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#145392 16-May-2014 19:27
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I have noticed a dramatic decrease in performance on the Lenovo X1 Carbon when trying to open simple things such as multiple tabs ( 2 or 3) on Chrome. When I open up Task Manager, I see that the CPU Speed is always locked in at 0.60GHz and does not want to increase or "get out of it". The laptop has been feeling very sluggish lately..

Anyone know how to fix this problem please? And yes I have tried turning it off and on again! tongue-out




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'That VDSL Cat'
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  #1046518 16-May-2014 19:43
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do you happen to have the laptop on "power saving" mode?





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  #1046550 16-May-2014 19:59
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No, it's on Energy Saving mode.




 
 
 
 


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  #1046558 16-May-2014 20:11
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It is possibly just being underclocked - or maybe overheating? I know my laptops underclock themselves quite a bit when it is idle.




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  #1046559 16-May-2014 20:12
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sonyxperiageek: No, it's on Energy Saving mode.


power saving mode on my old laptop would limit it to 0.66ghz.


suspect you might be seeing the same.




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  #1046563 16-May-2014 20:16
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michaelmurfy: It is possibly just being underclocked - or maybe overheating? I know my laptops underclock themselves quite a bit when it is idle.


It's not overheating, and I tried putting a load on the machine and it just still stayed at 0.60GHz.




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  #1046573 16-May-2014 20:19
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What happens when you change the power settings to High Performance?



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  #1046653 16-May-2014 21:16
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Andib: What happens when you change the power settings to High Performance?


Unfortunately nothing. Still locked at 0.60GHz.




 
 
 
 


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  #1046705 16-May-2014 22:04
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are you running it on battery or AC?





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  #1046726 16-May-2014 22:40
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Get CPUZ and see if it shows different speeds. check the Advanced Power options - how is the CPU cooling (Active or Passive?)







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  #1046851 17-May-2014 09:57
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l43a2: are you running it on battery or AC?


Right now I'm on AC. And I think we just hit the jackpot there! When I remove it from AC the clock speed is back to normal again!








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  #1046852 17-May-2014 09:59
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freitasm: Get CPUZ and see if it shows different speeds. check the Advanced Power options - how is the CPU cooling (Active or Passive?)



On battery: Passive
On AC: Active

I just tried unplugging it from AC and speeds go back to normal, but when I plug in the AC it stays at 0.60GHz. Would this have anything to do with it?

The Maximum processor state are the same for both battery and AC.




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  #1047093 17-May-2014 17:04
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it seems to be a common issue with this model after a quick google search.







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  #1047155 17-May-2014 19:07
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I've now concluded that it only happens when it is plugged in to AC.






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  #1047445 18-May-2014 14:39
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So is there a setting somewhere that is borked or something that is making the CPU speed locked when on AC and not on battery?




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  #1047447 18-May-2014 14:48
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Does this happen if you boot using a Linux Live CD? This would rule out if you have any background programs playing with the Core Speed.

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