MLP Report

Windows 7
Windows 7 64-bit
Windows Vista
Windows Vista 64-bit
1)Class Drive
Fidelity Test –
Win7 (System,
Manual)
2)HDAudio
Class Driver
Fidelity Test –
Vista (System,
Manual)
12/1/2009 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 7
Windows 7 64-bit
Windows Vista
Windows Vista 64-bit
1)Class Drive
AC3 Test -
Win7 (System)
2)HDAudio
Class Driver
Test – Vista or
Serve 08
(System)
6/1/2010 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
Windows Vista
Windows Vista 64-bit
1)UAA Test -
Win7 (System)
2)UAA Test –
Vista or Serve
08 (System))
12/1/2009 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
Windows Vista
Windows Vista 64-bit
1)UAA Test -
Win7 (System)
2)UAA Test –
Vista or Serve
08 (System)
12/1/2009 1198
Erratum
"High Definition Audio Device" devices need to comply with the
Intel High Definition Audio spec, as well as revisions (known as
Document Change Notifications, or DCNs.) One such DCN - in
particular, DCN 34-A2 - clarified the behavior of "pin sense"
verbs as applied to digital pins (S/PDIF, HDMI, and DisplayPort.)
Prior to the DCN, the language of the spec was unclear and
mistakenly implied that the "Impedance" bits could be used by
digital pins. The DCN clarified this to say that Impedance bits are
reserved for digital pins.
Windows 7
Windows 7 64-bit
Windows Vista
Windows Vista 64-bit
1)UAA Test -
Win7 (System)
2)UAA Test –
Vista or Serve
08 (System)
6/1/2010 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
Windows Vista
Windows Vista 64-bit
1)UAA Test -
Win7 (System)
2)UAA Test –
Vista or Serve
08 (System)
8/1/2010 1144
Erratum
Preview Filter: UAA Test - Intel Low Power DCN says "EPSS
implies KeepAlive, but only after July 1st 2011"
Windows 7
Windows 7 64-bit
Windows Vista
Windows Vista 64-bit
1)Wave Test -
Win7 (System)
2)Wave Test –
Vista or Serve
08 (System)
6/1/2010 1281
Erratum
Run "Data Intersection Test\Capture Streaming\Check
Supported Formats" out of WaveTest on a system containing
audio devices that are "disabled" via the Sound Control panel.
Expected results: should succeed. Actual results: fail with "Failed
to find any endpoints for the current pin" and "Failed to decide
if current data intersection test should be skipped"
Windows Vista
Windows Vista 64-bit
2)Wave Test –
Vista or Serve
08 (System)
6/1/2010 1297
Erratum
WaveTest can't find endpoint on Vista driver.
Windows 7
Windows 7 64-bit
WDDM CCD
Test for Forced
Projection
6/1/2010 1268
Erratum
The WDDM CCD Test for forced projection test fails due to not
recognizing SDTV dongle as a forcible target.