MLP Report

Errata and Contingencies
Operating System
Failing Test
Expiry
Date
ID
Number
Type
Error Description
Window 7
Class Driver
AC3 Test –
Win7 (System)
06/01/2010
1572
Erratum
The HD Audio class driver hdaudio.sys exposes AC-3 data
ranges on S/PDIF Kernel Streaming pins incorrectly.
The compressed AC-3 transport is "stereo", "16-bit", and at the
same sample rate as the uncompressed format. As such, AC-3
data ranges are expected to have MaximumChannels = 2, and
MinimumBitDepth = MaximumBitDepth = 16.
However, the HD Audio class driver sometimes incorrectly
exposes a MaximumBitDepth of 24 or even 32.
Window 7 64-bit
Class Driver
AC3 Test –
Win7 (System)
06/01/2010
1890
Erratum
The HD Audio class driver hdaudio.sys exposes AC-3 data
ranges on S/PDIF Kernel Streaming pins incorrectly.
The compressed AC-3 transport is "stereo", "16-bit", and at the
same sample rate as the uncompressed format. As such, AC-3
data ranges are expected to have MaximumChannels = 2, and
MinimumBitDepth = MaximumBitDepth = 16.
However, the HD Audio class driver sometimes incorrectly
exposes a MaximumBitDepth of 24 or even 32.
Windows 7
Class Driver
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.