12.04 fresh install fails mounting USB drives

[save2]

Hi
I have a problem when connecting USB external drive to my fresh install of 32 bit 12.04 Ubuntu:
the scsi_eh process crash: task scsi_eh_8:6332 blocked for more than 120 seconds.

from system log:

Apr 18 02:26:50 adesktop kernel: [62161.869610] usb 2-2: new full-speed USB device number 2 using ohci_hcd
Apr 18 02:26:51 adesktop kernel: [62163.274251] usb 2-2: Parent hub missing LPM exit latency info.  Power management will be impacted.
Apr 18 02:26:51 adesktop kernel: [62163.292235] usb 2-2: New USB device found, idVendor=1058, idProduct=0730
Apr 18 02:26:51 adesktop kernel: [62163.292242] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Apr 18 02:26:51 adesktop kernel: [62163.292249] usb 2-2: Product: My Passport 0730
Apr 18 02:26:51 adesktop kernel: [62163.292254] usb 2-2: Manufacturer: Western Digital
Apr 18 02:26:51 adesktop kernel: [62163.292259] usb 2-2: SerialNumber: 575846314136315539393739
Apr 18 02:26:51 adesktop kernel: [62163.326655] Initializing USB Mass Storage driver...
Apr 18 02:26:51 adesktop kernel: [62163.326982] scsi8 : usb-storage 2-2:1.0
Apr 18 02:26:51 adesktop kernel: [62163.327148] usbcore: registered new interface driver usb-storage
Apr 18 02:26:51 adesktop kernel: [62163.327151] USB Mass Storage support registered.
Apr 18 02:26:53 adesktop kernel: [62165.362260] scsi 8:0:0:0: Direct-Access     WD       My Passport 0730 1016 PQ: 0 ANSI: 6
Apr 18 02:26:53 adesktop kernel: [62165.369232] scsi 8:0:0:1: Enclosure         WD       SES Device       1016 PQ: 0 ANSI: 6
Apr 18 02:26:53 adesktop kernel: [62165.370784] sd 8:0:0:0: Attached scsi generic sg2 type 0
Apr 18 02:26:53 adesktop kernel: [62165.371088] scsi 8:0:0:1: Attached scsi generic sg3 type 13
Apr 18 02:26:55 adesktop kernel: [62166.953687] sd 8:0:0:0: [sdb] 976707584 512-byte logical blocks: (500 GB/465 GiB)
Apr 18 02:27:54 adesktop udevd[646]: timeout: killing '/sbin/modprobe -bv scsi:t-0x0d' [6340]
Apr 18 02:28:25  udevd[646]: last message repeated 31 times
Apr 18 02:29:07  udevd[646]: last message repeated 41 times
Apr 18 02:29:07 adesktop AptDaemon: INFO: Quitting due to inactivity
Apr 18 02:29:07 adesktop AptDaemon: INFO: Quitting was requested
Apr 18 02:29:07 adesktop udevd[646]: timeout: killing '/sbin/modprobe -bv scsi:t-0x0d' [6340]
Apr 18 02:29:47  udevd[646]: last message repeated 40 times
Apr 18 02:29:47 adesktop kernel: [62339.539997] INFO: task scsi_eh_8:6332 blocked for more than 120 seconds.
Apr 18 02:29:47 adesktop kernel: [62339.540003] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 18 02:29:47 adesktop kernel: [62339.540008] scsi_eh_8       D 00000000     0  6332      2 0x00000000
Apr 18 02:29:47 adesktop kernel: [62339.540016]  eed4fe54 00000046 00000000 00000000 00000000 f6c9f230 c198de00 c198de00
Apr 18 02:29:47 adesktop kernel: [62339.540033]  71d0f827 00003891 f7bc8e00 ef01a610 f6c9f230 eed4fe34 eed4fe7c eed4fe88
Apr 18 02:29:47 adesktop kernel: [62339.540045]  c107eeae eed4fe34 00000000 00000000 eed4fecc eed4fe54 eed4fe9c 00001a97
Apr 18 02:29:47 adesktop kernel: [62339.540060] Call Trace:
Apr 18 02:29:47 adesktop kernel: [62339.540075]  [<c107eeae>] ? find_busiest_group+0x2e/0x380
Apr 18 02:29:47 adesktop kernel: [62339.540085]  [<c15df893>] schedule+0x23/0x60
Apr 18 02:29:47 adesktop kernel: [62339.540094]  [<c15de31d>] schedule_timeout+0x22d/0x2a0
