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 >>> >> >