27 inch iMac 2017 & OS10.13.3 - breaking our i1Profiler display profiling. (for us only?)
Hi List members We have been profiling the display in our labs for many years now. This year we have refreshed many of our leased computers with 2017 27inch iMac retina 5K (model identifier 18.3). We are experiencing this issue with JUST the new 2017 iMac hardware (v18.3) running OS 10.13.3 (and .2). Not our older iMacs. Is anyone else having problems (outlined below). Or is it just us? The issue In Brief When i1Profiler adjusts the display brightness to our 120cdm target using automatic display adjustment (ADC) the screen brightness changes just as I would expect it to. However on our new 2017 27inch iMac retina 5K (model identifier 18.3), the OS is not updating the position of the brightness slider in the user interface of the System Preference / Displays to reflect the changes made by i1Profiles ADC. So the position of the brightness slider in the user interface stays in it’s earlier uncalibrated state. After i1profiler reads the patches there is a “verify” step. Something in the verify step is causing the OS to touch the System Preference / Display pane. The OS then sees the (unmoved) position of the brightness slider in the user interface and forces the display back to it. i1 profiler then measures this and reports it as the achieved target brightness. A Quick Test. If someone with a 2017 27 inch iMac (v18.3) with i1Profiler wants to run this test can they email to let me know they find. - Set system preference brightness slider to 100. - set target brightness in i1Profiler to 120 cdm - run i1profiler using ADC. ( the screen should get dimmed) - watch carefully during the Verify step. - Do you see the brightness of the screen suddenly jump back to 100? Please kindly let me know. Thanks for your help. Regards Peter Miles PS : Manual adjusting not working either. I tried to use the manual brightness adjustment method in i1Profiler to bypass this bug / issue. But on these new machines that does not work as the System preferences pane can’t be brought to the foreground when i1Pofiler has got the measurement window up.
Hi List members Just an update. We are seeing the same problem i outlined before with i1Profiler 1.7.2 and os10.13..3, but now also on our mid 2015 iMacs (model 15.1). So it’s now looking more like this is an OS issue and less like a machine specific related bug as we first thought. We tested a clean install of OS 10.13.3 on a clean partition with no addition components added to OS on a mid 2015 iMac. We then installed i1Profiler 1.7.2 and tested it. Summary 1: If the initial iMac display brightness is set to 100, i1Profiler ’s automatic display brightness control (ADC) works. But the display brightness jumps back to 100 during i1Profilers verify step at the very end. So ADC not in a usable state with OS10.13.3 at this time. 2: Manual brightness adjustment. The system Display preference pane cannot be bought forward while i1Profilers measurements pane is active in OS 10.13..3 so the brightness slider cannot be adjusted this way. As a work around you can hit the back button to get out of i1Profilers measuremnet pane. Open the Stystem display preferences and guesstimate an adjustment for the brightness slider. Relaunch i1Profilers measurement pane and look at the updated Display reading. Keep iterating this process till you reach the target brightness. XRite are seeing the same issue and are in the process of resolving this problem. Our software engineers are in the process of reporting what they are finding to the apple developers bug page. regards Peter Miles
Haven’t used ADC in years - it has a long history of being problematic and using it makes you vulnerable to problems like this. Adjusting the brightness manually is flawless. Good to hear XRite is addressing it nonetheless. I wish i1Profiler would remember the display calibration settings previously used. That would make it soo much easier for the non-nerdy average user. Just relaunch the app and re-calibrate with the same settings they used last time. As it stands now, the average non-nerdy person can’t remember what they did last time, they try again with the wrong settings and give up when it doesn’t look right. Little things like stickiness really matter. Scott Martin www.on-sight.com
participants (2)
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Miles, Peter
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Scott Martin