Apr 18 02:29:47 adesktop kernel: [62339.540101]  [<c107f278>] ? load_balance+0x78/0x370
Apr 18 02:29:47 adesktop kernel: [62339.540107]  [<c15df727>] wait_for_common+0xa7/0x110
Apr 18 02:29:47 adesktop kernel: [62339.540114]  [<c1078390>] ? try_to_wake_up+0x190/0x190
Apr 18 02:29:47 adesktop kernel: [62339.540119]  [<c15df867>] wait_for_completion+0x17/0x20
Apr 18 02:29:47 adesktop kernel: [62339.540130]  [<fa452abb>] command_abort+0x7b/0xa0 [usb_storage]
Apr 18 02:29:47 adesktop kernel: [62339.540137]  [<c13e3e7c>] scsi_eh_abort_cmds+0x4c/0x190
Apr 18 02:29:47 adesktop kernel: [62339.540144]  [<c13e5112>] scsi_unjam_host+0x92/0x1a0
Apr 18 02:29:47 adesktop kernel: [62339.540150]  [<c1038db8>] ? default_spin_lock_flags+0x8/0x10
Apr 18 02:29:47 adesktop kernel: [62339.540157]  [<c15e071d>] ? _raw_spin_lock_irqsave+0x2d/0x40
Apr 18 02:29:47 adesktop kernel: [62339.540163]  [<c13bf814>] ? __pm_runtime_resume+0x54/0x80
Apr 18 02:29:47 adesktop kernel: [62339.540169]  [<c13e5375>] scsi_error_handler+0x155/0x1b0
Apr 18 02:29:47 adesktop kernel: [62339.540179]  [<c1070a2e>] ? complete+0x4e/0x60
Apr 18 02:29:47 adesktop kernel: [62339.540186]  [<c13e5220>] ? scsi_unjam_host+0x1a0/0x1a0
Apr 18 02:29:47 adesktop kernel: [62339.540196]  [<c1066b02>] kthread+0x72/0x80
Apr 18 02:29:47 adesktop kernel: [62339.540202]  [<c1066a90>] ? flush_kthread_worker+0x90/0x90
Apr 18 02:29:47 adesktop kernel: [62339.540211]  [<c15e7ebe>] kernel_thread_helper+0x6/0x10
Apr 18 02:29:47 adesktop kernel: [62339.540216] INFO: task modprobe:6340 blocked for more than 120 seconds.
Apr 18 02:29:47 adesktop kernel: [62339.540219] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 18 02:29:47 adesktop kernel: [62339.540222] modprobe        D ef179f10     0  6340    646 0x00000004
Apr 18 02:29:47 adesktop kernel: [62339.540235]  ef179f38 00000082 eddbc60c ef179f10 c12d1040 c1861240 c198de00 c198de00
Apr 18 02:29:47 adesktop kernel: [62339.540250]  020cda40 0000388a f7b9ee00 f2bad8d0 c1861240 f64f0a80 c180a999 f6d88200
Apr 18 02:29:47 adesktop kernel: [62339.540265]  f6c008a0 c12dbe33 ef179f0c c15de638 00000000 f84df120 ef179f14 c1038db8
Apr 18 02:29:47 adesktop kernel: [62339.540277] Call Trace:
Apr 18 02:29:47 adesktop kernel: [62339.540284]  [<c12d1040>] ? kobject_uevent_env+0xf0/0x450
Apr 18 02:29:47 adesktop kernel: [62339.540291]  [<c12dbe33>] ? kvasprintf+0x43/0x60
Apr 18 02:29:47 adesktop kernel: [62339.540296]  [<c15de638>] ? mutex_lock+0x18/0x40
Apr 18 02:29:47 adesktop kernel: [62339.540304]  [<c1038db8>] ? default_spin_lock_flags+0x8/0x10
Apr 18 02:29:47 adesktop kernel: [62339.540312]  [<c15e071d>] ? _raw_spin_lock_irqsave+0x2d/0x40
Apr 18 02:29:47 adesktop kernel: [62339.540322]  [<c15df893>] schedule+0x23/0x60
Apr 18 02:29:47 adesktop kernel: [62339.540329]  [<c106dff5>] async_synchronize_cookie_domain+0xb5/0x130
Apr 18 02:29:47 adesktop kernel: [62339.540335]  [<c10671a0>] ? add_wait_queue+0x50/0x50
Apr 18 02:29:47 adesktop kernel: [62339.540341]  [<c106e0ca>] async_synchronize_full+0x1a/0x20
Apr 18 02:29:47 adesktop kernel: [62339.540348]  [<c10a56d9>] sys_init_module+0xd9/0x200
Apr 18 02:29:47 adesktop kernel: [62339.540355]  [<c15e791f>] sysenter_do_call+0x12/0x28
Apr 18 02:29:48 adesktop udevd[646]: timeout: killing '/sbin/modprobe -bv scsi:t-0x0d' [6340]

