near 100% cpu usage by keventd on a toshiba 1410-604

near 100% cpu usage by keventd on a toshiba 1410-604

[Ricardo Ferreira]

Hello

When I install your patch ACPI works "great" on my toshiba laptop. the 
included toshiba module is able to set the lcd brightness, and everything 
else seems to work fine.

the only problem is near 100% cpu usage by keventd :( (seen in 'ps aux' after 
boot)

I unloaded everything I could (init=/bin/bash pci=noacpi at the command line) 
and the problem remains so I'm sure it's acpi's problem. (btw, If I use the 
standard ACPI from 2.4.20, ACPI works fine (if I uncomment a couple of lines 
which stated my BIOS as being on the blacklist) - except with this version of 
ACPI I don't have access to the toshiba module :( 

I tried snooping around, but writing a 0xff to /proc/*_debug (don't remember 
the exact filename) produced too much output and I was unable to get back to 
the console (geeezzz) C-M-Sys_Req-b was the only way to restart it :P

I found a particular dmesg line interesting (I'll just post everything related 
to ACPI):

ACPI: Subsystem revision 20030109
PCI: PCI BIOS revision 2.10 entry at 0xfd4df, last bus=5
PCI: Using configuration type 1
 tbxface-0098 [03] acpi_load_tables      : ACPI Tables successfully acquired
....................................................................................................
Table [DSDT] - 666 Objects with 65 Devices 183 Methods 7 Regions
ACPI Namespace successfully loaded at root c033f4fc
evxfevnt-0073 [04] acpi_enable           : Transition to ACPI mode successful
   evgpe-0262: *** Info: GPE Block0 defined as GPE0 to GPE15
schedule_task(): keventd has not started 
Executing all Device _STA and_INI 
methods:...............................................................
63 Devices found containing: 63 _STA, 1 _INI methods
Completing Region/Field/Buffer/Package 
initialization:.............................................
Initialized 4/7 Regions 0/0 Fields 18/18 Buffers 23/23 Packages (666 nodes)
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: System [ACPI] (supports S0 S3 S4 S5)
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 7 *11)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 7 *11)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 7 *11)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 7 *11)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 7 *11)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 7 *11)
ACPI: PCI Interrupt Link [LNKG] (IRQs *10)
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 7 *11)
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
PCI: Ignoring BAR0-3 of IDE controller 00:1f.1
Transparent bridge - Intel Corp. 82801BAM/CAM PCI Bridge
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCIB._PRT]
pci_bind-0194 [05] acpi_pci_bind         : Device 00:02:0a.00 not present in 
PCI namespace
pci_bind-0194 [05] acpi_pci_bind         : Device 00:02:0a.01 not present in 
PCI namespace
pci_bind-0194 [05] acpi_pci_bind         : Device 00:02:0d.00 not present in 
PCI namespace
pci_bind-0194 [05] acpi_pci_bind         : Device 00:02:07.00 not present in 
PCI namespace
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
ACPI: Power Resource [PFAN] (off)
---------------------------------------------------------------------------------------------------------------

Notice the line
schedule_task(): keventd has not started

could this be the root of all evil? 

Something I didn't find in ps aux and I thought odd was that there was no 
kacpid (or something similar) running. shouldn't there be something?

Tell me how I can post more usefull information.

Thanks in advance
Ricardo Ferreira 



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