system freeze with acpi

Hi,

My whole system freeze from time to time when using acpi. I don't get this problem without acpi. My motherboard is an asus P4S8X

 # cat /proc/version
Linux version 2.6.20-rt8 (root@localhost) (gcc version 4.1.1 (Gentoo 4.1.1-r3))
#1 SMP PREEMPT Fri Mar 30 23:15:59 CEST 2007

lspci -vvv:
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 645xx (rev 02)
Subsystem: ASUSTeK Computer Inc. Unknown device 8086
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR- Latency: 32
Region 0: Memory at e8000000 (32-bit, non-prefetchable) [size=64M]
Capabilities: [c0] AGP version 2.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans-
64bit- FW+ AGP3- Rate=x1,x2,x4 Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- Rate=<none>

00:01.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP) (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency:
64 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000f000-00000fff
Memory behind bridge: e7000000-e7ffffff
Prefetchable memory behind bridge: ef700000-febfffff Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-

00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS963 [MuTIOL Media IO] (rev 04) Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0

00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2 SMBus Controller
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin B routed to IRQ 0 Region 4: I/O ports at e600 [size=32]

00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (prog-if 80 [Master]) Subsystem: ASUSTeK Computer Inc. Unknown device 8087
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 128
Interrupt: pin ? routed to IRQ 16
Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable)
[disabled] [size=8] Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable) [disabled] [size=1] Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [disabled] [size=8] Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable) [disabled] [size=1] Region 4: I/O ports at b400 [size=16]

00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] AC'97 Sound Controller (rev a0) Subsystem: ASUSTeK Computer Inc. Unknown device 8096
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (13000ns min, 2750ns max) Interrupt: pin C routed to IRQ 5
Region 0: I/O ports at a400 [size=256]
Region 1: I/O ports at a000 [size=128]
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=55mA
PME(D0-,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if 10 [OHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 8087 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (20000ns max), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 20

        Region 0: Memory at e6800000 (32-bit, non-prefetchable) [size=4K]

00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if 10 [OHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 8087 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (20000ns max), Cache Line Size: 32 bytes Interrupt: pin B routed to IRQ 17

        Region 0: Memory at e6000000 (32-bit, non-prefetchable) [size=4K]

00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if 10 [OHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 8087 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (20000ns max), Cache Line Size: 32 bytes Interrupt: pin C routed to IRQ 18

        Region 0: Memory at e5800000 (32-bit, non-prefetchable) [size=4K]

00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 8087
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (20000ns max)
Interrupt: pin D routed to IRQ 21
Region 0: Memory at e5000000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 91) Subsystem: ASUSTeK Computer Inc. Unknown device 80a7
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (13000ns min, 2750ns max) Interrupt: pin A routed to IRQ 19

        Region 0: I/O ports at 9800 [size=256]
        Region 1: Memory at e4800000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at ef6e0000 [disabled] [size=128K]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA

PME(D0+,D1+,D2+,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.0 Multimedia audio controller: Creative Labs SB Audigy (rev 04)
Subsystem: Creative Labs SB0240 Audigy 2 Platinum 6.1
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (500ns min, 5000ns max) Interrupt: pin A routed to IRQ 23
Region 0: I/O ports at 9400 [size=64]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.1 Input device controller: Creative Labs SB Audigy Game Port (rev 04)
Subsystem: Creative Labs SB Audigy MIDI/Game Port
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32
Region 0: I/O ports at 9000 [size=8]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port (rev 04) (prog-if 10 [OHCI]) Subsystem: Creative Labs SB Audigy FireWire Port
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (500ns min, 1000ns max), Cache Line Size: 32 bytes Interrupt: pin B routed to IRQ 19
Region 0: Memory at e4000000 (32-bit, non-prefetchable) [size=2K] Region 1: Memory at e3800000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0+,D1+,D2+,D3hot+,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME+

00:0d.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) Subsystem: Scion Corporation Unknown device 0012
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (4000ns min, 10000ns max) Interrupt: pin A routed to IRQ 22
Region 0: Memory at ee800000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0d.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev
11) Subsystem: Scion Corporation Unknown device 0012
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 32 (1000ns min, 63750ns max) Interrupt: pin A routed to IRQ 10
Region 0: Memory at ee000000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:00.0 VGA compatible controller: nVidia Corporation NV25 [GeForce4 Ti 4200] (rev a3) (prog-if 00 [VGA]) Subsystem: Micro-Star International Co., Ltd. Unknown device 8700 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 (1250ns min, 250ns max) Interrupt: pin A routed to IRQ 16

