```
workqueue pm: flags=0x4
  pwq 22: cpus=11 node=0 flags=0x0 nice=0 active=0/0 refcnt=2
    inactive: pm_runtime_work
workqueue usb_hub_wq: flags=0x4
  pwq 10: cpus=5 node=0 flags=0x0 nice=0 active=2/0 refcnt=3
    in-flight: 130418:hub_event hub_event
pool 10: cpus=5 node=0 flags=0x0 nice=0 hung=15s workers=4 idle: 179425 180465 146381
```

At least it looks like it's usb?