James Wilkinson said the following on 31/08/2005 18:49:
Antonio Montagnani wrote:
Does specifying acpi=ht on the SMP kernel command line make any
difference? It probably defeats the purpose of SMP.
and:
and furthermore prevents from poweroff .... :-(
Shouldn't do. In general, one doesn't need ACPI for SMP.
You probably don't, either. You can check /proc/cpuinfo: it should show
two CPUs if you've got SMP working.
acpi=ht turns ACPI off for most things, but keeps enough to enable
hyperthreading. It sounds like there's a bug somewhere in ACPI (probably
in your motherboard support).
I agree, I have seen many warnings saying that can't load ACPI table,
etc, etc, untill I put acpi=ht, and same errors are also on standar
kernel (pls. have a look to the part of /var/log/messages already posted)
Stupid idea: I forget whether your Ethenet card is built-in or a
physical card. If it's physically separate, try it in different PCI
slots. That should get it different PCI level IRQs: the ACPI IRQ routing
might work for a different PCI IRQ.
It is a separate card, I will switch to a different slot, when I have
some spare time, but this should not remove all warning/errors about
ACPI, should it?
As for the poweroff, you need APM or ACPI for this to work. APM doesn't
work in SMP mode (there's a line in the kernel messages you posted
saying as much), and you've just turned off ACPI for nearly everything.
You will probably have turned off hibernation support and *possibly*
some power-saving support when you disabled ACPI.
no idea how I could have disabled any flag to disable poweroff, any
suggestion?
Otherwise, you really
don't need it unless you've got *really* unusual kit.[1]
James.
[1] I think some Itanium servers rely on it...
--
Antonio
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