# iOS 27 HDMI Output Issues Persist After Software Update iPhone users report external display playback failures when devices are locked. - **Source:** [GSMArena.com - Latest articles](https://brifing.si/source/ae58cd90-1e26-4445-9a9c-963b7954a50c) - **Published:** 2026-11-07 - **Topic:** [technology](https://brifing.si/c/technology) - **Original article:** - **On Brifing:** https://brifing.si/s/44a06d5d-b588-4efb-920c-5d04b09c3e84 ## Unexpected HDMI Playback Failure Following the release of iOS 27, iPhone users have encountered a significant issue regarding external video playback. Previously, users could connect their devices to external monitors via HDMI and lock their screens while the stream continued. Now, locking the screen immediately terminates the video feed, disrupting standard viewing experiences for many users. ## Inconsistent App Performance The bug does not affect all applications equally, suggesting a shift in how iOS handles external display permissions. Internal tests confirmed that while YouTube and Netflix fail to maintain playback when the screen is locked, the VLC media player continues to function perfectly. This discrepancy highlights that the issue is likely software-dependent. ## New System Permission Rules Investigations reveal that iOS 27 introduced a new requirement for developers to explicitly register external display video sessions. Previously, the operating system granted these permissions automatically to all applications. This structural change forces developers to update their specific app code to comply with the new system rules for external video output. ## Limited Temporary Workarounds Currently, there is no official fix for this problem, leaving users with inconvenient workarounds. The only way to maintain a continuous video stream is to keep the iPhone screen unlocked at all times. Users are advised to lower screen brightness to conserve battery, though this remains a difficult task during extended viewing sessions. ## Impact on AR Hardware The inability to lock the screen while outputting video creates significant challenges for users of AR glasses, such as the XREAL Air 2. Since these devices rely on a constant connection, keeping the phone screen active without accidental touches is difficult. This limitation effectively degrades the utility of external wearable display hardware. ## Persistence Across Updates The HDMI issue was first identified in September alongside the initial iOS 27 release. Despite the subsequent rollout of the iOS 27.2 update, the problem remains unresolved for the majority of affected users. Apple has not yet issued a specific patch or official statement addressing this change in external display permission protocols. ## Developer Responsibility Shift Because the issue stems from a change in system rules rather than a traditional software glitch, the burden of resolution falls on third-party developers. Apps must be updated to register their video sessions according to the new iOS 27 framework. Until developers implement these changes, the playback interruptions will likely continue for users. ## Broader Ecosystem Context Comparisons to historical mobile connectivity show that external video output has been a staple feature since the iPhone 4 era. While competing platforms like Samsung's S10+ offer robust features like DeX support, Apple's recent policy change complicates this functionality. Users now await further updates to see if Apple will restore previous ease-of-use. ## Sources covering this story - https://www.gsmarena.com/ios_27_users_report_hdmi_output_issues_and_theres_no_fix_in_sight-news-75385.php — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._