MLP Report

Operating System
Failing Test
Expiry
Date
ID
Number
Type
Error Description
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
1) Fidelity Test -
Vista (System,
Manual)
2) HDAudio Class
Driver Fidelity
Test - Vista
(System, Manual)
3)Class Driver
Fidelity Test -
Win7 (System,
Manual)
4)Fidelity Test -
Win7 (System,
Manual)
6/1/2011
1801
Erratum
Fidelity Render Power Transition test does not work properly.
The test is not going to be enforced until a fix can be released.
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
1) HDAudio Class
Driver Test -
Vista or Server08
(System)
2) Class Driver
AC3 Test - Win7
(System)
6/30/2025
1256
Erratum
The HD Audio class driver hdaudio.sys exposes AC-3 data
ranges on S/PDIF Kernel Streaming pins incorrectly.
The compressed AC-3 transport is "stereo", "16-bit", and at the
same sample rate as the uncompressed format. As such, AC-3
data ranges are expected to have MaximumChannels = 2, and
MinimumBitDepth = MaximumBitDepth = 16.
However, the HD Audio class driver sometimes incorrectly
exposes a MaximumBitDepth of 24 or even 32.
Windows Vista
Windows Vista 64bit
HDAudio Class
Driver Test -
Vista or Server08
(System)
6/1/2011
142
Erratum
The Vista version of the Microsoft HD Audio class driver only
plays 48 kHz sample rate audio over HDMI audio devices; it does
not play the required 44.1 kHz sample rate.
The Windows 7/Server 2008 R2 version of the Microsoft HD
Audio class driver, on the other hand, will play both 44.1 and 48
kHz sample rate audio over HDMI devices. This errata filter thus
only applies to Vista and the initial release of Windows Server
2008 (not to Windows 7 or Windows Server 2008 R2.)
Windows Vista
Windows Vista 64bit
1) HDAudio Class
Driver Test -
Vista or Server08
(System)
12/31/2010
1444
Erratum
Errata 1444 PREVIEW FILTER - HDMI is required to support 44.1
kHz on Windows 7 The Windows Vista HD Audio class driver
does not support 44.1 kHz sample rates. There is an errata to
cover this violation of AUDIO-0023. It was mistakenly applied to
third-party drivers. As of Windows 7, the Windows Vista HD
Audio class driver supports 44.1 kHz sample rates on hardware
that advertises support for it. AUDIO-0023 is applicable. This is
a preview Errata to allow vendors to ship with systems that
violated AUDIO-0023 but were incorrectly filtered by the Vista
filter. Hardware that does not support 44.1 needs to be
updated to support 44.1, and advertise that support in a way
that the Microsoft HD Audio class driver can pick up on. Third-
party drivers need to relay this support to the OS correctly.
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
PCI Hardware
Compliance Test
For Systems
6/1/2011
401
Erratum
The following PCI Compliance test failure is acceptable: Bit 15
(Bridge Configuration Retry Enable) in the Device Control
register (offset 8h) in the PCI Express Capability table must be
read-only and always return 0 as it is reserved for devices other
than PCI Express to PCI/PCI-X Bridges. Assertion 13A41D3E-
2576-41DC-A67C-525DA3637CEA This failure is acceptable
because this is a PCIe 1.1 feature and the WLP requires
compliance with only PCIe 1.0a.
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
PCI Hardware
Compliance Test
For Systems
6/1/2011
923
Erratum
Assertion FAE18121-9177-4FB2-A081-0D04C285EFF2
Bit range 15:0 (Extended Capability ID)in the Enhanced
Capability Header register (offset 0h) in the Unrecognized
Enhanced Capability ID 13 table is Dh. It must be in the range
[0x0 - 0xB] as all other Capability IDs are reserved.
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
PCI Hardware
Compliance Test
For Systems
12/01/2012
1241
Erratum
This happens because the PCI Compliance test assumes that if
the Data Link Layer Link Active Reporting Capable bit in the Link
Capabilities register for a given PCIe port is set then that
indicates that the Data Link Layer Link Active bit will also be set.
This is an incorrect assumption because the Data Link Link
Layer Link Active bit can be reset when there is no device