Fatal trap 12 with ACPI enabled

[Ceri Davies]

I have a Compaq Presario 2178EA and am upgrading from 5.2.1-RELEASE to
-CURRENT.  ACPI in 5.2.1-RELEASE seems to work OK, but with the new
kernel I get a fatal trap on boot when ACPI is enabled just after the
hard disk is probed; details below.

Since there's a lot of information to give here, I've put a copy of the
ASL and a verbose boot log with ACPI both enabled and disabled up at
http://shrike.submonkey.net/~setantae/acpi/ - I'll happily try various
values of debug.acpi.disable if someone can give me a pointer which ones
to start with.

For the archives, the trap is:

  GEOM: Configure ad0s1, start 32256 length 15035779584 end 15035811839
  GEOM: Configure ad0s2, start 15035811840 length 14966396928 end 30002208767
  ata1-master: pio=0x0c wdma=0x22 udma=0xffffffff cable=80pin
  ATAPI_RESET time = 17040us
  
  
  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>

Ceri
-- 
It is not tinfoil, it is my new skin.  I am a robot.
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