Latitude 6430u high CPU after sleep (high fan, battery drain)

Hi brian01,

May I know the version of BIOS in the system? Did you ever notice this issue before reinstalling windows?

Also, does the laptop tend to overheat? If it does, you may try steps in the following link to troubleshoot: http://dell.to/16dOvFl

The BIOS is the most recent release, A04.  Our process is to receive laptops and reinstall them with a clean image, so I cannot say whether it happened before the reinstall.

The laptop does not overheat, but the fan does run more often, indicating that additional heat is being generated.  The main problem is increased battery drain due to constant CPU load and additional noise caused by an always-running fan.

Hi brian01,

As you have rightly pointed out in your first post, fans will run often if CPU is running constantly at higher temperature.

Once the computer is back from sleep, open task manager and kill the processes that are hogging up the CPU. After that, please check and let me know if the fans slow down.

The process "Interrupts" is not a real process and only represents the activity of hardware or software interrupts which take place within the system.  These are caused by drivers.  Because of this, it cannot be killed.

The problem is that some hardware or drivers are not resuming correctly from the sleep state.  This can most likely be fixed in a driver update, but Dell must investigate and release such an update.

Hi brian01,

I would like to know the sequence in which you have installed the drivers after reinstalling Windows 7.

Ideally the drivers have to be installed in correct order for the system to work properly. Please refer the following link for more information: http://dell.to/Ynnsnr

I really can't say as this was done many months ago.  I generally install chipset drivers first, then video, then everything else.

Going through the Windows log, sorted by date, I can see these in this order:

  - Intel Network Connections

  - Dell System Detect

  - O2Micro flash memory card driver

  - Intel rapid storage tech

  - Dell client system update

  - Windows driver package - Dell Inc PBADRV System

  - Dell data protection access

  - Dell webcam control

  - o2micro oz776 scr driver

  - Dell feature enhancement pack

I have tried to reinstall drivers, which has had no effect on this issue.

Hi brian01,

Since the issue appears to have started after the operating system reinstallation, would suggest you to reinstall the operating system again. Please backup data before attempting this. Refer the following link for detailed instructions to reinstall Windows 7: http://dell.to/10iuVJe

After installing Windows 7, please follow the correct order as mentioned in the article from previous post to install the drivers.

Please post the results.

Hi brian01,

I have researched about the issue and have suggested the available solution.

Request you to reinstall the operating system.

Although this topic has been silent for 5 weeks or so, I must report I have exactly the same issue. And I have had this issue with the Dell Pre-Installed image, a new WIndows 7 installation and the Dell Corporate Image (I am a Dell employee).

Thanks,

Erwin

#iworkfordell

BTW: I am now running BIOS A05.

Also, after about an hour after waking from sleep, the CPU load finally dropped to normal levels and then right after the fans quited.

Hi there,

i have a Latitude 6530 with the same issue. It happend either with the stock configuration and also with the latest drivers. BIOS is A13.

Regards

Joachim Ausd

The same issue here with Latitude E6430 with Windows 7 SP1 installed and with all the updates from Dell till July 2014. So Dell still has not resolved the driver issue.

As the original poster, I wanted to provide an update.  I did not reinstall the operating system but at some point this issue seems to have gone away.  I don't put the laptop to sleep that often, but I have not seen it anymore on the occasions that I do.

Since you are asking about a different laptop model, you should probably create a new message about your issue (don't reply to an existing one), since this kind of problem is very specific to the laptop you have.

That's a common problem for similar models. Don't you think Dell write different driver for different models but with same parts?