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iPhone Duo screen brightness spikes up when closing/opening

Hi everyone, I'm running into a strange bug on my folding iPhone running iOS 27.1 (and it still persists after updating to the iOS 27.2 RC).


Sometimes when I open or close the device, the screen brightness suddenly flashes/spikes up. I have auto brightness off.


  • The workaround: If the bug happens, swapping the wallpaper to a different image instantly makes the issue go away until it randomly triggers again later.

Has anyone else experienced this display glitch during folding transitions, or found a fix? Thanks

4 replies

Expressing or conveying visual experiences effectively through these forums may be challenging. The underlying visual issue on your iPhone cannot be accurately diagnosed online. Factors such as your iPhone's specific settings, visual defects, and potential hardware problems cannot be assessed through this method. For more personalized and in-depth assistance, I recommend securing a Genius Bar Reservation and exploring the various support options provided by Apple.


Get a Genius Bar Reservation and Apple Support Options - Apple

When you encounter issues with your Apple devices, the Genius Bar at Apple Retail Stores is the go-to place for expert assistance. The Genius Bar is staffed by knowledgeable Apple employees, often referred to as "Geniuses," who can diagnose and resolve a wide range of hardware and software-related problems. To ensure personalized attention and a convenient visit, Apple provides the option to schedule a Genius Bar Reservation.


Contact Genius Bar.

Manage Reservations - My Reservations - Apple



Take your device to an Apple Retail Store or Apple Authorized Service Provider, or contact Apple Support:

  1. If you prefer face-to-face assistance, you can visit an Apple Retail Store. Apple Retail Stores are designed to provide a hands-on experience with Apple products and offer support services. You can speak with Apple specialists, known as "Creative Pros" in some locations, who can assist you with product-related inquiries or minor troubleshooting.
  2. In addition to Apple Retail Stores, there are Apple Authorized Service Providers (AASPs) that are authorized to perform repairs on Apple products. AASPs are independent businesses certified by Apple to offer service and repairs for various Apple devices.
  3. If visiting a physical location is not possible or convenient, you can seek support by contacting Apple Support. Apple offers various channels for support, including phone support, live chat, and email. The official Apple Support website provides information on how to reach out to Apple for assistance.


Finally, you can also start a repair log or track the status of existing repair --> Apple Repair and Repair Status Check - Official Apple Support


In summary, Apple provides customers with a range of support options, including the Genius Bar Reservation system, visits to Apple Retail Stores or Authorized Service Providers, and various channels to contact Apple Support for assistance with their products. These services aim to ensure that Apple users receive the necessary help and support whenever they encounter issues with their devices.



dendakhongduong wrote:
(and it still persists after updating to the iOS 27.2 RC).

This is not the right forum to discuss beta


When you experience an issue or something that does not work as expected in beta, send your feedback directly to Apple with Feedback Assistant




Participation Guidelines.

Apple Beta Software Program Agreement. All potential seed participants are asked to click through the Apple Beta Software Program Agreement. Review and use of pre-release software is strictly confidential. Keeping information about pre-release software confidential is critical to Apple's future success and the success of the AppleSeed Program. Please read and comply with the terms of the agreement to avoid legal consequences.


Active Participation. We ask that you use seeded software in your day-to-day activities. You will be testing functionality and usability in environments that can not be replicated at Apple. We will provide you with a variety of tools and forums that will allow you to give us detailed information about your experience.


Feedback Assistant. The app you use to provide your feedback to Apple is Feedback Assistant. On iOS and iPadOS, Feedback Assistant is available on the Home Screen once you install the seed build. On macOS, Feedback Assistant is installed to System › Library › CoreServices › Applications and can be launched with Spotlight.

Important Considerations.


We do not recommend installing pre-release software on personal-critical and/or business-critical systems.

Backups should be maintained to mitigate data loss in the event of an application or system crash. Apple is not liable for malfunctions resulting from the installation of this software. Furthermore, Apple makes no guarantee that data created or modified by this software will be compatible with future versions. Please note that members of the AppleSeed team are not available to assist with troubleshooting and tech support.

Hi, the issue happened on ios 27.1 as well

Hi, the issue happened on ios 27.1 as well