It starts consuming 100% CPU after this:

02341452 hotplug_libudev.c:642:HPEstablishUSBNotifications() USB Device removed
00000217 hotplug_libudev.c:619:HPEstablishUSBNotifications()
00000068 hotplug_libudev.c:642:HPEstablishUSBNotifications() USB Device removed
00000149 hotplug_libudev.c:619:HPEstablishUSBNotifications()
00002713 hotplug_libudev.c:642:HPEstablishUSBNotifications() USB Device removed
00000152 hotplug_libudev.c:619:HPEstablishUSBNotifications()
00020583 hotplug_libudev.c:642:HPEstablishUSBNotifications() USB Device removed
00000143 hotplug_libudev.c:619:HPEstablishUSBNotifications()
02634822 ifdhandler.c:1143:IFDHPowerICC() action: PowerDown, 
usb:1050/0115:libudev:1:/dev/bus/usb/003/002 (lun: 0)
00000091 eventhandler.c:479:EHStatusHandlerThread() powerState: 
POWER_STATE_UNPOWERED

or this:

05000574 ifdhandler.c:1143:IFDHPowerICC() action: PowerDown, 
usb:1050/0115:libudev:1:/dev/bus/usb/003/002 (lun: 0)
00000261 eventhandler.c:479:EHStatusHandlerThread() powerState: 
POWER_STATE_UNPOWERED
06904552 hotplug_libudev.c:648:HPEstablishUSBNotifications() USB Device add
00000242 hotplug_libudev.c:294:get_driver() Looking for a driver for VID: 
0x046D, PID: 0x0825, path: /dev/bus/usb/003/007
00000015 hotplug_libudev.c:414:HPAddDevice() /dev/bus/usb/003/007 is not a 
supported smart card reader
00000017 hotplug_libudev.c:619:HPEstablishUSBNotifications()
00022668 hotplug_libudev.c:648:HPEstablishUSBNotifications() USB Device add
00000214 hotplug_libudev.c:294:get_driver() Looking for a driver for VID: 
0x046D, PID: 0x0825, path: /dev/bus/usb/003/007
00000013 hotplug_libudev.c:414:HPAddDevice() /dev/bus/usb/003/007 is not a 
supported smart card reader
00000017 hotplug_libudev.c:619:HPEstablishUSBNotifications()
00006048 hotplug_libudev.c:648:HPEstablishUSBNotifications() USB Device add
00000207 hotplug_libudev.c:294:get_driver() Looking for a driver for VID: 
0x046D, PID: 0x0825, path: /dev/bus/usb/003/007
00000014 hotplug_libudev.c:414:HPAddDevice() /dev/bus/usb/003/007 is not a 
supported smart card reader
00000015 hotplug_libudev.c:619:HPEstablishUSBNotifications()
00014614 hotplug_libudev.c:648:HPEstablishUSBNotifications() USB Device add
00000200 hotplug_libudev.c:294:get_driver() Looking for a driver for VID: 
0x046D, PID: 0x0825, path: /dev/bus/usb/003/007
00000016 hotplug_libudev.c:414:HPAddDevice() /dev/bus/usb/003/007 is not a 
supported smart card reader
00000014 hotplug_libudev.c:619:HPEstablishUSBNotifications()

Basically, if I plug or unplug a USB device, pcscd immediately starting
using 100% CPU.

Let me know if there is anything else I can send you to help you debug.

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https://bugs.launchpad.net/bugs/1551897

Title:
  Excessive CPU utilization

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