DPC latency - really high

[Luki1412]

nice latency thereDo you think this is normal for a new laptop with latest windows, drivers, bios....? Delayed audio and this insane dpc latency. People say below 100 is normal and I have about 3700... like you cant be serious.  What do I do?

[Jeet_singh]

@Luki1412,

Welcome to the HP Forums 🙂 I would like to take a moment and thank you for using this forum, it is a great place to find answers. For you to have the best experience on the HP forum, you could also visit our HP Forums Guide for First Time Here? Learn How to Post and More. I see from your post you're having issues with delayed audio and dpc latency on your HP 15 notebook. Don't worry we'll work together to help you find a solution.

To provide you with an accurate solution, I'll need a few more details:

Have you recently made any software or hardware changes on the PC before the issue started?

Have you ensured all the drivers on your PC are updated either using Windows update or using HP support Assistant?

Have you tried to run any test on the computer from F2?

Is it happening only during specific application. 

In the meantime, let's try these steps here: 

Let's start off by performing a Hard reset on the notebook: 

Before power resetting your computer, do the following:

1. Disconnect or remove all peripheral devices. Start up the laptop and test the computer by itself, and then reconnect one peripheral device at a time.

2. Turn over the computer and look for a battery compartment door.

   • If there is a battery compartment, use the steps in Reset a laptop with a removable battery.

   • If there is no battery compartment, use the steps in Reset a laptop with a sealed or non-removable battery.

 I recommend to restore the BIOS defaults.You could restore the BIOS with this document selecting the reloading the BIOS default settings. That way it will look at the Hardware installed on the Notebook.

Once done, restart the computer and check.

Let's run an extensive system diagnostics test from F2 (Please capture the failure ID for further assistance).

If the test fails then it's a clear indication for a possible hardware failure. 

If the test passes, then this could be an issue related to software or driver. Let's try the steps mentioned below:

I would suggest here is to Run Windows Updates troubleshooter -

Download and install the troubleshooter from this link.

Now try to perform Windows Updates - 

1) In the search box, type and open Windows Updates. 
2) Check for updates. 
3) If the updates are available, click on install and restart the computer. 

If the issue persists, I would suggest here is to uninstall the audio drivers from device manager: 

Right-Click on start button> click device manager> expand sound video and game controllers>then select the sound drivers and right-click on it and uninstall the audio drivers.

Then check the box delete the software for this device.

Restart the computer and then update the Bios, Chipset and audio drivers on your PC from our HP support website, using this link.

Also, download and install HP support assistant on your PC. It should automatically download and install the latest updates and drivers for your PC.

Refer this link to know how to use HP support assistant.

Once done, restart the computer.

Could you please respond to this post with the details and with the results of the troubleshooting as this will help me in further assisting you.

Eagerly waiting for your response!

that said, If the information I've provided was helpful, 

give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck.

[Luki1412]

Hello good sir, I will try to give you as many details as I can.

Before the issue started? no. The first thing i noticed after i started the laptop for the first time was that my audio through the headphones was delayed. I opened latest chrome and a random youtube video and audio started 2-3s after the video. It was in sync just muted/delayed for first 2-3s. So i posted a message here on the forums. So I thought it could be outdated drivers, since its a new laptop. I updated windows, i updated bios and i updated drivers downloaded from your website.

Didnt fix it. I checked the dpc latency and it was very high. So I thought these two problems are related.

So no, I made changes to it AFTER they started happening.

No available updates through Windows or your website. In fact I installed updated drivers from the developers(intel,realtek,nvidia) website in order to find a solution to this, so my drivers are newer yet the problem still exists. I can reinstall HP drivers if needed though. I have them on my drive still. 

I checked and both issues happen in any application. Audio is delayed regardless of whether i open a music player or a browser. DPC latency is through the roof even right after booting into windows. I have noticed though that audio is delayed only when i dont do anything with sounds for a while. You know the silent static or hissing sound audio equipment makes when its in use? Seems like drivers are supposed to turn it on and off based on use so you save energy when no sound is being played and turning it on is delayed on my machine. Once its on, the sound works fine.

When it comes to bios, there is no need to reset it. There are basically no options. I am quite disappointed by that. My 300€ work laptop from HP has more options and features than this 1600€ laptop. Theres nothing to reset. I enabled two settings and thats one for Virtual Machines and one for Fans not always on. Changed max baterry charge to 80%. Thats it. I cant even do more. I cant even set dynamic turning of keyboard backlight. This laptop doesnt have an option to turn off the keyboard backlight after a couple of second. Could you please tell this to the devs? Like honestly. My work laptop has it. Its from HP. This one does not. Im baffled. Theres also no silent mode for the fans, like if Im not doing anything the laptop should be silent. Just a couple of improvements I would like to be added. 

Anyway, I will do a hard reset and the extensive test right now and post the results when its done.

[Jeet_singh]

@Luki1412,

It's great to have you back and your patience is greatly appreciated. 

As I understand you have exhausted all possible troubleshooting and unfortunately nothing has helped to resolve this issue.

In this scenario, I'm sending out a Private message with the information you need to get this sorted,

Please check your Private message icon on the upper right corner of your HP Forums profile 

Next, to your profile Name, you should see a little blue envelope, please click on it 

Keep me posted,

that said, If the information I've provided was helpful, 

give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck.