usb automount does not work

part of dmesg log:

[ 74.610139] usb 1-2: new high speed USB device using ehci_hcd and address 2
[ 74.786046] Initializing USB Mass Storage driver...
[ 74.786149] usb-storage 1-2:1.0: Quirks match for vid 05e3 pid 0702: 520
[ 74.786172] scsi6 : usb-storage 1-2:1.0
[ 74.786440] usbcore: registered new interface driver usb-storage
[ 74.786442] USB Mass Storage support registered.
[ 97.160149] usb 1-2: USB disconnect, address 2
[ 97.160160] scsi 6:0:0:0: Device offlined - not ready after error recovery
[ 727.840040] usb 2-4: new high speed USB device using ehci_hcd and address 3
[ 727.993349] usb-storage 2-4:1.0: Quirks match for vid 05e3 pid 0702: 520
[ 727.993385] scsi7 : usb-storage 2-4:1.0
[ 750.200132] usb 2-4: USB disconnect, address 3
[ 750.200141] scsi 7:0:0:0: Device offlined - not ready after error recovery
[ 1289.991314] usb 2-4: new high speed USB device using ehci_hcd and address 4
[ 1290.143400] usb-storage 2-4:1.0: Quirks match for vid 05e3 pid 0702: 520
[ 1290.143430] scsi8 : usb-storage 2-4:1.0
[ 1312.200048] usb 2-4: USB disconnect, address 4
[ 1312.200057] scsi 8:0:0:0: Device offlined - not ready after error recovery
[ 1427.695541] lo: Disabled Privacy Extensions

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-23-generic 2.6.35-23.41
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-23.41-generic 2.6.35.7
Uname: Linux 2.6.35-23-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: italo 1819 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf9100000 irq 46'
   Mixer name : 'Realtek ALC889A'
   Components : 'HDA:10ec0885,1458a002,00100101'
   Controls : 41
   Simple ctrls : 23
Date: Tue Dec 21 12:31:12 2010
HibernationDevice: RESUME=UUID=d8ebbd2f-b0f8-48a1-aa1d-2103be498484
HotplugNewDevices:

HotplugNewMounts:

InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. P35-DS3
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-23-generic root=UUID=06694df7-03d4-4753-8176-53dee4c2eb5d ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
RfKill:

SourcePackage: linux
Symptom: storage
UdevMonitorLog:
 monitor will print the received events for:
 UDEV - the event which udev sends out after rule processing
UdisksMonitorLog: Monitoring activity from the disks daemon. Press Ctrl+C to cancel.
dmi.bios.date: 09/06/2007
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F6
dmi.board.name: P35-DS3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF6:bd09/06/2007:svnGigabyteTechnologyCo.,Ltd.:pnP35-DS3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP35-DS3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: P35-DS3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.