Windows 7 - Please help - speaker pop

The pop sound comes out of the subwoofer (on the bottom of the notebook). I sent the pc in for repair. I got it back without the repair. The pop sound is exactly the same when I exit bios as it is when I boot up or shut down windows. This is not, I will repeat, this is not an optional sound that can be tweeked or modified. It is an electronic problem. In fact I was able to contact an unofficial official from the HP repair contractor in freemont CA where the PC's are sent for this type of problem. I finally got the guy to admit that there was a bad chip that they replace. In my case they replaced the MB with one having a similar date code, that had the same problem. I returned the PC for a refund, and ordered another one (shipped from shanghi). I just got it yesterday, and it makes the same pop sound. No computer (of about 25) that I have ever had (with any OS) has made this pop sound. It's a chip thing, not a driver or OS. At least for this particular problem.

I've read that Windows 7 has implemented a new AudioDevice PowerSetting called D3Cold which basically comes as close to turning off the audio as possible. So my guess is that your audio has timed out, and when it has something to play, it comes out of this sleep mode, and makes the pop sound. I have it too and it p*sses me off. Didin't happen with Vista. Tried to edit my IdlePowerState setting in the registry (changing it from 04 to 03), didn't fix it. Now am trying to change the timeout value (PerformanceIdleTime) from 2c01 (300 secs) to 2c0f) 67 minutes. Seems to have fixed it.

Jabba, where did you find those keys in the registry? I've located several instances, none of which have the values you mentioned. I've been trying to fix this problem since I got my dv7t laptop about a week ago; the pop only occurs when something Windows-based is on the screen (usually the startup or shutdown screens) and reoccurs every time I install new audio drivers, so I'm leaning towards a software issue.

Sorry I should have posted more detail.
The site that I got my information from was: Audio Device Class Inactivity Timer Implementation (Windows Driver Kit)

My "IdlePowerState" was set to 04, which is D3Cold in their terms; I changed it to 03 (which I assume is D3Warm, and which I also assume is the pre-Windows 7 setting); it made no difference. Since this is a desktop and not a laptop, I ignored the ConservationIdleTime setting (since that applies to running on battery power), and I increased toe PerformanceIdleTime from 012c (or in the registry, "2c 01 00 00") which is 300 seconds, to "2c 0f 00 00" which is about 67 minutes. and so far that seems to have fixed it. I assume if I'm idle for over 67 minutes and then I get an email, it'll "pop" again, so my choices are to change the IdlePowerState to 00, or increase the PerformanceIdleTime to an even bigger value. You may find many copies of these values in the registry, remember to only change the one under hkey_local_machine system CurrentControlSet.

Good luck. By the way, funny coincidence, I just bought my wife a dv7t, it doesn't have this problem.

For those reading this anew, the sound is as if someone were plugging the speakers into the jack.

Excellent work!

Ap

I tried Jabba's post (changing those registry values). This did not help me.
I have the same problem as the initial post:
new HP dv7t-3300 (right out of the box) in which the speakers pop before shutdown (and sleep) and after startup. To clarify the "pop" or "popping sound" is as if someone were plugging the speakers into the jack (as Jabba said). It is coming from somewhere around the subwoofer or head phones jack.

I have attempted updating drivers with no fortune in fixing this.
Pop occurs both with power supply and without.
The pop still happens when the sound is muted.
Adjusting "Loudness Equalization" does not help.
I tried a clean boot, still pops.

If I disable the IDT High Definition Audio Codec in the Device Manager, then the popping does go away (along with all sound).

Hmmm, all the values I have for those registry keys are set to "00", and I'm not sure I want to go fiddling. I found an article on HP's website that essentially said "It happens on some systems, it doesn't hurt the speakers or the computer, so either live with it or send it back in for repair." Since I have neither the time nor the inclination to wait two weeks for what will likely be an reoccurring problem, I guess I'm stuck with the errant pops for the time being (they're not really an issue, just a brief annoyance a few times a day). Hopefully one of these days I'll be going through a driver update and be pleasantly surprised when the issue vanishes.

My values were all set to 00 as well. Apparently, some people running Ubuntu have had similar issues and found a fix. See
[SOLVED] dv7t Subwoofer Issue - Page 4 - Ubuntu Forums
[xubuntu] ATTENTION HP dvX laptop owners with speaker sound issues ... - Ubuntu Forums
[ubuntu] Speakers weird noise on shutdown [Archive] - Ubuntu Forums

I just wish that those running Windows 7 could too. It's quite annoying.

"I guess I'm stuck with the errant pops for the time being (they're not really an issue, just a brief annoyance a few times a day). Hopefully one of these days I'll be going through a driver update and be pleasantly surprised when the issue vanishes."

Lol, my thoughts exactly!!!

Check this driver update - IDT High Definition Audio CODEC Driver HP Pavilion dv7-3170ca Entertainment Notebook PC - HP Customer Care (Canada - English)=

It solved my problem with the pop on shutdown, but not the pop on startup

Let me know your experience.