours,
>>> -S
>> What does "poweroff now -r" do?
>>
> 
> Nothing.
> 
> [root at jelen-10 ~]# poweroff now -r
> usage: poweroff [-n] [-w] [-d] [-f] [-i] [-p]
>                   -n: don't sync before poweroffing the system

> ...but poweroff -f killed power (immediately, apparently)
> 
> and poweroff -p caused a normal poweroff (ie with shutdown)
> 

...and 'shutdown -r now' did the same as 'reboot' - ie 'halt' without 
poweroff.

-S


-- 
Simen Thoresen - Dolphin ICS Systems Administrator