        Region 0: Memory at e7000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at f0000000 (32-bit, prefetchable) [size=128M]
        Region 2: Memory at ef800000 (32-bit, prefetchable) [size=512K]
        Expansion ROM at ef7e0000 [disabled] [size=128K]
        Capabilities: [60] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA

PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [44] AGP version 2.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans-
64bit- FW+ AGP3- Rate=x1,x2,x4 Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- Rate=<none>

# cat /proc/interrupts
           CPU0       
  0:        283   IO-APIC-edge      timer
  1:        691   IO-APIC-edge      i8042
  6:          5   IO-APIC-edge      floppy
  7:          0   IO-APIC-edge      parport0
  8:          2   IO-APIC-edge      rtc
 12:          4   IO-APIC-edge      i8042
 14:      20344   IO-APIC-edge      ide0
 15:      24156   IO-APIC-edge      ide1
 17:        108   IO-APIC-fasteoi   ohci_hcd:usb2
 18:          1   IO-APIC-fasteoi   ohci_hcd:usb3
 19:       1043   IO-APIC-fasteoi   ohci1394, eth0
 20:      23230   IO-APIC-fasteoi   acpi, ohci_hcd:usb1
 21:        781   IO-APIC-fasteoi   ehci_hcd:usb4
 22:          4   IO-APIC-fasteoi   bttv0
 23:    1943588   IO-APIC-fasteoi   EMU10K1
NMI:          0 
LOC:     548999 
ERR:          0
MIS:          0

Is it normal at acpi use the same IRQ as ohci_hcd:usb1? I don't think so, but I can be wrong.

# cat .config|grep ACPI
# Power management options (ACPI, APM)
# ACPI (Advanced Configuration and Power Interface) Support
CONFIG_ACPI=y
# CONFIG_ACPI_AC is not set
# CONFIG_ACPI_BATTERY is not set
# CONFIG_ACPI_BUTTON is not set
# CONFIG_ACPI_VIDEO is not set
# CONFIG_ACPI_HOTKEY is not set
# CONFIG_ACPI_FAN is not set
# CONFIG_ACPI_DOCK is not set
# CONFIG_ACPI_PROCESSOR is not set
# CONFIG_ACPI_ASUS is not set
# CONFIG_ACPI_IBM is not set
# CONFIG_ACPI_TOSHIBA is not set
CONFIG_ACPI_BLACKLIST_YEAR=2001
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
# CONFIG_ACPI_CONTAINER is not set
# CONFIG_ACPI_SBS is not set
CONFIG_PNPACPI=y

# dmesg|grep ACPI
BIOS-e820: 000000005fffc000 - 000000005ffff000 (ACPI data)
BIOS-e820: 000000005ffff000 - 0000000060000000 (ACPI NVS)
ACPI: RSDP (v000 ASUS ) @ 0x000f5810
ACPI: RSDT (v001 ASUS P4S8X 0x42302e31 MSFT 0x31313031) @ 0x5fffc000
ACPI: FADT (v001 ASUS P4S8X 0x42302e31 MSFT 0x31313031) @ 0x5fffc0c0
ACPI: BOOT (v001 ASUS P4S8X 0x42302e31 MSFT 0x31313031) @ 0x5fffc030
ACPI: MADT (v001 ASUS P4S8X 0x42302e31 MSFT 0x31313031) @ 0x5fffc058
ACPI: DSDT (v001 ASUS P4S8X 0x00001000 MSFT 0x0100000b) @ 0x00000000
ACPI: PM-Timer IO Port: 0xe408
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl edge)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
Using ACPI (MADT) for SMP configuration information
ACPI: Core revision 20060707
ACPI: bus type pci registered
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 *5 6 7 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 10 11 12 14 15) *9
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15) *9
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 11 12 14 15) *9
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 15) *9
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 10 11 12 14 15) *9
ACPI: PCI Root Bridge [PCI0] (0000:00)
ACPI: Assume root bridge [\_SB_.PCI0] bus is 0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
pnp: PnP ACPI init
pnp: PnP ACPI: found 16 devices
PCI: Using ACPI for IRQ routing
ACPI: PCI Interrupt 0000:00:02.5[A] -> GSI 16 (level, low) -> IRQ 16
ACPI: PCI Interrupt 0000:00:03.0[A] -> GSI 20 (level, low) -> IRQ 20
ACPI: PCI Interrupt 0000:00:03.1[B] -> GSI 21 (level, low) -> IRQ 17
ACPI: PCI Interrupt 0000:00:03.2[C] -> GSI 22 (level, low) -> IRQ 18
ACPI: PCI Interrupt 0000:00:04.0[A] -> GSI 19 (level, low) -> IRQ 19
ACPI: PCI Interrupt 0000:00:03.3[D] -> GSI 23 (level, low) -> IRQ 21
ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 16
ACPI: PCI Interrupt 0000:00:0d.0[A] -> GSI 17 (level, low) -> IRQ 22
ACPI: PCI Interrupt 0000:00:0a.2[B] -> GSI 19 (level, low) -> IRQ 19
ACPI: PCI Interrupt 0000:00:0a.0[A] -> GSI 18 (level, low) -> IRQ 23

