Blocked CPU Accelerator

Since I own my E7440 Latitude, I encounter the following problem:

The i5-4310U processor is supposed to throttle from 800 to 2600 mhz based on request.
However, after sleep it seems stuck at 800 mhz when running on battery power.

This translates into 100% cpu usage and slow performance. Rebooting solves the problem - until the next morning.

I hope someone can help me find a solution to this problem.
As a temporary solution I'm manually control the speed of the cpu with a tool called ThrottleStop.

(Potential) solution or explanation is welcome.

This problem was solved by replacing the motherboard.

Tags: Dell Laptop

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