Bug 91344 - SMP machine doesn't power off when told to.
SMP machine doesn't power off when told to.
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brian Brock
Depends On:
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Reported: 2003-05-21 13:21 EDT by Fredrik Rambris
Modified: 2007-04-18 12:53 EDT (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2003-06-08 09:16:47 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Fredrik Rambris 2003-05-21 13:21:05 EDT
Description of problem:
When selecting power off in either desktop or gdm the machine goes all the way
to the disk flush and sais powering down but it doesn't.

Version-Release number of selected component (if applicable):
All kernels shipped with RHL 9.

How reproducible:
I can't say for sure but I have an ABIT BP6 mobo with two PIII CPUs.

Steps to Reproduce:
1. Install ABIT BP6 mobo
2. Install RHL9 or RHL8
3. Try to power off with SMP kernel.
Actual results:

Expected results:

Additional info:
The cure for this is simple on my machine. I add an apm=power-off to the kernel
parameters and it works.

I have the same problem on my Fujitsu-Siemens Lifebook E7010 (i815 chipset, P4)
but the apm=power-off doesn't help there.
Comment 1 Arjan van de Ven 2003-05-22 05:29:08 EDT
"The cure for this is simple on my machine. I add an apm=power-off to the kernel
parameters and it works."

Since this crashes on a huge part of the machines out there we can't make this
the default unfortionatly.

On your laptop, does dmesg show that APM is enabled AT ALL ?
Comment 2 Fredrik Rambris 2003-05-22 17:45:22 EDT
dmesg | grep -i apm sais
apm: BIOS version 1.2 Flags 0x1b (Driver version 1.16)
Comment 3 Fredrik Rambris 2003-05-22 18:09:48 EDT
Just to clarify. The laptop bug should be separate from the SMP bug as the
laptop isn't a SMP machine.

I managed to get the laptop to power down. I found no power management in bios
on machine and figured that it must be ACPI only. I recompiled the kernel with
no APM and all ACPI and the machine powers down as expected.
Comment 4 Alan Cox 2003-06-08 09:16:47 EDT
The SMP one we can't fix. The laptop will resolve when ACPI is in a state we are
happy to ship it

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