Thanks for the reply Darrel and Chad.

Upon further investigation I notice that EVERY TIME the PC wakes up from
Sleep mode, that error occurs. But given my earlier observation that only 1
in every five or so times I would actually lose sound, the error that is
happening, therefore, is not consistently causing no-sound on wake-up, only
random it appears.

All this could well be my own doing as my sound card is an older Sound
Blaster Live that Creative, bless their soul, deemed at the End of Service
Life and hence no Vista drivers would ever be developed.

Windows Update does install a driver called "Creative EMU10K1 Audio
Processor (WDM)", but that particular driver caused all my sounds, whatever
the source, to be absolutely garbled/distorted. So I uninstalled that driver
and instead installed my XP driver which dramatically improved sound quality;
but now I get this error and the occasional no-sound on wake-up.

A trade off I guess, although it's arguable which is better. : )

""Darrell Gorter[MSFT]"" wrote:

> Hello Rob,
> This is what the event ID is referring to:
> Basically Plug and Play manager could not locate the device after returning
> from sleep so it queries the driver The driver in this case Creative (
> audio devicemay be reporting that device does not exist, the device falis
> to start or respond to a query
>
> It's related to this: Windows Driver Kit: Kernel-Mode Driver Architecture
> Handling an IRP_MN_SURPRISE_REMOVAL Request
> http://msdn2.microsoft.com/en-us/library/aa489654.aspx
>
> basically we are finding or being able to communicate with the audio
> device. It could be driver, it could a the device itself, it could be the
> bus,
>
> Thanks,
> Darrell Gorter[MSFT]
>
> This posting is provided "AS IS" with no warranties, and confers no rights
> --------------------
> >Thread-Topic: What does this error mean (from Event Viewer)?
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> >From: =?Utf-8?B?Um9i?= <Rob@discussions.microsoft.com>
> >Subject: What does this error mean (from Event Viewer)?
> >Date: Sat, 9 Jun 2007 12:01:03 -0700
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> >
> >I use Sleep mode in Vista and on rare occasions (about 2 out of ten times
> -
> >no pattern seen so far) I would lose sound after the PC wakes up. All
> >indications, including those in Device Manager, show normal. I restart the
> PC
> >and I regain sound again. If I use hibernate mode instead of Sleep mode,
> this
> >never occurs. I like Sleep mode better as it's a lot quicker to wake up.
> >
> >In event viewer I noticed an error correlating with the time the wake up
> >occurred when sound didn't come on. I've attached two images from the
> event
> >viewer - links below.
> >
> >1. http://img355.imageshack.us/img355/8342/ev1nu4.jpg
> >
> >2. http://img355.imageshack.us/img355/3549/ev2ni3.jpg
> >
> >Can anyone decipher the meaning of this error? I'd love to be able to
> >eliminate losing sound on wake-up.
> >
>
>