Re: CPU0: local APIC error 0x40

2014-06-09 Thread John Baldwin 
On Saturday, June 07, 2014 4:47:39 am Edward Tomasz Napierała wrote:
 On 0604T1036, John Baldwin wrote:
  On Monday, June 02, 2014 5:32:13 pm Edward Tomasz Napierała wrote:
   Some machines, including ThinkPad T61, emit the following error message
   early during boot:
   
   CPU0: local APIC error 0x40
   
   The message itself doesn't seem to be much of a problem.  However,
   every once in a while booting hangs just before that line.  I've tracked
   that down to call to AcpiHwWritePort() at
   sys/contrib/dev/acpica/components/hardware/hwacpi.c:117:
   
   switch (Mode)
   {
   case ACPI_SYS_MODE_ACPI:
   
   /* BIOS should have disabled ALL fixed and GP events */
   
   Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
   (UINT32) AcpiGbl_FADT.AcpiEnable, 8);
   
   Any idea what might be going on?
  
  This is probably triggering an SMI# to enter SMM mode where your BIOS does 
  God-knows-what but apparently triggers one of the local APIC local 
  interrupts 
  while it is configured with an invalid vector (e.g. 0).
 
 Is there anything that can be done to fix it?  (Note that fixing the
 suspend/resume seems to have also fixed the occasional hang on boot,
 but perhaps it's because I don't need to boot this thing so often now.)

Likely not.  This is actually the magic command to tell the BIOS that the OS
is ACPI-aware and to ask the BIOS to enable ACPI support.  It can do all sorts
of things and is completely outside of OS control while it runs.  The local
APIC thing is logged when the OS gains control again, but it's harmless.

-- 
John Baldwin
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Re: CPU0: local APIC error 0x40

2014-06-07 Thread Edward Tomasz Napierała 
On 0604T1036, John Baldwin wrote:
 On Monday, June 02, 2014 5:32:13 pm Edward Tomasz Napierała wrote:
  Some machines, including ThinkPad T61, emit the following error message
  early during boot:
  
  CPU0: local APIC error 0x40
  
  The message itself doesn't seem to be much of a problem.  However,
  every once in a while booting hangs just before that line.  I've tracked
  that down to call to AcpiHwWritePort() at
  sys/contrib/dev/acpica/components/hardware/hwacpi.c:117:
  
  switch (Mode)
  {
  case ACPI_SYS_MODE_ACPI:
  
  /* BIOS should have disabled ALL fixed and GP events */
  
  Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
  (UINT32) AcpiGbl_FADT.AcpiEnable, 8);
  
  Any idea what might be going on?
 
 This is probably triggering an SMI# to enter SMM mode where your BIOS does 
 God-knows-what but apparently triggers one of the local APIC local interrupts 
 while it is configured with an invalid vector (e.g. 0).

Is there anything that can be done to fix it?  (Note that fixing the
suspend/resume seems to have also fixed the occasional hang on boot,
but perhaps it's because I don't need to boot this thing so often now.)

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Re: CPU0: local APIC error 0x40

2014-06-04 Thread John Baldwin 
On Monday, June 02, 2014 5:32:13 pm Edward Tomasz Napierała wrote:
 Some machines, including ThinkPad T61, emit the following error message
 early during boot:
 
 CPU0: local APIC error 0x40
 
 The message itself doesn't seem to be much of a problem.  However,
 every once in a while booting hangs just before that line.  I've tracked
 that down to call to AcpiHwWritePort() at
 sys/contrib/dev/acpica/components/hardware/hwacpi.c:117:
 
 switch (Mode)
 {
 case ACPI_SYS_MODE_ACPI:
 
 /* BIOS should have disabled ALL fixed and GP events */
 
 Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
 (UINT32) AcpiGbl_FADT.AcpiEnable, 8);
 
 Any idea what might be going on?

This is probably triggering an SMI# to enter SMM mode where your BIOS does 
God-knows-what but apparently triggers one of the local APIC local interrupts 
while it is configured with an invalid vector (e.g. 0).

-- 
John Baldwin
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CPU0: local APIC error 0x40

2014-06-02 Thread Edward Tomasz Napierała 
Some machines, including ThinkPad T61, emit the following error message
early during boot:

CPU0: local APIC error 0x40

The message itself doesn't seem to be much of a problem.  However,
every once in a while booting hangs just before that line.  I've tracked
that down to call to AcpiHwWritePort() at
sys/contrib/dev/acpica/components/hardware/hwacpi.c:117:

switch (Mode)
{
case ACPI_SYS_MODE_ACPI:

/* BIOS should have disabled ALL fixed and GP events */

Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
(UINT32) AcpiGbl_FADT.AcpiEnable, 8);

Any idea what might be going on?

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