Results 1 to 5 of 5

Hybrid View

  1. #1
    ROG Junior Member Array
    Join Date
    Jun 2015
    Reputation
    10
    Posts
    1

    Unhappy PG27UQ Problem (grey bars/banding)

    I was so excited when I received this monitor today but I immediately found a problem of my monitor. (all settings are default, 98Hz, 10bit, 1080Ti, DP port)

    No matter HDR is turned on or off, there're some grey bars (banding?) when pure white image displayed.
    It's annoying especially pure white scenarios like google search pages.
    Click image for larger version. 

Name:	IMG_0772.jpg 
Views:	8 
Size:	218.9 KB 
ID:	75745
    (photo taken from iphone, running DisplayHDR Test)

    I found the only way to remove them is to turn Variable Backlight off under SDR mode.

    I'm completely satisfied it's HDR performance and I understand this monitor uses local dimming zones/arrays.
    But I don't know these obvious grey bars:
    1. Is just the limitation of local dimming, or
    2. The monitor I received has some problems

  2. #2
    ROG Member Array
    Join Date
    Oct 2013
    Reputation
    10
    Posts
    5

    I started having this problem today. I've had this monitor since June with zero issues, both SDR and HDR function was superb -- until today I've been on a 1080 ti. Today I installed a 2080 ti, and it functions wonderfully -- for several hours I benchmarked a lot of games just testing it out. Then I closed out (iirc) The Evil Within 2, and I suddenly have significant "Variable Backlight" issues in SDR or HDR.

    Huge black blotches across the screen, and banding especially with contrast changes. Whatever this is, it is completely unacceptable - and I hope it's a driver bug, otherwise this $2,000 monitor is now broken.

    I recorded a video trying to demonstrate the problem:
    https://www.youtube.com/watch?v=JBLbYYO_sh4


    (Currently: EVGA 2080 ti XC Ultra @ 411.70 driver)

    Is this what you have xiejiaxuan008 ?? If so, I can assure you it is NOT normal. What video card and driver are you currently using?
    Last edited by kozmik; 09-28-2018 at 09:24 PM.

  3. #3
    ROG Guru: White Belt Array ELIESEH PC Specs
    ELIESEH PC Specs
    MotherboardASUS ROG STRIX X99 GAMING
    ProcessorIntel® Core™ i7-6900K
    Memory (part number)CMK32GX4M4A2400C14
    Graphics Card #1ROG-STRIX-GTX1080TI-O11G
    MonitorACER XB271HU
    Storage #1Samsung SSD 960 EVO 256 GB
    Storage #2Samsung SSD 850 EVO 500 GB
    CPU CoolerHydro Series™ H115i
    CaseNZXT Phantom 820
    Power SupplyCooler Master V1000
    Keyboard Razer BlackWidow Chroma V2
    Mouse Razer DeathAdder Elite
    Headset ASUS Cerberus
    Mouse Pad QcK
    OS Windows 10 Pro
    Network RouterASUS RT-N66U

    Join Date
    Jun 2017
    Reputation
    42
    Posts
    106

    Quote Originally Posted by kozmik View Post
    I started having this problem today. I've had this monitor since June with zero issues, both SDR and HDR function was superb -- until today I've been on a 1080 ti. Today I installed a 2080 ti, and it functions wonderfully -- for several hours I benchmarked a lot of games just testing it out. Then I closed out (iirc) The Evil Within 2, and I suddenly have significant "Variable Backlight" issues in SDR or HDR.

    Huge black blotches across the screen, and banding especially with contrast changes. Whatever this is, it is completely unacceptable - and I hope it's a driver bug, otherwise this $2,000 monitor is now broken.

    I recorded a video trying to demonstrate the problem:
    https://www.youtube.com/watch?v=JBLbYYO_sh4


    (Currently: EVGA 2080 ti XC Ultra @ 411.70 driver)

    Is this what you have xiejiaxuan008 ?? If so, I can assure you it is NOT normal. What video card and driver are you currently using?

    Did you tried to switch back to your old graphics card with old drivers? If the issue persist, means it is a monitor issue!!*

  4. #4
    ROG Member Array
    Join Date
    Jun 2018
    Reputation
    10
    Posts
    10

    Quote Originally Posted by xiejiaxuan008 View Post
    I was so excited when I received this monitor today but I immediately found a problem of my monitor. (all settings are default, 98Hz, 10bit, 1080Ti, DP port)

    No matter HDR is turned on or off, there're some grey bars (banding?) when pure white image displayed.
    It's annoying especially pure white scenarios like google search pages.
    Click image for larger version. 

Name:	IMG_0772.jpg 
Views:	8 
Size:	218.9 KB 
ID:	75745
    (photo taken from iphone, running DisplayHDR Test)

    I found the only way to remove them is to turn Variable Backlight off under SDR mode.

    I'm completely satisfied it's HDR performance and I understand this monitor uses local dimming zones/arrays.
    But I don't know these obvious grey bars:
    1. Is just the limitation of local dimming, or
    2. The monitor I received has some problems
    The banding is a limitation of the FALD backlight local dimming. I have it too and noticed it since I first got the monitor. Totally disappears when FALD is set to off. There's just not enough local dimming zones to really mask it and the algorithm that controls local dimming might be a little too aggressive.

    Also, blue light minimizing programs like f.lux can make screen darkening/banding really stand out. Local dimming can be especially bad with certain desktop backgrounds too where there's sudden shifts in light and dark depending on the picture/background. For example, I have a particular background that will cause browser windows that are white or light grey to have a crazy blue shift or darkening to them depending on where the window is in relation to the desktop background image. Switching to a more uniform desktop background, turning down the variable backlight from Fast to gradual, or just turning FALD/VBL off completely does alleviate the issue.

    That "might" be what's going on in the youtube video of the above poster but it's hard to tell if the algorithm that controls local dimming is just sucking based on his desktop background or if some of the FALD zones on his screen are actually burned out requiring a replacement.

  5. #5
    ROG Member Array GabiPavel PC Specs
    GabiPavel PC Specs
    MotherboardASUS SABERTOOTH Z170 S
    ProcessorIntel Skylake Core i7 6700K
    Memory (part number)Corsair Vengeance White LED 16GB DDR4 3000MHz CL15
    Graphics Card #1Inno3D GeForce GTX 1080 iChill X3
    MonitorASUS Gaming ROG Swift PG278Q
    Storage #1SSD HyperX FURY 120GB / SSD ADATA XPG SX930 240GB
    Storage #2WD Blue 1TB SATA-III 7200 RPM 64MB
    CPU CoolerCPU ARCTIC AC Liquid Freezer 240
    CaseCooler Master STORM Stryker
    Power SupplySuper Flower Leadex Gold 650W White
    Keyboard Logitech G810 Orion Spectrum RGB
    Mouse SteelSeries Rival 700
    Headset Creative SoundBlaster Tactic Alpha
    Mouse Pad SteelSeries DeX
    Headset/Speakers Logitech Z313 2.1
    OS Windows 10 PRO
    Network RouterRDS 1000 Mbps
    Accessory #1 Fan controller NZXT Sentry LXE

    Join Date
    Dec 2016
    Reputation
    10
    Posts
    6

    Keep hearing about FALD and turning it on and off? How do you do that? I asked ASUS live support and they were clueless
    I7 6700K OC 4.8@1.345v

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •