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SubjectRe: ACPI regression in 2.6.25-rc6 (function keys stop working)
Hi Alexey,

Thanks for your assistance. Here are the results of various tests:

=== vanilla:
CPU0
0: 14637 IO-APIC-edge timer
1: 213 IO-APIC-edge i8042
3: 2 IO-APIC-edge
8: 1 IO-APIC-edge rtc
9: 318 IO-APIC-fasteoi acpi
12: 3534 IO-APIC-edge i8042
14: 12481 IO-APIC-edge ata_piix
15: 0 IO-APIC-edge ata_piix
16: 14609 IO-APIC-fasteoi uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
17: 5681 IO-APIC-fasteoi yenta, ipw2200, Intel ICH6
18: 0 IO-APIC-fasteoi uhci_hcd:usb4, sdhc0:slot0, eth0
19: 0 IO-APIC-fasteoi uhci_hcd:usb3
20: 0 IO-APIC-fasteoi Intel ICH6 Modem
23: 4 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
NMI: 0 Non-maskable interrupts
LOC: 22742 Local timer interrupts
TRM: 0 Thermal event interrupts
SPU: 0 Spurious interrupts
ERR: 0
MIS: 0

ACPI keys don't work at all

=== 2c81ce4c9c3 reverted:

CPU0
0: 13379 IO-APIC-edge timer
1: 205 IO-APIC-edge i8042
3: 2 IO-APIC-edge
8: 1 IO-APIC-edge rtc
9: 3599 IO-APIC-fasteoi acpi
12: 3654 IO-APIC-edge i8042
14: 13034 IO-APIC-edge ata_piix
15: 0 IO-APIC-edge ata_piix
16: 14073 IO-APIC-fasteoi uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
17: 7855 IO-APIC-fasteoi yenta, ipw2200, Intel ICH6
18: 0 IO-APIC-fasteoi uhci_hcd:usb4, eth0, sdhc0:slot0
19: 0 IO-APIC-fasteoi uhci_hcd:usb3
20: 0 IO-APIC-fasteoi Intel ICH6 Modem
23: 4 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
NMI: 0 Non-maskable interrupts
LOC: 22153 Local timer interrupts
TRM: 0 Thermal event interrupts
SPU: 0 Spurious interrupts
ERR: 0
MIS: 0

ACPI keys work fine.

=== 2c81ce4c9c3 reverted + call_psw_on_capable_devices.patch

CPU0
0: 12372 IO-APIC-edge timer
1: 195 IO-APIC-edge i8042
3: 2 IO-APIC-edge
8: 1 IO-APIC-edge rtc
9: 7976 IO-APIC-fasteoi acpi
12: 1824 IO-APIC-edge i8042
14: 12168 IO-APIC-edge ata_piix
15: 0 IO-APIC-edge ata_piix
16: 11829 IO-APIC-fasteoi uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
17: 4803 IO-APIC-fasteoi yenta, ipw2200, Intel ICH6
18: 0 IO-APIC-fasteoi uhci_hcd:usb4, sdhc0:slot0, eth0
19: 0 IO-APIC-fasteoi uhci_hcd:usb3
20: 0 IO-APIC-fasteoi Intel ICH6 Modem
23: 58 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
NMI: 0 Non-maskable interrupts
LOC: 21962 Local timer interrupts
TRM: 0 Thermal event interrupts
SPU: 0 Spurious interrupts
ERR: 0
MIS: 0

ACPI keys work fine.

=== dont_disable_ec_gpe_completely_at_storm.patch

CPU0
0: 19657 IO-APIC-edge timer
1: 434 IO-APIC-edge i8042
3: 2 IO-APIC-edge
8: 1 IO-APIC-edge rtc
9: 3310 IO-APIC-fasteoi acpi
12: 7224 IO-APIC-edge i8042
14: 13055 IO-APIC-edge ata_piix
15: 0 IO-APIC-edge ata_piix
16: 18637 IO-APIC-fasteoi uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
17: 7281 IO-APIC-fasteoi yenta, ipw2200, Intel ICH6
18: 0 IO-APIC-fasteoi uhci_hcd:usb4, eth0, sdhc0:slot0
19: 0 IO-APIC-fasteoi uhci_hcd:usb3
20: 0 IO-APIC-fasteoi Intel ICH6 Modem
23: 4 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
NMI: 0 Non-maskable interrupts
LOC: 26645 Local timer interrupts
TRM: 0 Thermal event interrupts
SPU: 0 Spurious interrupts
ERR: 0
MIS: 0

dmesg contains:
ACPI: EC: GPE storm detected, throttle EC GPE
ACPI: EC: missing write data confirmation, don't expect it any longer.

ACPI keys quite work but are very laggy (in the order of seconds).


Conclusion: I never experienced acpi interrupts flood in any case, in
vanilla the interrupt count is much lower but then there are no
interrupts even when I press acpi keys.
dont_disable_ec_gpe_completely_at_storm.patch does not correctly fix
the problem for me. When 2c81ce4c9c3 is reverted,
call_psw_on_capable_devices.patch makes no difference as it still
works well.

Thanks.

--
Guillaume


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