Comment 73 for bug 792085

I am having this bug on Xubuntu 14.10 (Thunar 1.6.3) when trying to unmount a USB 3.0 Seagate 1TB HDD from a USB 3.0 port. I also experience one second off and remounting after that.
I don't have this bug when using USB 2.0 pendrive in USB 3.0 port.

dmesg | grep USB

#after plugged in a USB 2.0 port
[ 1955.357740] usb 1-1.2: new high-speed USB device number 8 using ehci-pci
[ 1955.512198] usb 1-1.2: New USB device found, idVendor=0bc2, idProduct=a013
[ 1955.512205] usb 1-1.2: New USB device strings: Mfr=2, Product=3, SerialNumber=1

#unmounting with Thunar, the device starts spinning again but cannot be seen in /dev/sd*
[ 2109.543249] usb 1-1.2: USB disconnect, device number 8

#after plugged in a USB 3.0 port
[ 2335.126791] usb 4-4: new SuperSpeed USB device number 12 using xhci_hcd
[ 2335.143475] usb 4-4: New USB device found, idVendor=0bc2, idProduct=a013
[ 2335.143482] usb 4-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1

#unmounting with Thunar, the device starts spinning again and Thunar opens the remounted media
[ 2439.351726] usb 4-4: USB disconnect, device number 12
[ 2439.739404] usb 4-4: new SuperSpeed USB device number 13 using xhci_hcd
[ 2439.756138] usb 4-4: New USB device found, idVendor=0bc2, idProduct=a013
[ 2439.756146] usb 4-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1

USB 2.0 pendrive
#automount in USB 3.0 port
[ 3045.472256] usb 3-4: new high-speed USB device number 3 using xhci_hcd
[ 3045.601106] usb 3-4: New USB device found, idVendor=08ec, idProduct=2038
[ 3045.601115] usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3045.601698] usb-storage 3-4:1.0: USB Mass Storage device detected
#/dev contents
ata@ata-HP-ProBook-6470b:~$ ls /dev/sdb*
/dev/sdb /dev/sdb1

#Thunar gives this error message when unmounting: "Error opening /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/remove: No such file or directory."
#Nothing new in dmesg
#/dev contents
ata@ata-HP-ProBook-6470b:~$ ls /dev/sdb*
/dev/sdb