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