Some iPhone users running iOS 27 report that video playback stops on TVs and monitors connected through HDMI when they lock their phones. The problem appears to affect certain applications and external-display setups rather than every iPhone or video player. As of November 7, 2026, there is no confirmed general fix for the reported playback interruptions.
Reports of external-display playback problems began appearing around the September 2026 release of iOS 27. Some users described videos playing normally while their iPhones remained unlocked, only for playback to stop after the devices were locked. Similar complaints have continued into November, although the available reports do not establish how many iPhone users are affected.
Before iOS 27, users with compatible iPhones could connect their devices to an external display through HDMI. Apple’s iPhone display connection guide explains how supported iPhones connect to a TV or monitor using a compatible cable or adapter. Users could then start a video, lock their phone, and continue watching on the larger screen. However, this feature is no longer working properly for some users after the software update.
Readers interested in wired display connections can explore TechBonafide’s guide to HDMI and USB-C adapters to understand common connector types and compatibility considerations. Before choosing an accessory for an iPhone, it is important to confirm that the adapter supports video output from the phone to an HDMI display.
YouTube and Netflix are among the applications reported to experience HDMI playback interruptions when an iPhone is locked. Published hands-on testing reproduced the problem in both applications, while VLC continued playing video on the connected display. These different results suggest that the issue does not affect every video application in the same way. However, the behavior may vary depending on the application version, iPhone model, and connected accessories.
Apple’s developer guidance for presenting content on a connected display explains that, beginning with iOS 27, applications using a noninteractive external-display scene must register a scene accessory. In earlier iOS versions, the system connected this type of scene automatically unless the application opted out. This documented change may help explain why some video applications behave differently on connected displays, although it does not establish the cause of every reported playback interruption.
The different results do not prove that every application is affected by the same technical problem. VLC can play local video files, while YouTube and Netflix use separate streaming systems and playback restrictions. Although Apple’s updated external-display requirements may help explain the interruptions, it remains unclear whether those changes, individual application updates, or other compatibility issues are responsible for each reported failure.
The reported playback interruptions are particularly inconvenient for people who regularly watch videos on larger screens or use compatible display glasses. In an Infuse support discussion, users of XREAL and other display glasses described changes in external-video output after updating to iOS 27. These reports include screen-mirroring problems and do not necessarily describe the same HDMI lock-screen failure seen in YouTube and Netflix. However, they show how external-display changes can affect different accessories and applications.
A temporary workaround for affected applications is to keep the iPhone unlocked during HDMI video playback and reduce screen brightness when practical. However, this can increase battery consumption and leave the screen exposed to accidental touches. Users who notice unusual warmth during longer viewing sessions can also read TechBonafide’s guide explaining why an iPhone gets hot. These steps may make the situation more manageable, but they do not fix the underlying playback problem.
As of November 7, 2026, users have continued reporting HDMI playback interruptions even after updating to iOS 27.2. There is no publicly confirmed timeline for a general fix. Apple’s updated external-display framework may require changes to some applications, but it has not been established whether an iOS update, an application update, or a combination of both will resolve every affected setup.
For now, affected iPhone users can test playback with their screens unlocked, check for application updates, and monitor future iOS releases. Those using compatible TVs or streaming devices can also explore Chromecast streaming and screen-sharing options as a separate way to watch supported content on a larger screen. Wireless casting is not a confirmed fix for the HDMI issue, but it may offer another viewing option depending on the application and display.
