I looked at it during the last days, an it not only happens with high brightness, the flash also appears at rather low brightness settings.
I’m having the same problem, but much more frequent than every three days. I’d say I experience it about 3 times a day. Very annoying issue.
I tried to screenshot the bright flashing screen. That caused the bright flashing to take longer to go away (ca. 15 seconds instead of 2). On the screenshot, everything is normal.
Edit: I now think that this would occur when the lighting conditions are changing fastly. I still don’t have an idea to reproduce this. I have that not only in the bus now, but I haven’t noticed that in the nighttime.
I guess that you already disabled adaptive brightness…
No?! (Is this important?)
Well there’s (at least) a known bug related to this: https://forum.fairphone.com/t/screen-flickers-at-low-brightness/11577. Maybe disabling it solves your problem.
I disabled it.
I had now a flashing though. Re-enabled adaptive brightness.
I have found a video of a Fairphone 2 flashing. It flashes at 0:23.
Well, this video is not from me.
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I have had these bright flashed since last fairphone update. They seem indeed be occurring mostly when changing from light to dark environment (out other way around).
The flash is far brighter than the brightest setting of the display. Test is not readable anymore and colours are nearly white.
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Same here.
Since the new update I’ve got the flash. Mostly when I reactivate my FP2 from sleeping mode.
It looks like the video shown above.
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I’ve also started getting the flash described, I don’t remember it happening before the software update but now it happens for a second or two almost half the times I wake up the screen (not any other times though). I also still get the flickering low brightness problem but adaptive brightness has been disabled for some time.
I was hoping the new update would fix it, but I’m still having this issue…
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Hi!
I can confirm the brightnessflashes. It happens pretty much randomly but i’d agree to seeing it more often after i wake up the phone.
It definetly can happen during normal usage (browsing, etc) also.
I had it on my first fp2 in Dec 15 and now on my second fp2, so i dont think it is related to the update.
I’d like to hear what Fairphone already honestly knows about this and the flickering issues, what it is related to, if it is solvable. It is 6months after launch, this should be investigated and communicated for the sake of transparency. @Douwe
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Same flashing brightness behaviour here.
I also sometimes have these white flashes, but to me they seem to happen at random occasions. I actually thought it had to do sth with the software flipping it and ‘rebuilding’ the image, but I haven’t checked whether it might be related to CPU use or sth.
Ok, i gotta admit i was a little pissed when writing my previous post here.
But to my surprise fairphone rolled out this (unannounced?) update and solved the flickering screen entirely on my phone. 
Great work! I can even use adaptive brightness now.
I’m not sure if the brightness flashes disappeared too, but they are not that much of a problem imo.
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The flickering really diappeared with the last 1.3.6 update, that is really nice.
But I still have those occasional bright flashes/inversions of the screen. It is not really annoying, but still unexpected and I am not sure if it is “good” for the display unit…
I have the same issue. Would be nice to have it fixed, but this is not a showstopper for me to use the phone.
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Same here 
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