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.
I am sorry, cpuspeed was my one suggestion. But in the problem we had,
and on our motherboards, a pushbutton reset did NOT seem to be exactly
the same as a warm reboot. It seems like the pushbutton reset cleared
more state than the warm reboot. cpuspeed caused us to hang up much
later in the boot, when the daemons (including cpuspeed) were starting.
If we then pressed reset, the reboot was successful. So we ended up with
a worked-once/failed-once kind of toggling.
You might try turning off any ACPI stuff in the BIOS. But I am grasping
at straws.
