[CentOS] ACPI reboot-issue (CentOS 4)
Simen Thoresen
simentt at dolphinics.no
Fri Feb 29 12:27:16 UTC 2008
Rudi Ahlers wrote:
> Simen Thoresen wrote:
>> 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
>>
>>
> aah, I was thinking about "shutdow -r now"
>
> Try "reboot -f " ?
That did a 'halt' without a shutdown - power still on, X not terminated,
system halted - no reboot tho.
This is fun, isn't it? :-)
-S
> [root at gimbli ~]# reboot --help
> usage: reboot [-n] [-w] [-d] [-f] [-h] [-i]
> -n: don't sync before halting the system
> -w: only write a wtmp reboot record and exit.
> -d: don't write a wtmp record.
> -f: force halt/reboot, don't call shutdown.
> -h: put harddisks in standby mode.
> -i: shut down all network interfaces.
>
>
--
Simen Thoresen - Dolphin ICS Systems Administrator
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