So the first error message is indeed a bug somewhere.
FAILED [CRITICAL] KlogACPIErrorFieldexceedsBuffer: Test 1, CRITICAL Kernel
message: [77191.628764]
ACPI Error: Field [DRQL] at 144 exceeds Buffer [NULL] size 104 (bits)
(20110623/dsopcode-236)
The _SRS control is being passed a buffer from the kernel which is too
small (104 bits) and this is failing to write to the DRQL at bit offset
114.
Method (_SRS, 1, NotSerialized)
{
CreateByteField (Arg0, 0x02, IOLO)
CreateByteField (Arg0, 0x03, IOHI)
CreateWordField (Arg0, 0x09, IRQL)
CreateByteField (Arg0, 0x11, DRQL)
CreateByteField (Arg0, 0x14, DMAC)
Store (LPTM (0x02), Local0)
ENFG (0x0C)
STIO (0x82, IOLO, IOHI, 0x02)
If (Local0)
{
SIRQ (0x02, IRQL)
SDMA (0x02, DMAC)
}
Else
{
SIRQ (0x02, IRQL)
}
EXFG ()
DCNT (0x02, One)
}
Now the interesting part is that the buffer being passed into _SRS is
from the _CRS which can create one of two resource buffers depending on
the value of LPTM (0x02). My hypothesis is that _CRS returns to the
kernel the smaller of the two resource buffers and later on _SRS is
being passed this smaller buffer, which does only write to IRQL for this
buffer, however, the earlier part of the _SRS creates a bytefields DRQL
and DMAC assuming that the buffer being passed in is the larger buffer.
So it looks like this is a firmware bug to me. The kernel traps DRQL
(and it would trap DMAC too if it got that far) because they are offsets
outside the smaller buffer.
CreateByteField (Arg0, 0x11, DRQL)
CreateByteField (Arg0, 0x14, DMAC)
I am not sure if this breaks the execution of _SRS, but as it stands,
the kernel is being cautious and has caught a bug in the AML.
My hypothesis could be wrong. In the worst case, the PCI link control
is not being updated, which could be problematic.
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https://bugs.launchpad.net/bugs/1076979
Title:
[Dell Optiplex 760] - Fails S3 Suspend
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