Latency problem causing the distortion of the sound

I have explored a number of positions and found out that my relatively frequent distortion of the sound corresponds to a problem of latency that may occur every 15 seconds, give or take a second, higher than 29000us, but usually about 20000us.

I disabled the common things in one by one, Device Manager without changing the latency.

I did not have a TV tuner in the Manager devices, but uninstalled the driver of software without modification.

dv7 4002tx No. WT507PA #ABG on Win7 64 bit

Software added since the new one is Microsoft Office 2010 Small business Access 2010 and Windows 7 Professional

HP Advisor said that it is up to date

Finally, I got this problem resolved by HP. Their initial option was to ask me to re - install the image on the hard disk, which got rid of a lot of marketing software originally installed when sold, but it had no effect on the noise/latency problem

Initially, I found the driver for ACPI-composite battery in Device Manager seems to cause the every 15 sec 20000us latency spike, because when I turned it off it, the problem disappeared. However, this driver was not what has been corrected to fix the problem.

Care of HP phone rang finally comes with their solution, and it was as follows (and did not involve the composite battery ACPI driver). Despite the use of the HP support assistant, none of these changes has been marked.

1. I was told to go to the HP website and download an update of the BIOS recently transferred to my laptop - everything seemed to say that it has fixed a graphics issue. This update of the bios makes it immediately fixed the problem, if there were still a few peaks of latency up to 8000us without audio effect and without that there is no regularity of appearance.

2. I was also told to download the audio driver who had recently been transferred (since I first noticed my problem). This resulted in latency spikes never exceeding 2000us (and generally not exceeding do not 600us)

I find it interesting that support assistant did not recommend these updates, and the audio driver is always marked as updated during the specific test, despite a seemingly better being available.

Tags: Notebooks

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