I was also affected by this on a HP Pavilion dv2000 series laptop (DV2637):
-------------
Jan 19 00:47:27 predtop kernel: [ 1333.064180] ACPI: EC: missing confirmations,
switch off interrupt mode.
Jan 19 00:47:27 predtop kernel: [ 1333.565119] ACPI Exception (evregion-0419):
AE_TIME, Returned by Handler for [EmbeddedControl] [20080609]
Jan 19 00:47:27 predtop kernel: [ 1333.565142] ACPI Error (psparse-0530):
Method parse/execution failed [\_TZ_.TZS0._TMP] (Node f7410d68), AE_TIME
--------------
So I installed the kernel you linked Andy. The Error hasn't shown up yet and I
noticed the following from around boot time:
----------------------------------
Jan 19 01:08:42 predtop kernel: [ 0.440305] ACPI: bus type pci registered
Jan 19 01:08:42 predtop kernel: [ 0.441049] ACPI: EC: Look up EC in DSDT
Jan 19 01:08:42 predtop kernel: [ 0.447409] ACPI: BIOS _OSI(Linux) query
ignored via DMI
Jan 19 01:08:42 predtop kernel: [ 0.450482] ACPI: Interpreter enabled
Jan 19 01:08:42 predtop kernel: [ 0.450487] ACPI: (supports S0 S3 S4 S5)
Jan 19 01:08:42 predtop kernel: [ 0.450495] ACPI: Using IOAPIC for interrupt
routing
Jan 19 01:08:42 predtop kernel: [ 0.450495] ACPI: EC: non-query interrupt
received, switching to interrupt mode
Jan 19 01:08:42 predtop kernel: [ 0.452053] ACPI: EC: GPE storm detected,
transactions will use polling mode
Jan 19 01:08:42 predtop kernel: [ 0.492310] ACPI: EC: GPE = 0x17, I/O:
command/status = 0x66, data = 0x62
Jan 19 01:08:42 predtop kernel: [ 0.492310] ACPI: EC: driver started in poll
mode
----------------------------------
Looks like the fix works as advertised :)
--
ACPI: EC: missing confirmations, switch off interrupt mode.
https://bugs.launchpad.net/bugs/284263
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