I've spent several days tracking and trying Internet leads on audio problems. (There are many, particularly for onboard Realtek audio!) Few seem to apply, in that my audio seems to start out working okay, and the configuration looks fine.
Perhaps someone will have a new idea for me? Short of reinstalling Windows.
Audio output appears to work fine after a computer boot/restart. Plays youtube and system sounds. However, trying to open Playback Devices or Recording Devices from Speaker in toolbar appears to produce no response. Trying to open Realtek Audio Manager from Control Panel appears to produce no response. Then after about ten minutes (literally!) they do open up and appear to behave properly. Devices that use audio, such as Skype and WebEx appear to die. Even shutdown hangs with the message that Explorer can't play the logoff sound!?
Windows troubleshooters say that devices are working properly. Windows Audio and Windows Audio Endpoint Bridge services are running. However, on attempting to restart Windows Audio it eventually says it can't. Error 1053. Did not respond to stop request in a timely fashion.
Although DxDiag reports "No problems found," it fails to complete its scan.
Fairly new HPE-450f. Seemed to work fine for several months, then after some upgrade -- don't know if Windows or user program install -- began observing the behavior. Tried going back to earliest Restore point with no benefit.
Installed latest Realtek HD driver, both from HP support site, then from Reaktek site. Appears to work okay for a while, but after concluding a Webex conference, for example, then any following audio interactions are frozen. Eventually Webex won't even start an audio conference after a system restart.
sfc /scannow [reports Windows Resource Protection did not find any integrity violations]
Device Manager, Sound
ATI High Definition Audio Device [HDMI (unused) on ATI Radeon HD 5770 video cards]
Logitech Mic (Fusion) [USB webcam]
Realtek High Definition Audio [on motherboard. No PCI slots free to try an add-in audio board]
Time of this report: 2/17/2011, 09:23:45
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7600) (7600.win7_gdr.101026-1503)
System Manufacturer: Hewlett-Packard
System Model: HPE-450f
BIOS: 07/12/10 14:03:04 Ver: 6.12
Processor: Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz (8 CPUs), ~2.9GHz
Memory: 8192MB RAM
Available OS Memory: 8152MB RAM
Page File: 1622MB used, 14677MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 64bit Unicode
DxDiag Previously: Crashed in DirectShow (stage 1). Re-running DxDiag with "dontskip" command line parameter or choosing not to bypass information gathering when prompted might result in DxDiag successfully obtaining this information
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Input Tab: No problems found.
Card name: ATI Radeon HD 5770
Manufacturer: ATI Technologies Inc.
Chip type: ATI display adapter (0x68B8)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_68B8&SUBSYS_6880103C&REV_00
Display Memory: 4070 MB
Dedicated Memory: 1011 MB
Shared Memory: 3059 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: ViewSonic VX2250 SERIES
Monitor Model: VX2250 SERIES
Monitor Id: VSCCB25
Native Mode: 1920 x 1080(p) (60.000Hz)
Output Type: DVI
Driver Name: aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Driver File Version: 8.17.0010.1043 (English)
Driver Version: 8.773.0.0
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled
Description: Speakers (Realtek High Definition Audio)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0888&SUBSYS_103C2A9C&REV_1002
Manufacturer ID: 1
Product ID: 100
Driver Name: RTKVHD64.sys
Driver Version: 6.00.0001.6196 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 9/7/2010 11:27:34, 2484072 bytes
Driver Provider: Realtek Semiconductor Corp.
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: No, No
I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No
Sound Capture Devices
Description: Microphone (Logitech Mic (Fusion))
Default Sound Capture: Yes
Default Voice Capture: Yes
Driver Name: USBAUDIO.sys
Driver Version: 6.01.7600.16385 (English)
Driver Attributes: Final Retail
Date and Size: 7/13/2009 18:06:32, 109568 bytes
Cap Flags: 0x1
Format Flags: 0xFFFFF
Name: High Definition Audio Controller
Device ID: PCI\VEN_8086&DEV_3B56&SUBSYS_2A9C103C&REV_06\3&11583659&0&D8
Driver: C:\Windows\system32\DRIVERS\hdaudbus.sys, 6.01.7600.16385 (English), 7/13/2009 18:06:13, 122368 bytes