MLP Report

Errata and Contingencies
Operating System Failing Test
Expiry
Date
ID
Number Type Error Description
Windows 7
Windows 7 64-bit
1)Class Driver
Fidelity Test -
Win7 (System,
Manual)
2)Fidelity Test -
Win7 (System,
Manual)
12/01/2009 1417
Erratum
Fidelity Test includes a "System Activity Test" that verifies
audio fidelity is not compromised during system activity.
It uses an activity generator called rws.exe (Real World Stress)
which has a bug that causes it to hit an access violation. When
this happens it exits with return code 0xC00000005, or -
1073741819.
Windows 7
Windows 7 64-bit
1)Class Driver
Fidelity Test -
Win7 (System,
Manual)
2)Fidelity Test -
Win7 (System,
Manual)
12/31/2009 1547
Erratum
Fidelity Test now includes a "Render Power Transition" test.
This preview filter covers all errors in this new test of
SYSFUND-0050.
Windows 7
Windows 7 64-bit
Class Driver
Fidelity Test -
Win7 (System,
Manual)
12/01/2009 1670
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
Windows 7 64-bit
Class Driver
Fidelity Test -
Win7 (System,
Manual)
12/01/2009 1424
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 7
Windows 7 64-bit
PCI Hardware
Compliance
Test For
Systems
12/31/2009 385
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.