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thinkpad-owner1
Blue Screen Again
Posts: 3
Registered: ‎01-08-2019
Location: US
Views: 4,042
Message 1 of 6

T480s (no dGPU) Screen Flickering / Blackout, Issue with Intel?

Hi,

 

I bought a T480s back in December 2018 and have noticed this problem in the title for quite a while now. I'm running the following:

 

  • Processor: i7-8650U
  • No MX150
  • Graphics: Intel UHD 620
  • Screen: WQHD

Multiple times throughout the day my screen will flicker or momentarily black out sections (typically the bottom portion) of it. It doesn't happen as often when fewer applications are open, but it still occurs even then. It doesn't appear to be a hardware issue, given that I've tried moving the laptop back and forth, shook it gently etc. to try to reproduce the strange behavior.

I tried updating the Intel drivers only for the problem to worsen -- updating the driver to the November version (25.x something) caused the computer to additionally black out the screen entirely at times, which could only be resolved by putting the laptop to sleep and waking it up again!

 

I've decided to install version 24.20.100.6223 of the Intel 620 UHD driver, and I'm hoping it works without a hitch, but has anyone else had and resolved this sort of issue before?

 

Or if some Lenovo staff are around, is there a solution?

 

I'd really like to send it back for a replacement but my schedule won't allow me and I'd be out of a laptop for work.

LordZog
Punch Card
Posts: 13
Registered: ‎09-09-2018
Location: CA
Views: 3,972
Message 2 of 6

Re: T480s (no dGPU) Screen Flickering / Blackout, Issue with Intel?

 

In the Intel Graphics Control Panel, disable Panel Self-Refresh for plugged in and Battery also.. There are 2 sections to change. This fixed it for me.

thinkpad-owner1
Blue Screen Again
Posts: 3
Registered: ‎01-08-2019
Location: US
Views: 3,935
Message 3 of 6

Re: T480s (no dGPU) Screen Flickering / Blackout, Issue with Intel?

Your method seems to have solved it! Thanks a lot! Smiley Happy

jchandler06
What's DOS?
Posts: 2
Registered: ‎08-21-2019
Location: US
Views: 431
Message 4 of 6

Re: T480s (no dGPU) Screen Flickering / Blackout, Issue with Intel?

I didnt see an option for "Plugged In", only Battery.  Plugged in is blank.  Where is this at?

thinkpad-owner1
Blue Screen Again
Posts: 3
Registered: ‎01-08-2019
Location: US
Views: 323
Message 5 of 6

Re: T480s (no dGPU) Screen Flickering / Blackout, Issue with Intel?

It should appear in the sidebar of the Intel Graphics Control Panel.

 

Capture.JPG

 

jchandler06
What's DOS?
Posts: 2
Registered: ‎08-21-2019
Location: US
Views: 133
Message 6 of 6

Re: T480s (no dGPU) Screen Flickering / Blackout, Issue with Intel?

Mine is blank.  So is the person Im trying to help.  See attached.Graphics Power.PNG

 

 

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