Rebooting but not halting.  Well, that's a bummer, too. :)
But, thanks much.  I'll verify this is the case with this machine and 
then decide what to do next.

I was a faithful user of ASUS motherboards until very recently when they 
started using Marvell LAN chips and I had to add 3COM NIC cards so that 
my NFS installs work.  I switched to using Intel MB's but so far the 
verdict is still out.  Out of 3 systems, I've had one bad one.  What MBs 
are folks using nowadays?  I could use big outfits like Dell, but I 
prefer using local vendors to assemble machines for me.  By local, I 
mean really local, like 5 miles away so I can beat on their doors when I 
need something done quick.

Thanks again!  Ken


Shannon V. Davidson wrote:
> 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
>>>
>>
>