LG 27GN950 brightness flickering

ratirt · Apr 1, 2021

Hi Everybody,
I got a new monitor some time ago but I've noticed some strange things happening. The brightness is flickering sometimes in games or when I'm doing nothing. Adjusting the brightness sometimes helps but not always.
I've read that the problem may concern the VRR and the range the monitor operates at 144Hz. I wonder if anyone has that monitor and noticed same thing. (I'm still trying to figure out the optimal settings) Maybe somebody with a high refresh rate monitor has noticed same thing and been wondering if there's a fix for it or any way to mitigate it. It's not like it changes the game experience or anything but it is annoying.

Thanks for sharing.

ColinB123 · Apr 1, 2021

I haven't noticed any flickering, at any frequency.
There's a LG bios update that pushes the monitor to 160Hz. It takes a dreadfully long time to update (about 30 minutes!).

GerKNG · Apr 1, 2021

very slight brightness flicker is normal with freesync/G-Sync Panels.
it mostly happens at low framerates, very slow movement of a basically static image or loading screens.
some are worse than others. i have a 850 (1440p version) and it happens but it is very subtle (don't know if that's even a word

)

ratirt · Apr 2, 2021

GerKNG said:
very slight brightness flicker is normal with freesync/G-Sync Panels.
it mostly happens at low framerates, very slow movement of a basically static image or loading screens.
some are worse than others. i have a 850 (1440p version) and it happens but it is very subtle (don't know if that's even a word )

same here. It is very subtle and I basically can't see it. I need to take a closer look and really stare at the screen to notice it. I sometimes see it when I'm in the desktop. It's nothing that changes the games experience I just wanted to know if it's just me or others have that us well.
I started playing Horizon Zero Dawn and I've not noticed any brightness flickering. At least yet.

Mussels · Apr 2, 2021

ratirt said:
Hi Everybody,
I got a new monitor some time ago but I've noticed some strange things happening. The brightness is flickering sometimes in games or when I'm doing nothing. Adjusting the brightness sometimes helps but not always.
I've read that the problem may concern the VRR and the range the monitor operates at 144Hz. I wonder if anyone has that monitor and noticed same thing. (I'm still trying to figure out the optimal settings) Maybe somebody with a high refresh rate monitor has noticed same thing and been wondering if there's a fix for it or any way to mitigate it. It's not like it changes the game experience or anything but it is annoying.

Thanks for sharing.

I see that on my 32" monitors when VRR/freesync is enabled, i found no fix without turning off VRR/freesync

phanbuey · Apr 2, 2021

It usually happens when you fall below 50 Fps and then above it - when gsync engages/disengages there is a sudden fast dip in brightness that looks like flicker, so if you're sitting at that magic number (whatever it is for that particular panel) it will flicker. Same for the higher end as well - if you're going past about it will flicker - also in loading screens.

ratirt · Apr 3, 2021

Mussels said:
I see that on my 32" monitors when VRR/freesync is enabled, i found no fix without turning off VRR/freesync

I need to check that one out when I get home but what's the point for switching off the VRR/freeSync? Although I will give it a shot.
I think I have the VRR off at the moment. I need to double check.

phanbuey said:
It usually happens when you fall below 50 Fps and then above it - when gsync engages/disengages there is a sudden fast dip in brightness that looks like flicker, so if you're sitting at that magic number (whatever it is for that particular panel) it will flicker. Same for the higher end as well - if you're going past about it will flicker - also in loading screens.

I don't drop below 50FPS in gamnes. It mostly happens on desktop. When I switch to 60hz problem is gone.

Mussels · Apr 3, 2021

ratirt said:
I need to check that one out when I get home but what's the point for switching off the VRR/freeSync? Although I will give it a shot.
I think I have the VRR off at the moment. I need to double check.

I don't drop below 50FPS in gamnes. It mostly happens on desktop. When I switch to 60hz problem is gone.

with a system like mine my FPS doesnt dip very often, so i get a smoother experience without it - i assume its a side effect of freesync on nvidia, but could be that i just have midrange monitors

phanbuey · Apr 3, 2021

Do you have a dual monitor setup?

Mussels · Apr 4, 2021

phanbuey said:
Do you have a dual monitor setup?

yes, but 99% of the time monitor 2 is unplugged (its damaged, i use it when i'm streaming only)

ratirt · Apr 8, 2021

I've tried some stuff with the monitor. I noticed that the flickering happens only with 'game 1' mode set up in the monitor settings. It has a lower brightness and higher contrast ratios. I've manually adjusted the settings (fitting my expectations) and it went away. Could that have been the problem? Brightness and contrast ratios?