if it helps
$ lsusb
Bus 001 Device 002: ID 046d:c326 Logitech, Inc.
Bus 001 Device 003: ID 04b3:310c IBM Corp. Wheel Mouse
Bus 002 Device 002: ID 1058:0730 Western Digital Technologies, Inc.
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

$ lspci
00:00.0 RAM memory: NVIDIA Corporation MCP78S [GeForce 8200] Memory Controller (rev a2)
00:01.0 ISA bridge: NVIDIA Corporation MCP78S [GeForce 8200] LPC Bridge (rev a2)
00:01.1 SMBus: NVIDIA Corporation MCP78S [GeForce 8200] SMBus (rev a1)
00:01.2 RAM memory: NVIDIA Corporation MCP78S [GeForce 8200] Memory Controller (rev a1)
00:01.3 Co-processor: NVIDIA Corporation MCP78S [GeForce 8200] Co-Processor (rev a2)
00:01.4 RAM memory: NVIDIA Corporation MCP78S [GeForce 8200] Memory Controller (rev a1)
00:02.0 USB controller: NVIDIA Corporation MCP78S [GeForce 8200] OHCI USB 1.1 Controller (rev a1)
00:04.0 USB controller: NVIDIA Corporation MCP78S [GeForce 8200] OHCI USB 1.1 Controller (rev a1)
00:06.0 IDE interface: NVIDIA Corporation MCP78S [GeForce 8200] IDE (rev a1)
00:07.0 Audio device: NVIDIA Corporation MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio (rev a1)
00:08.0 PCI bridge: NVIDIA Corporation MCP78S [GeForce 8200] PCI Bridge (rev a1)
00:09.0 IDE interface: NVIDIA Corporation MCP78S [GeForce 8200] SATA Controller (non-AHCI mode) (rev a2)
00:0a.0 Ethernet controller: NVIDIA Corporation MCP77 Ethernet (rev a2)
00:10.0 PCI bridge: NVIDIA Corporation MCP78S [GeForce 8200] PCI Express Bridge (rev a1)
00:12.0 PCI bridge: NVIDIA Corporation MCP78S [GeForce 8200] PCI Express Bridge (rev a1)
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Link Control
02:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV770 [Radeon HD 4850]
02:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI RV770 HDMI Audio [Radeon HD 4850/4870]

I was able to connect this drive to a different ubuntu (12.04) with no problems.
so i guess it is some kind of hardware issue or setup issue.

Furthermore, same machine, dual boot Win7 : I can read the USB drives with no issues.
comment: its not for booting a USB drive, just wanted to do the usual backup...

any idea where to start looking ?

[save2]

SOLVED !

it seems to be a well known problem with Asus motherboards of the M3N78 family.
Not that it is a hardware problem since the same motherboard can work very well in Ubuntu 10.04 or Windows7.
Something bad happened in the later kernels of 11.04+

I simply bought a 20$ USB PCIe card and everything start working as expected.
I bought a card with Nec chipset since this chipset is widely automatically supported by most kernels out there.
for example: http://www.newegg.com/Product/Produc...82E16815283031