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Droid Mini/Android 4.4.4 unusually high CPU usage

Over the last two weeks, my Droid Mini (Android 4.4.4) has been running with unusually high CPU usage. Usage is often in the 90-100% range, making the device unusable and draining the battery. I installed the Cool Tools app and am actively monitoring -- when the CPU spikes, the process with the highest usage is always "irq/350-wcd9xxx".  After a factory reset, the problem persists.  Has anyone else experienced this or do you know what activity/service "irq/350-wcd9xxx" relates to?

Re: Droid Mini/Android 4.4.4 unusually high CPU usage

I have the exact same problem. Did you ever get an answer to this?

My research seems to indicate that irq/350-wcd9xxx has something to do with the headset, perhaps headset detection?

I am thinking maybe a short in the 2.5mm headphone jack?