a couple weeks ago i noticed higher than expected cpu utilization while my phone was idle and battery draining faster than expected. curious, i discovered thousands of system messages per second were being logged by ios on my iphone (see uploaded file).
it appears that the apple news app is causing these messages. i tried resetting the iphone, restoring from backup, disabling icloud sync, but nothing fixed it. thousands of messages would flood the system log every second until i rebooted the phone.
force quitting the news app did not stop these log messages. only restarting the phone would return things to normal, for a while at least. these log messages would return randomly without my opening the news app; most likely due to a background icloud sync process.
you can see in the log file that the two processes causing problems are: nanonewscd and identityservicesd. i believe these are related to the apple news app and icloud respectively.
after various attempts to isolate this issue, my only solution was to delete the apple news app. upon deleting i have not seen these error messages return, and cpu usage is always low when phone is idle with no unusual battery drain.
maybe this issue is isolated to my iphone/icloud only. but if you use the apple news app and notice your iphone feeling warm or see excessive battery drain while idle, check your phone's idle cpu usage. if it's high, check the ios system log and look for repeating error messages related to icloud.
i reported this bug to apple, but have not heard back from them (it's been a few weeks).
it appears that the apple news app is causing these messages. i tried resetting the iphone, restoring from backup, disabling icloud sync, but nothing fixed it. thousands of messages would flood the system log every second until i rebooted the phone.
force quitting the news app did not stop these log messages. only restarting the phone would return things to normal, for a while at least. these log messages would return randomly without my opening the news app; most likely due to a background icloud sync process.
you can see in the log file that the two processes causing problems are: nanonewscd and identityservicesd. i believe these are related to the apple news app and icloud respectively.
after various attempts to isolate this issue, my only solution was to delete the apple news app. upon deleting i have not seen these error messages return, and cpu usage is always low when phone is idle with no unusual battery drain.
maybe this issue is isolated to my iphone/icloud only. but if you use the apple news app and notice your iphone feeling warm or see excessive battery drain while idle, check your phone's idle cpu usage. if it's high, check the ios system log and look for repeating error messages related to icloud.
i reported this bug to apple, but have not heard back from them (it's been a few weeks).