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) Fidelity Test -
Vista (System,
Manual)
2) HDAudio Class
Driver Fidelity
Test - Vista
(System, Manual)
3)Class Driver
Fidelity Test -
Win7 (System,
Manual)
4)Fidelity Test -
Win7 (System,
Manual)
1/31/2011
1801
Erratum
Fidelity Render Power Transition test does not work properly.
The test is not going to be enforced until a fix can be released.
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
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 Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
PCI Hardware
Compliance Test
For Systems
6/1/2011
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 Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
PCI Hardware
Compliance Test
For Systems
6/1/2011
923
Erratum
Assertion FAE18121-9177-4FB2-A081-0D04C285EFF2
Bit range 15:0 (Extended Capability ID)in the Enhanced
Capability Header register (offset 0h) in the Unrecognized
Enhanced Capability ID 13 table is Dh. It must be in the range
[0x0 - 0xB] as all other Capability IDs are reserved.
Windows Vista
Windows Vista 64bit
Windows 7
Windows 7 64-bit
1)UAA Test -
Vista or Server08
(System)
2) UAA Test -
Win7 (System)
6/1/2011
1300
Erratum
UAA Test wrongly tests pin widgets that have their
Configuration Default register's Port Connectivity field set to No
Connection.
The Microsoft HD Audio Pin Configuration guidelines specifically
call out "set Port Connectivity to No Connection" as the official
way to turn a pin off. UAA Test should ignore any such pins, as
will the Microsoft HD Audio class driver.
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.