It is with the last bios revison, 1005.

With a 2.6.19.1-rt15 that have antother configuration and work fine, I get when running it with pci=noacpi:

# cat /proc/interrupts
           CPU0       
  0:     228789    XT-PIC-XT        timer
  1:        229    XT-PIC-XT        i8042
  2:          0    XT-PIC-XT        cascade
  5:     148178    XT-PIC-XT        EMU10K1
  6:          5    XT-PIC-XT        floppy
  7:          1    XT-PIC-XT        parport0
  8:          2    XT-PIC-XT        rtc
  9:       4641    XT-PIC-XT        acpi, ohci_hcd:usb1, ehci_hcd:usb2,
ohci1394, ohci_hcd:usb3, ohci_hcd:usb4, eth0 
 10:          4    XT-PIC-XT        bttv0
 11:      10019    XT-PIC-XT        nvidia
 12:          4    XT-PIC-XT        i8042
 14:      19935    XT-PIC-XT        ide0
 15:       3605    XT-PIC-XT        ide1
NMI:     729962 
LOC:     228630 
ERR:          0
MIS:          0

My problem is at I really want to use CONFIG_X86_PM_TIMER in the ACPI config.

Cheers,
Dominique

Just a random question -- does it work any better w/o PREEMPT?

...

Here is your USB controller on IRQ20.
We'd actually need to dis-assemble the _PRT in your DSDT from an acpidump to verify that this is the right interrupt for USB.
But as there are no Link targets above 16 below, I expect the PRT to be hard-coded and have no reason to suspect this is wrong. (indeed, you'd see it on IRQ20 in windows too -- though you'd have to compare the GSI numbers below to Windows IRQ numbers, because Linux still compresses its IRQ numbers above 15 on i386)

atypical, yes, but not unusual to have the ACPI SCI on an upper input. less typical still to have it shared w/ another motherboard device, but not unheard of.

CONFIG_ACPI_BUTTON will allow the OS to notice when you press the power button -- check it out.

Here is your acpi SCI interrupt being attached to GSI 20 in IOAPIC mode.

These are all legacy-mode links, so it appears that the OS is given no choice what pins to route things to in IOAPIC mode. Simple is good:-)

Why all the NMIs -- do you have nmi_watchdog running?

You will not be able to run in IOAPIC mode w/o having ACPI configure interrupts. Firstly, because there appears to be no MPS on this board -- or pci=noacpi above would have been in IOAPIC mode instead of legacy mode. Secondly, only ACPI knows about the interrupt source override for the ACPI SCI from 9->20 on this board.

So your problem is that to build this in, you need to build in CONFIG_ACPI, but when you run in full (default) ACPI mode your system hangs so it is unusable?

I have no idea what is behind the hang, there are no clues to it above that I see. However, if you think that running in PIC mode is more stable than IOAPIC mode on this box, then try running with just "noapic" which will give you ACPI mode without the IOAPIC. pci=noacpi and acpi=noirq will probably give you the same result.

-Len

you should put all this information on bugzilla
http://bugzilla.kernel.org/enter_bug.cgi?product=Platform%20Specific%2FHardware

and _attach_ all the information on this email,
what is yours CPU ?

Regards

Sérgio M.B.

I will do that straight away.

# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Pentium(R) 4 CPU 2.40GHz
stepping        : 7
cpu MHz         : 2400.154
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips        : 4802.05 
clflush size    : 64

Best,
Dominique
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It is here: http://bugzilla.kernel.org/show_bug.cgi?id=8300

Cheers,
Dominique
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