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ahickingbottom
Fanfold Paper
Posts: 8
Registered: ‎01-02-2018
Location: CA
Views: 4,730
Message 1 of 7

ThinkPad P52s - screen flicker when plugging in AC adapter

Whenever I plug in the supplied USB-C AC adapter to charge the laptop I get a black screen flicker for about a second. Is there a way to prevent this? It's not a really big deal its just something that never happened on previous ThinkPad models I've owned (T570, T460s)

Saturn5
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Posts: 3
Registered: ‎02-28-2018
Location: US
Views: 4,660
Message 2 of 7

Re: ThinkPad P52s - screen flicker when plugging in AC adapter

I have the same problem when I plug in and also unplug the AC adapter. And my fan is always on...

Community SeniorMod
Community SeniorMod
Posts: 7,488
Registered: ‎01-13-2008
Location: US
Views: 4,656
Message 3 of 7

Re: ThinkPad P52s - screen flicker when plugging in AC adapter

My WAG: your power profiles are set up to use different refresh rates on AC and battery.  It takes the monitor a second to accomodate.  You could try fiddling those settings if it's bothersome.

 

Can't even guess as to the fan issue.  Does Task Manager show a particular process chewing up CPU?

 

Z.


The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.


The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored - questions and answers belong in the forum so that others may contribute and benefit. ... GeezBlog

 

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ahickingbottom
Fanfold Paper
Posts: 8
Registered: ‎01-02-2018
Location: CA
Views: 4,634
Message 4 of 7

Re: ThinkPad P52s - screen flicker when plugging in AC adapter

Thank you for the tip zoltanthegypsy! I was able to fix the screen flickering by doing the following:

 

  1. Right click desktop and open "Intel Graphics Settings"
  2. Go to the "Power" section
  3. Under Global Settings, click disable for "Diplay Refresh Rate Switching"
Saturn5
Fanfold Paper
Posts: 3
Registered: ‎02-28-2018
Location: US
Views: 4,613
Message 5 of 7

Re: ThinkPad P52s - screen flicker when plugging in AC adapter

Thank you for your tip.

 

For the fan issue, just when I'm typing this, I open the Lenovo Vantage app, the cpu load is just under 10%, but the fan is spinning very fast..

 

I'll try to contact lenovo this weekend...

PhantexGuy
Paper Tape
Posts: 2
Registered: ‎05-06-2018
Location: US
Views: 3,884
Message 6 of 7

Re: ThinkPad P52s - screen flicker when plugging in AC adapter

The fan issue is an apci bug. There is a patch coming soon.

KennyLee1692
What's DOS?
Posts: 1
Registered: ‎10-09-2019
Location: MY
Views: 806
Message 7 of 7

Re: ThinkPad P52s - screen flicker when plugging in AC adapter

Yes, this solved my problem.  Appearantly it can be done using this small tweak!! Thanks

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