Hello Apple Engineering Team,
I'm submitting a detailed technical report regarding a USB-PD charging regression affecting the iPad Pro 12.9" (M2) in iPadOS 27 Public Beta 2. This appears to be a recurring firmware-level issue across multiple beta cycles.
TECHNICAL SPECIFICATION: • Device: iPad Pro 12.9" (A2766 / M2 SoC) • Storage Configuration: 512GB NAND • Current Build: iPadOS 27 PB2 (24A5390f) • Feedback ID: FB24178289
PHENOMENOLOGY:
- USB-C port fails to negotiate Power Delivery after beta installation
- Device draws minimal standby current (charging icon appears but doesn't stabilize)
- Flashing red battery icon persists through extended cold charging (>10 hours)
- Force restart does not clear the USB controller state
- Battery management subsystem appears functional but USB-PD handshake blocked
ISOLATION TESTING: • Hardware elimination: 16 USB-C ports across 7 chargers tested (UGREEN, Anker certified) • Cable verification: 60W and 100W USB-C cables confirmed working on companion devices • Cross-platform validation: iPhone 12 and iPhone 14 Plus on identical iOS 27 beta charge without issue • Network connectivity: WiFi/BT functional when device can boot (pre-brick state) • Conclusion: Fault localized to M2 power management firmware, not peripherals or general OS stack
RECURSION HISTORY: • iPadOS 18 Beta 2: Similar USB-C charging failures on M2 devices (public reports on r/iPadOS) • iPadOS 26 Beta 9: USB-C completely disabled for charging/connecting (Facebook iOS Beta community) • iPadOS 27 Public Beta 2: Recurrence of identical symptom set
POWER MANAGEMENT SUBSYSTEM ANALYSIS: The M2 architecture implements USB-C PD negotiation at the S0ix power state transition layer. The fact that minimal standby current flows but full PD handshakes fail suggests a firmware-state corruption in the power delivery controller that survives normal reboot sequences but may require full power-cycle or firmware rewrite to restore.
REQUESTED ACTION ITEMS:
- Firmware diagnostics on affected M2 power management subsystem
- DFU-mode USB controller reinitialization protocol verification
- Engineering acknowledgment of Feedback ID FB24178289
- Prioritized investigation of recurring M2 USB-PD regressions across beta cycles
- Interim recovery guidance for affected users pending permanent fix
USER IMPACT CONTEXT: This failure renders the device nonfunctional for users reliant on specific hardware configurations. In this case: religious observance apps requiring 512GB local storage + academic workload starting August 26. No alternative device available for equivalent functionality.
I am available for additional diagnostic cooperation or test build evaluation as needed.
Respectfully, Jason Bulnes Feedback ID: FB24178289