Fatal trap 12 with ACPI enabled

[Nate Lawson]

Ceri Davies wrote:
> On Tue, Jul 27, 2004 at 10:22:45PM +0100, Ceri Davies wrote:
> 
>>On Tue, Jul 27, 2004 at 09:17:23PM +0100, Ceri Davies wrote:
>>
>>>  
>>>  Fatal trap 12: page fault while in kernel mode
>>>  cpuid = 0; apic id = 00
>>>  fault virtual address   = 0x3c
>>>  fault code              = supervisor read, page not present
>>>  instruction pointer     = 0x8:0xc04b5dea
>>>  stack pointer           = 0x10:0xc0c21c84
>>>  frame pointer           = 0x10:0xc0c21cdc
>>>  code segment            = base 0x0, limit 0xfffff, type 0x1b
>>>                          = DPL 0, pres 1, def32 1, gran 1
>>>  processor eflags        = interrupt enabled, resume, IOPL = 0
>>>  current process         = 0 (swapper)
>>>  [thread 0]
>>>  Stopped at      ata_generic_transaction+0x6a6:  testb   $0x1,0x3c(%eax)
>>>  db> tr
>>>  ata_generic_transaction(c159e708) at ata_generic_transaction+0x6a6
>>>  ata_start(c14f1200,c14f1320,0,c07e1e01,57) at ata_start+0x17b
>>>  ata_queue_request(c159e708,c,0,c,8) at ata_queue_request+0x185
>>>  ata_controlcmd(c14f12a8,8,0,0,0,0) at ata_controlcmd+0x80
>>>  ata_identify_devices(c14f1200) at ata_identify_devices+0x150
>>>  ata_boot_attach(0) at ata_boot_attach+0x27
>>>  run_interrupt_driven_config_hooks(0,c1ec00,c1e000,0,c0441325) at
>>>  run_interrupt_driven_config_hooks+0x18
>>>  mi_startup() at mi_startup+0x96
>>>  begin() at begin+0x2c
>>>  db>
>>
>>Setting hint.apm.0.disabled = 0 fixes this.
> 
> 
> Actually, it just hides it by making acpi step aside.  I'd much rather
> use ACPI - any suggestions on the next step to troubleshoot this?
> 
> Ceri

cvsup and test again.  Also, report full boot dmesg.  I fixed a 
longstanding bug in the ATA code on Sunday Aug 1 which could have caused 
this.

-Nate