Description of problem:
My mp4 can work with Fedora 12,13,14,but can't work with Fedora 15

Version-Release number of selected component (if applicable):
kernel-2.6.38.6-27.fc15.x86_64

How reproducible:
always

Steps to Reproduce:
1.use usb connect my mp4 with the computer
2.
3.
  
Actual results:
not results

Expected results:
found /dev/sdb and /media/... ,and nautilus will automatic open the folder of my mp4

Additional info:
dmesg:
[44869.514074] usb 2-3: new high speed USB device using ehci_hcd and address 5
[44869.629605] usb 2-3: New USB device found, idVendor=071b, idProduct=3203
[44869.629612] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[44869.629617] usb 2-3: Product: ROCK MP3
[44869.629621] usb 2-3: Manufacturer: RockChip
[44869.629624] usb 2-3: SerialNumber: USBV1.00
[44869.630303] usb-storage 2-3:1.0: Quirks match for vid 071b pid 3203: 80600
[44869.630362] scsi7 : usb-storage 2-3:1.0
[44870.630673] scsi 7:0:0:0: Direct-Access     OPPO S19 USBDISK  User    1.00 PQ: 0 ANSI: 0
[44870.633635] sd 7:0:0:0: Attached scsi generic sg2 type 0
[44870.634057] sd 7:0:0:0: [sdb] 7921664 512-byte logical blocks: (4.05 GB/3.77 GiB)
[44870.634063] sd 7:0:0:0: [sdb] Assuming Write Enabled
[44870.737151] usb 2-3: reset high speed USB device using ehci_hcd and address 5
[44870.905419] usb 2-3: USB disconnect, address 5
[44870.905546] sd 7:0:0:0: [sdb] No Caching mode page present
[44870.905551] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[44870.905872] sd 7:0:0:0: [sdb] READ CAPACITY failed
[44870.905877] sd 7:0:0:0: [sdb]  Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[44870.905883] sd 7:0:0:0: [sdb] Sense not available.
[44870.905888] sd 7:0:0:0: [sdb] Assuming Write Enabled
[44870.905934] sd 7:0:0:0: [sdb] No Caching mode page present
[44870.905938] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[44870.905944] sdb: detected capacity change from 4055891968 to 0
[44870.906323] sd 7:0:0:0: [sdb] Attached SCSI removable disk