MLP Report

Errata and Contingencies
Operating System
Failing Test
Expiry
Date
ID
Number
Type
Error Description
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
1) HDAudio
Class Driver
Fidelity Test -
Vista (System,
Manual)
2)Class Driver
Fidelity Test -
Win7 (System,
Manual)
07/31/2015
598
Erratum
The European Union requires the headphone output level to
be <= 150 mVrms for headphone jacks. There's a note in
WLP requirement AUDIO-0006 that states, in the presence of
regional regulations, the output level requirement for
headphones is dropped from >= 1000 mVrms to >= 120
mVrms. This provides freedom for manufacturers to meet
both the EU <= 150 mVrms @ 32 Ohms and the WLP >= 120
mVrms @ 32 Ohms requirements. The Fidelity Test tests
headphones at 300 Ohm load, though. Without knowledge of
the output impedance at the jack, the test cannot extrapolate
what the output level at 32 Ohms would have been from the
output level at 300 Ohms. The test assumes that the output
level at 32 Ohms will be *less* than the output level at 300
Ohms, though. So any measurement >= 120 mVrms at 300
Ohms "could be" a passing result, depending on the output
impedance.
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
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 Vista
Windows Vista 64bit
1) HDAudio
Class Driver
Test - Vista or
Server08
(System)
06/01/2013
142
Erratum
Errata 142 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
filter 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
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
06/01/2013
1666
Erratum
graphics-hdmi-test-intel-two-of-three
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 Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
1)UAA Test -
Vista or
Server08
(System)
2) 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.