09-25-2013 10:42 AM
This issues has been plaguing me for months and I couldn't sort it out. When laptop is idle (after 5 to 10 mins), the CPU usage spikes to a steady 25% and stays there for ever until some interrupt is genereated (ie i start using laptop again). fans go crazy and tho whole experience is quite annoying.
I read some posts that wlan drivers could cause such scenarios. After a reboot the issue disappears sometimes for a day, however it comes back again as a taxman does. I also checked device drivers in the control panel and there is no single faulty driver. At the moment I disabled wlan and I'm using cable in a hope to isolating the problem in case it is due to the wlan driver as many said (Intel Centrino R Ultimate-N 6300 AGN).
I used process explorer by Sysinternals and tracked the issue down to a kernel/device driver function with an exotic name ExEnterCriticalRegionAndAcquireResourceExclusive. Too bad we in the linux world don't have such functions with extraordinarily amusing names.
I've attached the Process explorer snapshot. Any help is highly appreciated!
09-25-2013 06:55 PM
I've just noticed that Intel COM4 appeared as a faulty driver in the device manager. I tried to update it however Windows thinks that is up to date. I also tried to remove it but it came back.
Does anyone know how to solve this issue?
09-26-2013 12:18 AM
Is this driver installed:
Even if it is, maybe try reinstalling it...
09-26-2013 06:32 AM
09-26-2013 07:27 AM - edited 09-26-2013 07:33 AM
Now the issue appeared when the laptop went from sleep to normal operational mode. I had to reboot in order to bring the CPU usage down. The same driver function caused the loop.
I first tried installing the driver as suggested, however device manager showed faulty driver again.
How do you uninstall the feature. From device manager? Tried that but somehow windows recognizes the h/w changes and brings it back as shown on the 2nd picture.
Thanks for the suggestions.