Hello, I am experiencing an unexpected reboot on my iPhone while it is idle and locked.
Device information Device: iPhone 17 Pro Max Model identifier: iPhone18,2 iOS version: iOS 27 Beta 4 Build: 24A5390f
The issue occurred while the phone was locked and not actively being used. The device entered sleep, briefly woke, and then restarted. The panic log confirms that the device was locked at the time of the crash.
The main panic string is: GFX crash of unknown type 0x80a Exception class=0x2f (SError interrupt) agx_scheduler(2) The panic initiator is also listed as: panicInitiator: GFX This appears to be related to the GPU or graphics subsystem, possibly during a display sleep/wake or lock-screen transition.
I have already tried the following: Disabled Always-On Display Disabled StandBy mode Changed the Lock Screen to a static wallpaper without motion or depth effects Removed Lock Screen widgets Disabled Live Activities Disabled Raise to Wake Disabled Tap to Wake Enabled Reduce Motion Enabled Limit Frame Rate Restarted the device
The problem does not appear to be caused by low storage or thermal pressure. The device had sufficient free storage, and the panic report showed no thermal pressure at the time.
I also found reports from other users describing the same panic string, particularly: GFX crash of unknown type 0x80a agx_scheduler(2) Some users reported that the issue continued even after restoring the device and setting it up as a new iPhone without restoring a backup.
Has anyone else encountered this exact GFX panic on iOS 27 Beta 4?
Is this believed to be a software regression in the GPU driver or display sleep/wake handling, or could it indicate a hardware issue?
I have submitted the panic log through Feedback Assistant as well.
Thank you.