Ken Teh wrote:
> cpuspeed was off.  If I say 'shutdown -h now', the machines powers off 
> after a clean shutdown.  If I say 'shutdown -r now', it brings the 
> machine down.  The last steps are remounting md0 readonly and syncing 
> the SATA drives.  The last line it prints on the screen is 'Restarting 
> system'.  Then, it just sits there.  I have to use the front-panel 
> switch to turn it off, then power it back on.  Which is a bummer if 
> you have to reboot it remotely. Btw, the front-panel switch is one of 
> these new types when you have to hold it down for several seconds 
> before it actually powers the machine off.
>
> I'm wondering if it's some hardware problem.  It's my understanding 
> that a restart is basically like a push button reset.  The last thing 
> the CPU does is pull the reset line (A20 or A21 ??) which causes the 
> M/B to go through its boot-up.  But, now with ACPI and these smart 
> power supplies, I was wondering if somehow this is the cause of my 
> problem.
>
> Any other suggestions?

I suspect this is an ACPI or chipset support problem which has been 
fixed in a later kernel. I have a couple of computers with the same ASUS 
M2NPV-VM motherboard (BIOS version 0801) and halting and rebooting works 
fine under CentOS 5.0 but hangs under CentOS 4.3.  However, under CentOS 
4.3, if I add acpi=off to the kernel boot command line, reboot works but 
not halt.

Shannon


> Ken
>
>
> Dan Halbert wrote:
>> Ken Teh wrote:
>>> I just installed SL4.4 on an Athlon 64 machine with a ASUS M2NPV-VM 
>>> motherboard.  Shutdown works.  The machine powers off.  But, restart 
>>> freezes.  Bad hardware or is it some new-fangled power on/off/reset 
>>> standard the hardware folks are foisting on us?
>>>
>> Do you mean that a cold boot (from power off) works, but a warm 
>> reboot doesn't? Try turning off cpuspeed:
>>  # service cpuspeed off
>> and then try again (starting with a cold boot). We saw this with an 
>> Opteron board.
>>
>> Dan
>>
>

-- 
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Shannon V. Davidson <[log in to unmask]>
Senior Software Engineer               Appro
636-633-0380 (office)     443-383-0331 (fax)
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