Tejun Heo wrote:
Jeff Garzik wrote:
Rich West wrote:
I was only curious as to what turning off power management support
would buy with regard to the sata timeout issue.
ACPI is not only power management. It is all the information your
hardware conveys to your OS, about the setup and workings of your
hardware.
Without ACPI, non-PM things like SMP, laptop dock/undock, and many
other gadgets fail to function (or are configured sub-optimally).
ACPI sets up interrupt routing, and Linux history is _loaded_ with
_years_ of problem reports that appear as timeouts, only to be
resolved as ACPI interrupt bugs (aka BIOS bugs, since ACPI tables
come from BIOS).
Also, please give a shot at the sacred "irqpoll".
I've had bad luck in the past (with other machiens) when adding
"irqpoll" in that it had locked up the entire machine (not this one, but
others) after a very short period of time. My only attempt at using it,
though, was to try to address an X server related issue, but this is a
non-user machine, so X isn't necessary, and, hence, it's at runlevel 3
all of the time.
So far, noapic and acpi=off seem to be working.. The system has been up
8 days without any problems.. previously, a problem with the SATA drive
(details of which were part of the first few messages in this thread)
would surface anywhere between 15 minutes and 5-7 days after a reboot.
However, since I started this email, I tried firing up X (with noapci
and acpi=off both set), the machine locks up entirely.
-Rich
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