The iPhone XS Max often restarts, sometimes in an endless loop.
The iPhone XS Max often restarts, sometimes in an endless loop.
My phone frequently restarts, for instance, it suddenly restarts while I'm using it. After the restart, the battery level is at 10%. This 10% lasts a long time, even though it's based on the charge level after reboot. Sometimes, the restart results in a normal battery level, while other times it's at 10%, and this 10% remains constant. Below is my restart analysis report, hoping someone can provide an explanation.
Here's the restart analysis report for reference:
{"bug_type":"210","timestamp":"2023-08-12 23:17:59.00 +0800","os_version":"iPhone OS 16.6 (20G75)","roots_installed":0,"incident_id":"D3F44D40-AA84-4DC1-9E9A-1B1F78F31C2F"} { "build" : "iPhone OS 16.6 (20G75)", "product" : "iPhone11,6", "socId" : "8020", "socRevision" : "11", "incident" : "D3F44D40-AA84-4DC1-9E9A-1B1F78F31C2F", "crashReporterKey" : "0fb9d45f15bc9d0139f8c3f0ef4762bce241074d", "kernel" : "Darwin Kernel Version 22.6.0: Wed Jun 28 20:51:42 PDT 2023; root:xnu-8796.142.1~1\/RELEASE_ARM64_T8020", "date" : "2023-08-12 23:17:59.77 +0800", "panicString" : "panic(cpu 0 caller 0xfffffff02c5e536c): SMC PANIC - ASSERT: smc\/bms\/battery.cpp\n - BMSTask(4)\nASSERT: smc\/bms\/battery.cpp\n\nRTKit: RTKit-2062.142.1.release - Client: AppleSMCFirmware-3424.140.21.0.4.iphone11-imola.REL\n!UUID: b7a3fa21-7489-3aeb-a83d-057e7f95e7ae\nTime: 0x00000005e120f4bb\n\nFaulting task 4 Call Stack: 0x000000000002bfd0 0x000000000002b9a0 0x000000000002b7b0 0x000000000002d860 0x00000000000173b8 0x000000000001ee28 000000000000000000\n\nChinook ASC Async error info: \nl2c_err_sts 0x10001bfc00000000, l2c_err_adr 000000000000000000, l2c_err_inf 000000000000000000\nlsu_err_sts 000000000000000000, fed_err_sts 000000000000000000, mmu_err_sts 000000000000000000\ndpc_err_sts 000000000000000000\n\nMailbox (0): (0)\n Inbox AKF_KIC_INBOX_CTRL = 0x00020001, AKF_KIC_MAILBOX_SET = 0x11111101\n Outbox AKF_AP_OUTBOX_CTRL = 0x00020001, AKF_AP_MAILBOX_SET = 0x00000000\n\n dir endpoint timestamp msg\n ==== ============ ================== ==================\n [RX] user01 0x00000005e0012a94 0x544730420000c013\n [TX] user01 0x00000005e001303c 0x000000000000c000\n [RX] user01 0x00000005e00154a0 0x544730420008d010\n [TX] user01 0x00000005e0017ff0 0x000000000008d000\n [RX] user01 0x00000005e00191fc 0x423053530000e013\n [TX] user01 0x00000005e001b160 0x000000000000e000\n [RX] user01 0x00000005e001bb1c 0x423053530008f010\n [TX] user01 0x00000005e001da7c 0x000000580002f000\n [RX] user01 0x00000005e001e478 0x4230525300000013\n [TX] user01 0x00000005e0020268 0x0000000000000000\n [RX] user01 0x00000005e00225a4 0x4230525300081010\n [TX] user01 0x00000005e00241e4 0x0000001500021000\n [RX] user01 0x00000005e00264c0 0x4230464700002013\n [TX] user01 0x00000005e0028110 0x0000000000002000\n [RX] user01 0x00000005e002a3f0 0x4230464700083010\n [TX] user01 0x00000005e002c0b8 0x0000000000083000\n [RX] user01 0x00000005e002d054 0x4230414300004013\n [TX] user01 0x00000005e002d500 0x0000000000004000\n [RX] user01 0x00000005e002e254 0x4230414300085010\n [TX] user01 0x00000005e002e828 0x0000fe6500025000\n [RX] user01 0x00000005e002fc84 0x4230495600006013\n [TX] user01 0x00000005e003194c 0x0000000000006000\n [RX] user01 0x00000005e00322c4 0x4230495600087010\n [TX] user01 0x00000005e0034224 0x0000fe6500027000\n [RX] user01 0x00000005e0034e54 0x4230434800008013\n [TX] user01 0x00000005e0036ac0 0x0000000000008000\n [RX] user01 0x00000005e00374a8 0x4230434800089010\n [TX] user01 0x00000005e0039358 0x000000ee00029000\n [RX] user01 0x00000005e003b670 0x544730560000a013\n [TX] user01 0x00000005e003cec8 0x000000000000a000\n [RX] user01 0x00000005e003dc20 0x544730560008b010\n [TX] user01 0x00000005e003e284 0x000000000008b000\nRTKit Task List:\n name | pri | stack use | status | resource | warning\n 0 rtk_ep_work | 057 | 640\/2048 | SEMWAIT | 0x4ac20 | \n 0x000000000001e324 0x000000000001f2cc 0x000000000002c32c 0x000000000001ee28\n\n 1 power | 000 | 832\/2048 | RUNNABLE | 0x40d80 | \n 0x000000000001e324 0x000000000002b134 0x000000000002ad6c 0x000000000001ee28\n\n 2 Misc | 019 | 1440\/4096 | SEMWAIT | 0x37cb0 | \n 0x000000000001e324 0x000000000001f2cc 0x000000000000dee0 0x000000000000f6f4 0x000000000001b4fc\n\n 3 InductiveTask | 019 | 1296\/2048 | RUNNABLE | 0 | \n 0x000000000001b268 0x0000000000020b54 0x0000000000006c20 0x000000000000c160 0x0000000000008e00 0x000000000001ee28\n\n 4 BMSTask | 019 | 1424\/2048 | RUNNABLE | 0 | [Faulting task]\n\n 5 PMUEventTask | 019 | 1040\/2048 | SEMWAIT | 0x462a0 | \n 0x000000000001e324 0x000000000001f2cc 0x0000000000003e20 0x000000000001ee28\n\n 6 APComms | 019 | 1296\/2048 | SEMWAIT | 0x45690 | \n 0x000000000001e324 0x000000000001f2cc 0x000000000002c32c 0x000000000001ee28\n\n\n\nSleep Count: 127406\nWake Count: 105409\nDuty Cycle: 28\nSleep Count: 127406\nWake Count: 105409\nDuty Cycle: 28\n\nRTBuddy(AP): Debug info:\n_iopStatus = 0x8\n_powerStateChangeLocked = false\nMailbox Status:\nIDLE_STATUS: 0x00000028\nMAILBOX_SET: 0x00000000\nMAILBOX_CLR: 0x00000000\nINBOX_CTRL: 0x00020001\nOUTBOX_CTRL: 0x00021101\nAP->IOP Mailbox
Previous usage scenarios:
Even with the original battery, I experienced similar issues with high restart frequency. It would restart automatically after being fully charged, and the battery level would still be around 20%. This 20% would last quite a while. I suspected it was a battery problem, so I replaced both the battery and cells. However, after replacement, screen responsiveness issues emerged. The screen didn't respond to touch, and upon inspection, it was identified as a motherboard problem. The motherboard was repaired, and the screen works fine now. However, the frequent restarting problem persists. Initially, a repair technician thought it could be related to the battery cells, so a new battery was installed, but the issue remained. The technician further examined it but couldn't pinpoint the exact cause, as there's no consistent pattern to the restart intervals.
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I would be interested to see the panic log you linked to, but the link doesn't work for me. You can upload the .txt doc right into your post, or copy-paste.
Alisha C 의