Comment 3 for bug 1215155

This seems to be happening with generic USB thumbdrives, too. (This one's unmarked promotional USB thumbdrive, but confirmed this happening on two of the identical model.)

The below is kern.log of the relevant section.

Aug 21 15:14:24 madoka kernel: [ 936.616305] usb 2-1: USB disconnect, device number 2
Aug 21 15:14:28 madoka kernel: [ 940.471598] usb 2-2: new high-speed USB device number 3 using ehci-pci
Aug 21 15:14:28 madoka kernel: [ 940.605182] usb 2-2: New USB device found, idVendor=cd12, idProduct=ef18
Aug 21 15:14:28 madoka kernel: [ 940.605195] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 21 15:14:28 madoka kernel: [ 940.605203] usb 2-2: Product: DISK
Aug 21 15:14:28 madoka kernel: [ 940.605209] usb 2-2: Manufacturer: USB 2.0
Aug 21 15:14:28 madoka kernel: [ 940.605214] usb 2-2: SerialNumber: 4066037FC2C31922
Aug 21 15:14:28 madoka kernel: [ 940.606551] scsi3 : usb-storage 2-2:1.0
Aug 21 15:14:29 madoka kernel: [ 941.603475] scsi 3:0:0:0: Direct-Access USB 2.0 DISK 1.00 PQ: 0 ANSI: 2
Aug 21 15:14:29 madoka kernel: [ 941.606238] sd 3:0:0:0: Attached scsi generic sg2 type 0
Aug 21 15:14:29 madoka kernel: [ 941.609269] sd 3:0:0:0: [sdb] 4075520 512-byte logical blocks: (2.08 GB/1.94 GiB)
Aug 21 15:14:29 madoka kernel: [ 941.609883] sd 3:0:0:0: [sdb] Write Protect is off
Aug 21 15:14:29 madoka kernel: [ 941.609909] sd 3:0:0:0: [sdb] Mode Sense: 0b 00 00 08
Aug 21 15:14:29 madoka kernel: [ 941.611164] sd 3:0:0:0: [sdb] No Caching mode page present
Aug 21 15:14:29 madoka kernel: [ 941.611173] sd 3:0:0:0: [sdb] Assuming drive cache: write through
Aug 21 15:15:00 madoka kernel: [ 972.327875] usb 2-2: reset high-speed USB device number 3 using ehci-pci
Aug 21 15:15:31 madoka kernel: [ 1003.344758] usb 2-2: reset high-speed USB device number 3 using ehci-pci
Aug 21 15:16:02 madoka kernel: [ 1034.297549] usb 2-2: reset high-speed USB device number 3 using ehci-pci
Aug 21 15:16:33 madoka kernel: [ 1065.250606] usb 2-2: reset high-speed USB device number 3 using ehci-pci
Aug 21 15:16:33 madoka kernel: [ 1065.390248] sd 3:0:0:0: [sdb] No Caching mode page present
Aug 21 15:16:33 madoka kernel: [ 1065.390263] sd 3:0:0:0: [sdb] Assuming drive cache: write through