System Name	Bro2
Processor	Ryzen 5800X
Motherboard	Gigabyte X570 Aorus Elite
Cooling	Corsair h115i pro rgb
Memory	32GB G.Skill Flare X 3200 CL14 @3800Mhz CL16
Video Card(s)	Powercolor 6900 XT Red Devil 1.1v@2400Mhz
Storage	M.2 Samsung 970 Evo Plus 500MB/ Samsung 860 Evo 1TB
Display(s)	LG 27UD69 UHD / LG 27GN950
Case	Fractal Design G
Audio Device(s)	Realtec 5.1
Power Supply	Seasonic 750W GOLD
Mouse	Logitech G402
Keyboard	Logitech slim
Software	Windows 10 64 bit

System Name	Self-built
Processor	AMD R7 5800X3D
Motherboard	ASUS Prime B550 Plus
Cooling	Scythe FUMA 2 + various case fans
Memory	16GB: Corsair CMK16GX4M2D3600C18 at 3800C16
Video Card(s)	Gigabyte Eagle RTX3070
Storage	2x WD Black m.2 nvme 1TB, WD HDD 6TB, Crucial 750MX300,
Display(s)	LG 27GN950
Case	DeepCool E-Shield
Audio Device(s)	Int: RealTek ALC892, NVidia GA104 HD Ext: LG 27GN950, Behringer DEQ2496, DCX2496, A500. etc
Power Supply	Seasonic Core GM-650SRM
Software	Linux Mint + Windows11 pro
Benchmark Scores	Not worthy of attention

Processor	AMD Ryzen 9 9950X3D
Motherboard	ASRock B850M PRO-A
Cooling	Corsair Nautilus 360 RS
Memory	2x32GB Kingston Fury Beast 6000 CL30
Video Card(s)	PowerColor Hellhound RX 9070 XT
Storage	1TB Samsung 990 Pro, 2TB Samsung 990 Pro, 4TB WD SN850X
Display(s)	LG 27GS95QE-B, MSI G272QPF E2
Case	Lian Li DAN Case A3 Black Wood Edition
Audio Device(s)	Bose Companion Series 2 III, Sennheiser GSP600 and HD599 SE - Creative Soundblaster X4
Power Supply	Corsair RM1000X ATX 3.1
Mouse	Razer Deathadder V3
Keyboard	Razer Black Widow V3 TKL
VR HMD	Oculus Rift S

System Name	Bro2
Processor	Ryzen 5800X
Motherboard	Gigabyte X570 Aorus Elite
Cooling	Corsair h115i pro rgb
Memory	32GB G.Skill Flare X 3200 CL14 @3800Mhz CL16
Video Card(s)	Powercolor 6900 XT Red Devil 1.1v@2400Mhz
Storage	M.2 Samsung 970 Evo Plus 500MB/ Samsung 860 Evo 1TB
Display(s)	LG 27UD69 UHD / LG 27GN950
Case	Fractal Design G
Audio Device(s)	Realtec 5.1
Power Supply	Seasonic 750W GOLD
Mouse	Logitech G402
Keyboard	Logitech slim
Software	Windows 10 64 bit

System Name	Rainbow Sparkles (Power efficient, <350W gaming load)
Processor	Ryzen R7 5800x3D (Undervolted, 4.45GHz all core)
Motherboard	Asus x570-F (BIOS Modded)
Cooling	Alphacool Apex UV - Alphacool Eisblock XPX Aurora + EK Quantum ARGB 3090 w/ active backplate
Memory	2x32GB DDR4 3600 Corsair Vengeance RGB @3866 C18-22-22-22-42 TRFC704 (1.4V Hynix MJR - SoC 1.15V)
Video Card(s)	Galax RTX 3090 SG 24GB: Underclocked to 1700Mhz 0.750v (375W down to 250W))
Storage	2TB WD SN850 NVME + 1TB Sasmsung 970 Pro NVME + 1TB Intel 6000P NVME USB 3.2
Display(s)	Phillips 32 32M1N5800A (4k144), LG 32" (4K60) \| Gigabyte G32QC (2k165) \| Phillips 328m6fjrmb (2K144)
Case	Fractal Design R6
Audio Device(s)	Logitech G560 \| Corsair Void pro RGB \|Blue Yeti mic
Power Supply	Fractal Ion+ 2 860W (Platinum) (This thing is God-tier. Silent and TINY)
Mouse	Logitech G Pro wireless + Steelseries Prisma XL
Keyboard	Razer Huntsman TE ( Sexy white keycaps)
VR HMD	Oculus Rift S + Quest 2
Software	Windows 11 pro x64 (Yes, it's genuinely a good OS) OpenRGB - ditch the branded bloatware!
Benchmark Scores	Nyooom.

LG 27GN950 brightness flickering

ratirt

ColinB123

GerKNG

ratirt

Mussels

Freshwater Moderator

phanbuey

ratirt

Mussels

Freshwater Moderator

phanbuey

Mussels

Freshwater Moderator

ratirt

System Name	stress-less
Processor	9800X3D @ 5.42GHZ
Motherboard	MSI PRO B650M-A Wifi
Cooling	Thermalright Phantom Spirit EVO
Memory	64GB DDR5 6600 1:2 CL36, FCLK 2200
Video Card(s)	RTX 4090 FE
Storage	2TB WD SN850, 4TB WD SN850X
Display(s)	Alienware 32" 4k 240hz OLED
Case	Jonsbo Z20
Audio Device(s)	Yes
Power Supply	Corsair SF750
Mouse	DeathadderV2 X Hyperspeed
Keyboard	65% HE Keyboard
Software	Windows 11
Benchmark Scores	They're pretty good, nothing crazy.