MLP Report

Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
1)UAA Test -
Vista or
Server08
(System)
2) UAA Test -
Win7 (System)
2/28/2011
1299
Erratum
Preview filter - Jack Detect Override on digital pin widgets
Errata 1299
The HD Audio configuration default register (7.3.3.31 in the HD
Audio specification) includes a "Jack Detect Override" flag that
can be used to indicate that although a pin widget would
normally be capable of jack detection, there is something about
this particular system that causes this to be impossible.
This was intended to be used, for example, for analog pin
widgets that are connected to RCA jacks, which do not allow for
impedance detection.
Some digital pin widgets are using the Presence Detect pin
sense response to indicate that a digital handshake has occured
- indeed, HDMI pins have entire DCNs built around this concept,
and it applies equally well to S/PDIF pins.
A digital converter that supports presence detection should be
able to do so in any system, so the "Jack Detect Override"
concept should not apply to digital pins.
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
USB Host
Controller
Compliance
(Automated)
6/1/2012
1787
Erratum
Errata 1787
XHCI spec compliance test is in preview
For further details visit: https://winqual.microsoft.com/ec/
Windows Vista
Windows Vista 64bit
HDAudio Class
Driver Fidelity
Test - Vista
(System,
Manual)
6/1/2011
1012
Erratum
Fidelity plays a quiet (-60 dB FS) test tone during System
Activity test which is filtered out of the noise level
measurement.
However, Fidelity is quite prone to glitches during system
activity... the glitches leak into the measured noise, causing
false failures.
Windows Vista
Windows Vista 64bit
HDAudio Class
Driver Fidelity
Test - Vista
(System,
Manual)
7/31/2011
598
Erratum
EU restrictions place a cap on the output level of headphone
jacks at 32 Ohm load: headphones are not allowed to have an
electrical output of more than 150 mV at that load.
We test headphone jacks at 300 Ohm load; the relationship
between the output at 32 Ohms and the output at 320 Ohms
depends on the output impedance of the headphone jack.
In particular, if a headphone jack meets the EU requirement of X
<= 150 mV at 32 Ohms, depending on the output impedance, it
could output a huge amount of power at 300 Ohms, or very
slightly over X mV. Since we require X >= 120 mV at 32 Ohms,
absent knowledge of the output impedance we can only require
X >= 120 mV at 300 Ohms.
120 mV is -18.42 dBV. Any headphone output level at 32 Ohms
that is less than -18.42 dBV is a legitimate failure, even if it is
targeted at EU compliance. Any headphone output level greater
than 1 Vrms (0.707 Vrms for mobile systems) is a legitimate
pass, regardless of EU compliance.
This errata covers output level failures for headphone jacks
between -18.42 dBV and 1 Vrms/0 dBV (0.707 Vrms/-6.93 dBV
for mobile systems)) in accordance with note 6 of the WLP
fidelity requirements.
Windows 7
GlitchFree
WMV HD 720p
video playback
quality test
6/1/2011
2018
Erratum
The GlitchFree WMV HD 720p video playback quality test
enforces SYSFUND-0062. A problem has been found in Case 3
that may cause the test to improperly fail.
Windows Vista 64bit
System -
Common
Scenario
Stress With IO
6/1/2011
1537
Erratum
The Common Scenario Stress with IO test enumerates devices
that can be disabled early in the boot cycle. Some devices can
be disabled during the boot process, but later cannot be
disabled. Since the test does not check the device status each
time, it may attempt to disable a device that cannot be disabled.