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Inspiring
August 15, 2016

P: White balance dropper target location is offset on high-DPI Windows devices

  • August 15, 2016
  • 54 replies
  • 3266 views

There appears to be a bug affecting all recent versions of Lightroom on high-DPI Windows devices. It affects both CC and standalone versions, up to and including the current version (2015.6.1).

The issue is that when using the white balance dropper tool in the Develop module, the target location Lightroom uses does not correspond exactly to where the point of the dropper is located. Specifically, it seems to reference a position about 5 or 6 millimetres above the point of the tool.

The issue also affects the manual defringe dropper in the Lens Corrections panel. Other local develop tools seem not to be affected (brush, spot healing, HSL/Color/B&W picker, etc.).

To be clear: the issue affects Lightroom when the device is used in standard desktop mode with a regular mouse as the pointing device. It is not an issue with the touch screen, the pen or Lightroom's touch mode.

The problem is described in detail with screenshots here (in the original post and in my reply):
https://forums.adobe.com/message/8942657

It's also discussed briefly here:
https://www.reddit.com/r/Lightroom/comments/4wlf4i/lightroom_dropper_bug_on_surface_pro/

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    54 replies

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    Fishweasel
    Inspiring
    March 30, 2020
    I am running a 36” 4K monitor at 125% scaling and the issue still occurs. It’s not just a “tiny monitor” problem.
    C
    COBill
    Known Participant
    March 30, 2020
    4K resolution is meaningless on a 17" display, the human eye cannot see the difference unless it is within a couple of inches. 4K monitors on laptops is just a marketing scam that also has the benefit of reduced battery life. Recommendation: sell the laptop and get one with a FHD display. 
      
    croucrou.com
    croucrou.com
    Participating Frequently
    March 29, 2020
    I have a Lenovo P73 with 17inch 4K
    Setting to 200% or 190% scaling
    and i have the same issue.

    If i set scaling to 175% it solve the problem, but all is too small on un 17inch
    C
    ChrigelKarrer
    Inspiring
    March 16, 2020
    I've used Lightroom on HP and Lenovo FHD laptops and it worked fine, no display issuesx


    Again wrong,
    i use Lenovo P70 laptop with 17 inch wide 4K 3840x2860 resulution and i am not able to get rid of this annoying bug. l Al other photo editing software i use and tested don't show this problem, so it's Lightroom related. I use now PhaseOne Capture One and it works just fine.
    C
    COBill
    Known Participant
    March 15, 2020
    Glad to be of assistance. 
    A
    Arnie47
    Known Participant
    March 15, 2020
    „... Is your 28" monitor set to 175% scaling. If not, change it and see the problem disappear.“

    wow, that did the thing. I had set it to 185% scaling with offset documented in this issue.
    Setting to 175% scaling just fixed the problem.
    thank you, guys! That helps a lot.
    E
    edrob
    Known Participant
    March 15, 2020
    I got my answer, thanks for the feedback. It is an Adobe issue that is unlikely to be fixed...soon.  And the work around is to drop the monitor dpi, or reduce the scaling (or get a bigger monitor.)
    C
    COBill
    Known Participant
    March 15, 2020
    Is your 28" monitor set to 175% scaling. If not, change it and see the problem disappear. 
     
    "...photographers forced to use HD mobile equipment ..." HD works just fine, that is 1920x1080. It is 4K where the problem occurs. I've used Lightroom on HP and Lenovo FHD laptops and it worked fine, no display issues. 
      
    A
    Arnie47
    Known Participant
    March 15, 2020
    Still wrong:
    I use a desktop PC together with a Samsung UHD Monitor U28E590 (28") and a dedicated 4k video adapter (Radeon RX470) and DO have the problem (see my post above with the red bass guitar two years ago).
    It's also very annoying when drawing guiding lines in upright mode...

    Of course everybody can always blame cheap or inadequate equipment.
    But the issue does definitely also occur on desktop PCs with dedicated video adapters and big displays 28".

    But even photographers forced to use HD mobile equipment should be supported.
    It's really frustrating to pay a monthly fee for a program with massively troubling issues being reproducible by Adobe for 4 years and not being tackled.

    C
    COBill
    Known Participant
    March 15, 2020
    Still wrong. My 32" monitor is at 150% and the 27" at 175%. No issues. This is purely a 4K on a tiny monitor issue. 
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