How to fix screen flickering on LG 5K Ul...
 

How to fix screen flickering on LG 5K Ultrafine display UPDATED  

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Eightarmedpet
(@eightarmedpet)
Noble Member
Joined: 2 years ago
Posts: 1579
Apr 12, 2018 10:41 am  

Bit of an edge case here, so not sure how many are effected, might link this thread in my sig for visibility.

For those who are unaware, the LG 5K Displays have a habit of flickering from picture to black screen in W10. For me it only happens on Desktop, so not while in game, so was only a minor annoyance, however I accidentally found the fix...

Switch to best performance as per these instructions...

"Adjust your visual effects settings under Start > type performance > Adjust the appearance and performance of Windows > Adjust for best performance > Apply > OK. Head to the Advanced tab of the same window and ensure that Adjust the best performance of: is set to Programs as well."

performance settings

edit: spoke too soon, appears to still have issues when playing youtube videos.

edit 2: I’ve done some more poking about and i may have found a proper fix - by setting Nvidia 3D settings to always prefer the 1070 - as suspected it was the intel igpu that was causing the issue as it was driving the external screen and the 1070 only kicked in when gaming. 

2017 13" MacBook Pro Touchbar + [email protected] (AKiTiO Thunder3) + Win10
2017 13" MacBook Pro Touch Bar + [email protected] (Sonnet Breakaway Box) + Win10

2017 13" MacBook Pro Touch Bar + GTX1070 (debating 2070 upgrade) @32Gbps-TB3 (Razer Core V1) + Win10

2017 13" MacBook Pro Touch Bar + Vega 56 @32Gbps-TB3 (Razer Core V1) + Win10 & macOS 10.14+

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LG 5K Ultrafine flickering issue fix


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theitsage
(@itsage)
Famed Member Admin
Joined: 3 years ago
Posts: 4000
Apr 12, 2018 12:45 pm  

@eightarmedpet Have you installed the latest Intel graphics drivers manually? There are more Energy settings which allows further tuning of the iGPU power consumption. On the 15" MBP, I need to disable the dGPU and attach the Intel iGPU to the internal display. When not connected to a power source, I would experience flickering. This was resolved when I turned off some power saving settings using Intel Graphics Control Panel.

Best ultrabooks for eGPU use

eGPU enclosure buying guide

94 external GPU build guides


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SE12897
(@se12897)
Trusted Member
Joined: 2 years ago
Posts: 56
May 6, 2018 1:09 pm  
Posted by: theitsage

@eightarmedpet Have you installed the latest Intel graphics drivers manually? There are more Energy settings which allows further tuning of the iGPU power consumption. On the 15" MBP, I need to disable the dGPU and attach the Intel iGPU to the internal display. When not connected to a power source, I would experience flickering. This was resolved when I turned off some power saving settings using Intel Graphics Control Panel.

maybe this is the panel self refresh power saving feature you are experiencing? I noticed this on my HP and it caused my to think my trackpad was lagging when in fact it was the display slowing down the refresh rate and causing this slight flickering

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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Eightarmedpet
(@eightarmedpet)
Noble Member
Joined: 2 years ago
Posts: 1579

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mac_editor
(@mac_editor)
Noble Member Moderator
Joined: 2 years ago
Posts: 2080
Sep 9, 2018 4:28 pm  

@eightarmedpet Clear all cookies, caches, etc. for egpu.io - this fixed it for me.

purge-wrangler.shpurge-nvda.shset-eGPU.shautomate-eGPU EFI Installer
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Troubleshooting eGPUs on macOS
Command Line Swiss Knife
eGPU Hardware Chart
Multiple Build Guides
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Current: MacBook Pro RP560X + 480/R9 Fury/Vega 64 | GTX 780/1070
Previous: 2014 MacBook Pro 750M + 480/R9 Fury | GTX 780/980 Ti/1070


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