Flashing
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It should be under System Preferences > Displays. The behavior you're describing definitely sounds like that's what is happening. :( I see you have "automatically adjust brightness" checked in that screenshot, so try unchecking it.
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I am experiencing the same issue with f.lux 'flashing' (disabling for half a second might be a better description) when manually adjusting the brightness at night. I'm running a MacBook Air with an external monitor and the 10.11 public beta. I'm using a relatively old 24" Cinema Display and can't see any options relating to ambient brightness in System Preferences -> Displays.
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@lorna said:
It should be under System Preferences > Displays. The behavior you're describing definitely sounds like that's what is happening. :( I see you have "automatically adjust brightness" checked in that screenshot, so try unchecking it.
I don't have the setting either (and am experiencing the flashing). The auto-brightness setting doesn't fix the issue I'm afraid.
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The new Mac beta is working better when we write a color profile all the time. ("writeProfile")
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@herf does that use more CPU power?
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@herf I'm not sure how to enable this "writeProfile" in a color profile, but happy to follow any steps and report back what I get from testing.
I can confirm that toggling the auto-brightness setting doesn't seem to have any affect on the flashing issue.
When I try to 'calibrate' my internal display the Display Calibrator crashes unexpectedly and I get an error report - not sure if that's related, points to an issue with apple or would provide anything helpful here, but happy to report if so.
Thanks again everyone.
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I was happy to find this thread and disable the 'Automatically adjust brightness' setting but alas, the flashing continues. (As someone else mentioned, it's like Flux gets disabled for half a second. Repeatedly.)
I'm on a mid-2012 MacBook Pro and using both the laptop screen and a Dell U2713HM .
Is the Beta that the team members have mentioned available to the public?
-Wendy
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@Breezio are you using more than one monitor? The Feature is named Ambient Light Compensation.
@lorna
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@wsmoak I haven't seen an available beta. I emailed and asked if the software had an open-source license and a public repo but got no response as of yet. Would love to help with debugging and trying to figure out how best to do that :)
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@lorna Not all macs have the option to toggle ambient light compensation. My 2013 Retina MBP doesn't have it as an option in the displays preference pane when using the built-in or external displays.
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@seajay Can you describe exactly what's happening on your 2013 MBP? Is it new with El Cap? I'm thinking there are two different problems we're talking about.There are some problems with flashing when the GPUs switch, and that is a different (but similar) issue to the Ambient Brightness El Capitan problem. No publicly available beta yet but soon.
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@lorna Yeah, absolutely. It's new with El Cap - been using flux for years on osx without issue before. The symptom presents itself when manually adjusting brightness using either the keyboard (f1/f2) controls or dragging the slider in System Preferences>Displays. Any manual change to brightness results in flux flashing off until the new brightness locks in, which is pretty jarring at night.
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This is super helpful, thanks. Hope we have a good answer for you soon. Meanwhile if you want, you could try gfx.io to lock one or the other card (I'm maybe making a big assumption that it's dual GPU here) and see if you can track down which one is causing the problem.
@seajay said:
@lorna Yeah, absolutely. It's new with El Cap - been using flux for years on osx without issue before. The symptom presents itself when manually adjusting brightness using either the keyboard (f1/f2) controls or dragging the slider in System Preferences>Displays. Any manual change to brightness results in flux flashing off until the new brightness locks in, which is pretty jarring at night.
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@lorna Tried gfx.io and received the following error:
- You are using a system that gfxCardStatus does not support. Please ensure that you are using a MacBook Pro with dual GPUs.
That jives, since I'm fairly certain all 13" Macbooks use integrated graphics cards. The 2013 retina mpbs use Intel HD Graphics 4000.
Of note, I tried disabling rootless and that fixed the problem.
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Oh boy, that is very interesting, thank you for the update. Wow.
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@seajay Yeah, I know that's probably not the answer you were hoping for. I disabled rootless to see if it would help me get more functionality out of iStat Menus, which did work. It also fixed f.lux, which was an unexpected but much appreciated side effect.
I know most users should definitely NOT be disabling rootless, since it's an important security measure. Still though, it's nice to have my old apps working properly again.
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Thanks for letting us know anyway, it's useful to know. I'm glad you got it fixed for now.
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As of the latest El Capitan (beta 4) I can confirm that on a 2015 13" macbook pro the "Ambient light compensation" option appears and, when disabled, fixes the flashing issue.
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I am on a 2013 13" RMBP on PB2 (aka Developer Beta 4) - there is no option to disable ambient light compensation
Also yes, all 13" RMBPs do not have dual graphics cards - there is only Intel Integrated Graphics
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@nchan2177 said:
I am on a 2013 13" RMBP on PB2 (aka Developer Beta 4) - there is no option to disable ambient light compensation
Also yes, all 13" RMBPs do not have dual graphics cards - there is only Intel Integrated Graphics
Yeah, still same deal on beta 4 with my 2013 13" rMBP. No ambient light option. Still have to disable rootless to get flux to work.
