Dell Latitude E7440 CPU speed capped after sleep

My laptop Dell Latitude E7440 provided with Windows 8.1 at the time wherever I bought it. I did not notice this problem until I upgraded to Windows 10.

Sometimes, when I put the laptop to sleep and resume at a later date, the speed of the CPU is limited to all about 0.78 GHz and switching to High Performance mode won't help. The computer becomes very slow and the only way to solve this reboot.

I have the latest version of the BIOS installed (A15) and the other drivers are also updated.

I've seen other threads saying that the problem is to use Dell Power companion but I do not use it. I have 2 power adapters that I use with this laptop, one of them is a Dell 90W Adapter. I'm not sure about the other that I don't have it right now, but an original came with the laptop.

Any temporary/permanent fix for this? Thank you.

I solved this problem. Downgrade BIOS A01 and updated step by step each single release - A01 > A02 > A03... > A15. Now, I'm on A15 BIOS and there is no problem with CPU after suspension. I7-4600u, W8.1 x 64.

Tags: Dell Laptop

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