System freeze on modem ring; ACPI involved
Nate Eldredge
neldredge at math.ucsd.edu
Sun May 13 09:54:06 UTC 2007
Hi all,
I'm trying to chase down a problem whereby the system freezes briefly when
the modem rings. It is an external serial modem, and during the 2 seconds
that the phone is ringing, user processes do not run, though keystrokes
are echoed to the console. When the ring ends everything is back to
normal.
It appears that ACPI is related and I wonder if this is possibly a
"wake-on-ring" feature gone awry. Running top -S shows that three
processes called "acpi_task_[012]" accumulate cpu time during the ringing.
Also, booting with ACPI disabled makes the problem go away.
I recompiled with ACPI_DEBUG and found that during the ringing, it spews a
lot of messages like the following:
Execute Method: [\\_GPE._L0E] (Node 0xffffff0000940930)
[ACPI Debug] String: [0x4] "SIOH"
exregion-0378 [62] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [62] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2F
exregion-0378 [64] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [63] ExSystemIoSpaceHandler: SystemIO 0 (8 width) Address= 0 2F
exregion-0378 [64] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [63] ExSystemIoSpaceHandler: SystemIO 0 (8 width) Address= 0 2F
exregion-0378 [62] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [62] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2F
exregion-0378 [64] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [63] ExSystemIoSpaceHandler: SystemIO 0 (8 width) Address= 0 2F
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2F
exregion-0378 [64] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [63] ExSystemIoSpaceHandler: SystemIO 0 (8 width) Address= 0 2F
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2F
exregion-0378 [64] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [63] ExSystemIoSpaceHandler: SystemIO 0 (8 width) Address= 0 2F
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2F
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
exregion-0378 [65] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2F
exregion-0378 [62] ExSystemIoSpaceHandler: SystemIO 1 (8 width) Address= 0 2E
evmisc-0210 [53] EvQueueNotifyRequest : Dispatching Notify(2) on node 0xffffff0000940630
evmisc-0215 [53] EvQueueNotifyRequest : Notify value: Device Wake
evmisc-0286 [53] EvQueueNotifyRequest : No notify handler for Notify(PWRB, 2) node 0xffffff0000940630
[repeats hundreds of times]
The acpi man page mentions the possibility of selectively disabling acpi
features. I tried adding debug.acpi.avoid="\_GPE._L0E" to
/boot/loader.conf and rebooting, but that does not help. Am I doing it
right?
The machine is a single Opteron with a Tyan S2875 Tiger K8W motherboard.
I am running FreeBSD 6.2-RELEASE-p4 amd64. I've included the output of
acpidump -t.
Thanks in advance for any suggestions on fixing this. Please let me know
if I have left out any important details. I would appreciate a personal
cc on any replies, but I will check the list too.
Output of acpidump -t:
/*
RSD PTR: OEM=ACPIAM, ACPI_Rev=2.0x (2)
XSDT=0x3fff0100, length=36, cksum=157
*/
/*
XSDT: Length=76, Revision=1, Checksum=199,
OEMID=A M I, OEM Table ID=OEMXSDT, OEM Revision=0x6000514,
Creator ID=MSFT, Creator Revision=0x97
Entries={ 0x3fff0281, 0x3fff0380, 0x3ffff040, 0x3fff3990, 0x3fff39d0 }
*/
/*
FACP: Length=244, Revision=1, Checksum=222,
OEMID=A M I, OEM Table ID=OEMFACP, OEM Revision=0x6000514,
Creator ID=MSFT, Creator Revision=0x97
FACS=0x3ffff000, DSDT=0x3fff03f0
INT_MODEL=APIC
Preferred_PM_Profile=Workstation (3)
SCI_INT=9
SMI_CMD=0x102f, ACPI_ENABLE=0xe1, ACPI_DISABLE=0x1e, S4BIOS_REQ=0x0
PSTATE_CNT=0xe2
PM1a_EVT_BLK=0x1000-0x1003
PM1a_CNT_BLK=0x1004-0x1005
PM_TMR_BLK=0x1008-0x100b
GPE0_BLK=0x1020-0x1023
GPE1_BLK=0x10b0-0x10b7, GPE1_BASE=16
CST_CNT=0xe3
P_LVL2_LAT=101 us, P_LVL3_LAT=1001 us
FLUSH_SIZE=1024, FLUSH_STRIDE=16
DUTY_OFFSET=1, DUTY_WIDTH=3
DAY_ALRM=125, MON_ALRM=126, CENTURY=127
IAPC_BOOT_ARCH={LEGACY_DEV,8042}
Flags={WBINVD,PROC_C1,SLP_BUTTON,RTC_S4}
X_FACS=0x3ffff000, X_DSDT=0x3fff03f0
X_PM1a_EVT_BLK=0x1000:0[32] (IO)
X_PM1a_CNT_BLK=0x1004:0[16] (IO)
X_PM_TMR_BLK=0x1008:0[32] (IO)
X_GPE0_BLK=0x1020:0[32] (IO)
X_GPE1_BLK=0x10b0:16[64] (IO)
*/
/*
FACS: Length=64, HwSig=0x00000000, Firm_Wake_Vec=0x00000000
Global_Lock=
Flags=
Version=1
*/
/*
DSDT: Length=13725, Revision=1, Checksum=252,
OEMID=0AAAA, OEM Table ID=0AAAA000, OEM Revision=0x0,
Creator ID=INTL, Creator Revision=0x2002026
*/
/*
APIC: Length=108, Revision=1, Checksum=185,
OEMID=A M I, OEM Table ID=OEMAPIC, OEM Revision=0x6000514,
Creator ID=MSFT, Creator Revision=0x97
Local APIC ADDR=0xfee00000
Flags={PC-AT}
Type=Local APIC
ACPI CPU=1
Flags={ENABLED}
APIC ID=0
Type=Local APIC
ACPI CPU=2
Flags={DISABLED}
APIC ID=129
Type=Local APIC
ACPI CPU=3
Flags={DISABLED}
APIC ID=130
Type=Local APIC
ACPI CPU=4
Flags={DISABLED}
APIC ID=131
Type=IO APIC
APIC ID=1
INT BASE=0
ADDR=0x00000000fec00000
Type=INT Override
BUS=0
IRQ=0
INTR=2
Flags={Polarity=conforming, Trigger=conforming}
Type=INT Override
BUS=0
IRQ=0
INTR=2
Flags={Polarity=conforming, Trigger=conforming}
*/
/*
OEMB: Length=65, Revision=1, Checksum=183,
OEMID=A M I, OEM Table ID=OEMBIOS, OEM Revision=0x6000514,
Creator ID=MSFT, Creator Revision=0x97
*/
/*
HPET: Length=56, Revision=1, Checksum=18,
OEMID=A M I, OEM Table ID=OEMHPET, OEM Revision=0x6000514,
Creator ID=MSFT, Creator Revision=0x97
HPET Number=0
ADDR=0x00000800
HW Rev=0xa0
Comparitors=2
Counter Size=0
Legacy IRQ routing capable={TRUE}
PCI Vendor ID=0x1022
Minimal Tick=1
*/
/*
ASF!: Length=134, Revision=1, Checksum=107,
OEMID=AMIASF, OEM Table ID=AMDSTRET, OEM Revision=0x1,
Creator ID=INTL, Creator Revision=0x2002026
*/
--
Nate Eldredge
neldredge at math.ucsd.edu
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