From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040510 Description of problem: The poweroff command leaves the machine in a semi powered down state. It flushes the IDE disks, sounds like it shuts them off, then shuts off the display. However, everything else (fans, etc.) are still running and the power light remains on. Sometimes the reset button will restart the machine, at other times I have to use the switch on the power supply to turn the machine off. The power button definitely doesn't work in this state, no matter how long I hold it down for. In RH9 and earlier the apm=power_off option worked for me, but FC2 uses ACPI by default. I've tried adding the nolapic kernel option (as read elsewhere) but that seemed to have no effect. Let me know what other information I can supply. The MB is a Tyan S2460 and I'm running kernel-smp-2.6.6-1.435.2.3. BIOS version is 1.05 (latest). Version-Release number of selected component (if applicable): SysVinit-2.85-25 How reproducible: Always Steps to Reproduce: 1. poweroff 2. 3. Actual Results: The poweroff command leaves the machine in a semi powered down state. It flushes the IDE disks, sounds like it shuts them off, then shuts off the display. However, everything else (fans, etc.) are still running and the power light remains on. Sometimes the reset button will restart the machine, at other times I have to use the switch on the power supply to turn the machine off. The power button definitely doesn't work in this state, no matter how long I hold it down for. Expected Results: Machine should completely power down. Additional info:
I have a similar setup (TYAN MB S2460/Dual-CPU) and see the same problem with shutdown (which, I think, calls poweroff at the end). I have upgraded to kernel-smp-2.6.7-1.494.2.2. I haven't seen documentation on kernel options to try, so I haven't tried any. In FC1 (same system), the system would shutdown to the point where it would tell me to turn the power off, but it wouldn't try to poweroff on its own.
I get the same problem on my Dell Poweredge 300. Which is a Dual-CPU. This wasn't a problem on FC1. But since I replaced all my systems to FC2 this Dell is the only one which doesn't shutdown properly. I have a Dell Latitude D600, Compac 700M, and a Cicero which are running FC2 and they all work fine. I wonder if it's something to do with the SMP version?
This still happens also with: kernel-smp-2.6.5-1.358 kernel-smp-2.6.6-1.435.2.3 kernel-smp-2.6.7-1.494.2.2 kernel-smp-2.6.8-1.521
Maybe this problem is related to bug 132761
Problem seems to have disappeared at 2.6.9-1.3_FC2.