MLP Report

Errata and Contingencies
Operating System
Failing Test
Expiry
Date
ID
Number
Type
Error Description
Windows 7
Windows 7 64-bit
Class Driver AC3
Test - Win7
(System)
6/30/2025 1256 Erratum
Run AC3 test on a system with the Microsoft HD Audio class
driver installed. Expected results: All AC3 kernel streaming data
ranges should advertise MinimumBitsPerSample = 16 and
MaximumBitsPerSample = 16. Actual results: HD Audio class
driver sometimes advertises MaximumBitsPerSample = 24.
Windows 7
Windows 7 64-bit
Class Driver
Fidelity Test -
Win7 (System,
Manual)
7/31/2015 1012 Erratum
Fidelity uses too small of a buffer and wakes up too
infrequently during the System Activity test. This causes errors
like: Noise level during system activity on (left or right) channel
73.2016 dB: *** FAIL *** (requirement >= 80 dB)
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
below the port. This assertion needs to be removed from the
PCIHCT. The current architecture of the PCIHCT prevents it from
knowing whether devices exist below a bridge/port.
Windows 7
Windows 7 64-bit
PCI Hardware
Compliance Test
For Systems
12/01/2012 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 7
Windows 7 64-bit
UAA Test - Win7
(System)
6/1/2015 1300 Erratum
HD Audio pin configuration document calls out setting Port
Connectivity to No Connection as the way to turn a pin off in a
particular system. UAA Test incorrectly tests such pins.
Windows 7
Windows 7 64-bit
UAA Test - Win7
(System)
6/1/2013 1670 Erratum
HDMI audio devices are backed by video pipes; if a graphics
subsystem exposes three output ports, but only has two video
pipes, it is not possible to get all three HDMI audio endpoints
"active" simultaneously.
Windows 7
Windows 7 64-bit
UAA Test - Win7
(System)
6/1/2015 513 Erratum
UAA Test requires the Traffic Priority bit to be read/write -
however there are two specs that apply, and they conflict. One
says the bit must be read/write, the other says it must be read-
only. Contact has been made with the author of both specs
(Intel) but until this point is clarified we cannot fail submissions
containing this test failure.
Windows 7
Windows 7 64-bit
USB Host
Controller
Compliance
(Automated)
12/1/2012 1787 Erratum
Errata 1787 This Preview Test is being filtered until the
expiration date of this Errata. After the expiration date of this
filter these failures must be fixed to have a passing submission.
Microsoft strongly recommends that these errors be
investigated prior to this test or job being required for
submission. XHCI spec compliance test is in preview