"ACPI: EC: missing confirmations, switch off interrupt mode" wastes time on startup

[Corrado Zoccolo]

Hi,
I found that on my netbook (acer aspire one 110), kernel boot time
(kernel 2.6.29) is severely affected by the EC boot procedure, since
it is first fooled by a spurious interrupt in thinking that interrupts
work, and then gets a timeout waiting for an interrupt that never
arrives:
[    0.351161] calling  acpi_init+0x0/0x236 @ 1
[    0.361052] ACPI: EC: Look up EC in DSDT
[    0.367754] ACPI: BIOS _OSI(Linux) query ignored
[    0.368984] ACPI: EC: non-query interrupt received, switching to
interrupt mode
[    0.860013] ACPI: EC: missing confirmations, switch off interrupt mode.
[    0.866062] ACPI: Interpreter enabled

There is a bug report for this issue
http://bugzilla.kernel.org/show_bug.cgi?id=12001 ,  marked as fixed on
an old kernel, but I'm still getting it with 2.6.29 (maybe my
controller is flaky?), so I'm looking for a workaround: is there a way
to force the ACPI using polling?

-- 
__________________________________________________________________________

dott. Corrado Zoccolo                          mailto:czoccolo@xxxxxxxxx
PhD - Department of Computer Science - University of Pisa, Italy
--------------------------------------------------------------------------
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/