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?

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
>