디지털 카메라 드라이브를 안전하게 제거한 후 USB를 통해 어떻게 접근하나요?

Ubuntu 11.04에서 나는 현명하지 않게 마우스 오른쪽 버튼을 클릭하고 "USB를 통해 연결된 Sony HDR-XR150의 드라이브를 안전하게 마운트 해제했습니다." 이제 USB를 통해 디지털 카메라를 컴퓨터에 연결하면 Ubuntu가 새 드라이브를 등록하지 않거나 "USB 드라이브 사용 방법 인식 및 선택" 화면이 잠시 깜박입니다.

도와주세요.

참고로 dmesg제가 실행한 결과는 다음과 같습니다.

    scsi 4:0:0:0: Direct-Access     Sony     Camcorder        1.00 PQ: 0 ANSI: 0
[   53.099590] sd 4:0:0:0: Attached scsi generic sg2 type 0
[   53.101210] sd 4:0:0:0: [sdb] 234413857 512-byte logical blocks: (120 GB/111 GiB)
[   53.102473] sd 4:0:0:0: [sdb] Write Protect is off
[   53.102477] sd 4:0:0:0: [sdb] Mode Sense: 03 00 00 00
[   53.103471] sd 4:0:0:0: [sdb] No Caching mode page present
[   53.103474] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[   53.107097] sd 4:0:0:0: [sdb] No Caching mode page present
[   53.107101] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[   53.452787]  sdb: sdb1
[   53.455391] sd 4:0:0:0: [sdb] No Caching mode page present
[   53.455393] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[   53.455395] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[   55.341231] usb 2-1: USB disconnect, address 5
[   55.590219] hub 2-0:1.0: unable to enumerate USB device on port 1
[   55.870017] usb 2-1: new high speed USB device using ehci_hcd and address 7
[   56.021458] scsi5 : usb-storage 2-1:1.0
[   56.186651] usb 2-1: USB disconnect, address 7
[   56.500014] usb 2-1: new high speed USB device using ehci_hcd and address 8
[   56.651324] scsi6 : usb-storage 2-1:1.0
[   58.604859] usb 2-1: USB disconnect, address 8
[   58.920011] usb 2-1: new high speed USB device using ehci_hcd and address 9
[   59.270009] usb 6-1: new full speed USB device using uhci_hcd and address 2
[   59.400008] usb 6-1: device descriptor read/64, error -71
[   59.640013] usb 6-1: device descriptor read/64, error -71
[   59.870008] usb 6-1: new full speed USB device using uhci_hcd and address 3
[   60.000008] usb 6-1: device descriptor read/64, error -71
[   60.240014] usb 6-1: device descriptor read/64, error -71
[   60.470014] usb 6-1: new full speed USB device using uhci_hcd and address 4
[   60.890007] usb 6-1: device not accepting address 4, error -71
[   61.010009] usb 6-1: new full speed USB device using uhci_hcd and address 5
[   61.430007] usb 6-1: device not accepting address 5, error -71
[   61.430016] hub 6-0:1.0: unable to enumerate USB device on port 1
[  180.320011] usb 6-1: new full speed USB device using uhci_hcd and address 6
[  180.450016] usb 6-1: device descriptor read/64, error -71
[  180.690012] usb 6-1: device descriptor read/64, error -71
[  180.920010] usb 6-1: new full speed USB device using uhci_hcd and address 7
[  181.050010] usb 6-1: device descriptor read/64, error -71
[  181.290035] usb 6-1: device descriptor read/64, error -71
[  181.520009] usb 6-1: new full speed USB device using uhci_hcd and address 8
[  181.940007] usb 6-1: device not accepting address 8, error -71
[  182.060015] usb 6-1: new full speed USB device using uhci_hcd and address 9
[  182.480008] usb 6-1: device not accepting address 9, error -71
[  182.480019] hub 6-0:1.0: unable to enumerate USB device on port 1
[  555.580012] usb 6-1: new full speed USB device using uhci_hcd and address 10
[  555.710012] usb 6-1: device descriptor read/64, error -71
[  555.950010] usb 6-1: device descriptor read/64, error -71
[  556.180012] usb 6-1: new full speed USB device using uhci_hcd and address 11
[  556.310009] usb 6-1: device descriptor read/64, error -71
[  556.550009] usb 6-1: device descriptor read/64, error -71
[  556.780009] usb 6-1: new full speed USB device using uhci_hcd and address 12
[  557.200008] usb 6-1: device not accepting address 12, error -71
[  557.320012] usb 6-1: new full speed USB device using uhci_hcd and address 13
[  557.740006] usb 6-1: device not accepting address 13, error -71
[  557.740016] hub 6-0:1.0: unable to enumerate USB device on port 1