My box has a 3.2-GHz, dual-core Pentium D 940 processor, Intel D945PVS motherboard, and Windows Vista Ultimate as its OS. I forget exactly when I put the machine together, but I'm been running Vista on it since Microsoft released it in January. The audio was working fine, until the . . . .

Last month, there came a day when the music died. According to the audio properties box, the high-def audio was no longer connected. Windows Device Manager saw the high-def codec. It just wasn’t working.

Several attempts to reinstall the driver, and to uninstall and re-attach (i.e., "scan for new hardware") the codec and the audio devices came to naught.

Finally, in desperation, I fished an old Creative Labs audio card out of the junk bin and installed it. This revived the audio, but of course I couldn't let it alone, both because I wanted to find out the cause of the problem, and because who wants a $20 audio card on a fancy new dual-core Vista machine?

Here's where it gets interesting. In searching for the root of the problem, I came across numerous other cases where people had exactly the same difficulties I'd encountered. That's correct: high-definition audio crapping out is a widespread issue for Vista users.
Interestingly, it turns out that this is not necessarily Microsoft's fault. More on that later.

The problems seem to exist regardless of whether your system has the SigmaTel high-definition codec, like mine does, or the Realtek codec. (There also are discussions here and here.)

All the forum traffic advises the same thing: find the most current driver. It'd be nice if fixing the problem was that simple. It isn't.

My first attempt at restarting my audio was to grab the most current SigmaTel driver and install it. (Note that SigmaTel's drivers aren't available from IDT -- the company which makes the codec -- but instead have to be obtained from the maker of your motherboard. In my case, this was Intel.) I downloaded the 5.10.5511.0 driver from Intel. I then banged my head against the virtual wall through several unsuccessful rounds of uninstall-restart-install-restart.

One thing that really annoys me about all this stuff is, it may be trivial to do driver installs in terms of the brain power which is required, but it sure sucks up a lot of valuable time. I really resent being forced to do stuff that should have been taken care of on the vendor end.

At this point, it hadn't yet hit me that the most current driver, certified and supplied by my motherboard vendor -- and Intel to boot -- might not be the solution. Thus, I figured the problem had to lie elsewhere.

Accordingly, I went into Vista to look for its list of installed Windows Updates. These are patches which Microsoft pushes down to your machine (automatically, if you're not careful). In the case of Vista, there have been many patches over the past nine months. Most of them involve security, but some touch Windows Media Center, digital-rights-management, and software licensing.

My thought was that one of the updates might have messed with the SigmaTel driver, and was therefore at fault. However, rolling back all non-security patches after the date at which the audio went out didn't correct the problem.

In retrospect, I don't know why I thought it would. If you've got a bad driver, you've got a bad driver. A system restore would have made more sense. But, like an airplane pilot caught in a storm, one's clear thinking often goes out the window in the midst of debugging a Windows problem.

Eventually, it dawned on me that Vista itself wasn't at fault. I believe it's likely that Vista at some point updated the SigmaTel driver, and put a non-working (though certified) driver in place of the one that was originally on my system. However, Vista itself was not balking on the audio front. The codec simply "wanted" another driver.

As I mentioned, SigmaTel, which is now owned by IDT, doesn't source its drivers. Intel, which made my D945PVS motherboard, only offered that useless 5.10.5511.0 driver.

I turned up another source of SigmaTel drivers at Softpedia. As reluctant as I was to download them from this non-vendor source, I figured it was a better bet than that .ru Web site -- that's a Russian domain -- which also had SigmaTel drivers.

I tried two SigmaTel drivers. The 6.10.5290 driver worked, and my high-definition audio was back in business.

Aftermath

While it's the job of a blogger to universalize from his or her own experience, it wouldn't be fair to suggest that my travails alone meant there was a problem with Vista drivers. However, when you add that to all the threads I saw on The Vista Forums and on the TechNet Vista Forums (these are two separate and distinct online discussion venues), then you've got ample evidence.

So, yes, Virginia, there's a problem with Vista drivers. I'm not just talking audio drivers, but graphics drivers, USB drivers, and wireless card drivers, too (among others).

As I mentioned earlier, the blame for absent of not-quite-ready-for-prime-time drivers can't be laid entirely at Microsoft's door. That's because most of the drivers don't come from Microsoft, but from third parties (i.e., the vendors who make the audio codecs and graphics cards.)

However, the lengthy delays in getting Vista to market clearly have something to do with the fact that Vista drivers are still being buzzed out. Eventually, and probably very soon, all these issues will disappear as the recalcitrant drivers are replaced by working ones.

For now, though, this is a situation which didn't have to -- and shouldn't have -- come to pass.

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