Comment 2 for bug 1725163

Tried unplugging camera, problems are gone. Cheese is starting instantly (with camera plugged in 33 seconds), shutdown/logout are instant (with camera 25- 30 sec, didn't measure exact time).
Camera make and model: Logitech c525

lsusb:
Bus 003 Device 009: ID 046d:0826 Logitech, Inc. HD Webcam C525
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 239 Miscellaneous Device
  bDeviceSubClass 2 ?
  bDeviceProtocol 1 Interface Association
  bMaxPacketSize0 64
  idVendor 0x046d Logitech, Inc.
  idProduct 0x0826 HD Webcam C525
  bcdDevice 0.10
  iManufacturer 0
  iProduct 2 HD Webcam C525
  iSerial 1 AF850BA0
  bNumConfigurations 1