Just one more info... I have installed new kernel 2.6.17-10-386 With this new kernel now I can get dmesg erros with usb disk too.
Here is the log: [17179769.376000] usb 1-1: new full speed USB device using uhci_hcd and address 2 [17179769.604000] usb 1-1: configuration #1 chosen from 1 choice [17179770.700000] usbcore: registered new driver libusual [17179770.988000] SCSI subsystem initialized [17179771.068000] Initializing USB Mass Storage driver... [17179771.068000] scsi0 : SCSI emulation for USB Mass Storage devices [17179771.068000] usb-storage: device found at 2 [17179771.068000] usb-storage: waiting for device to settle before scanning [17179771.068000] usbcore: registered new driver usb-storage [17179771.068000] USB Mass Storage support registered. [17179776.068000] usb-storage: device scan complete [17179776.072000] Vendor: Model: USB DISK 28X Rev: PMAP [17179776.072000] Type: Direct-Access ANSI SCSI revision: 00 [17179776.724000] SCSI device sda: 2015232 512-byte hdwr sectors (1032 MB) [17179776.728000] sda: Write Protect is off [17179776.728000] sda: Mode Sense: 23 00 00 00 [17179776.728000] sda: assuming drive cache: write through [17179776.740000] SCSI device sda: 2015232 512-byte hdwr sectors (1032 MB) [17179776.744000] sda: Write Protect is off [17179776.744000] sda: Mode Sense: 23 00 00 00 [17179776.744000] sda: assuming drive cache: write through [17179776.744000] sda: sda1 [17179776.752000] sd 0:0:0:0: Attached scsi removable disk sda [17179776.812000] sd 0:0:0:0: Attached scsi generic sg0 type 0 [17179780.104000] FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! [17179810.448000] cpufreq: change failed with new_state 0 and result 0 [17179814.608000] cpufreq: change failed with new_state 1 and result 0 [17179819.184000] cpufreq: change failed with new_state 0 and result 0 [17179828.960000] cpufreq: change failed with new_state 1 and result 0 [17179846.644000] cpufreq: change failed with new_state 0 and result 0 [17179877.872000] cpufreq: change failed with new_state 1 and result 0 [17179953.444000] cpufreq: change failed with new_state 0 and result 0 [17179956.540000] cpufreq: change failed with new_state 1 and result 0 [17180037.896000] cpufreq: change failed with new_state 0 and result 0 [17180041.908000] cpufreq: change failed with new_state 1 and result 0 [17180084.632000] cpufreq: change failed with new_state 0 and result 0 [17180091.592000] cpufreq: change failed with new_state 1 and result 0 [17180108.316000] psmouse.c: Explorer Mouse at isa0060/serio1/input0 lost synchronization, throwing 2 bytes away. [17180108.316000] uhci_hcd 0000:00:07.2: host system error, PCI problems? [17180108.316000] uhci_hcd 0000:00:07.2: host controller halted, very bad! [17180108.316000] uhci_hcd 0000:00:07.2: HC died; cleaning up [17180108.316000] cpufreq: change failed with new_state 0 and result 0 [17180108.316000] usb 1-1: USB disconnect, address 2 [17180108.320000] sd 0:0:0:0: SCSI error: return code = 0x10000 [17180108.320000] end_request: I/O error, dev sda, sector 1738416 [17180108.320000] sd 0:0:0:0: rejecting I/O to device being removed [17180108.320000] sd 0:0:0:0: rejecting I/O to device being removed [17180108.320000] sd 0:0:0:0: rejecting I/O to device being removed [17180108.320000] sd 0:0:0:0: rejecting I/O to device being removed [17180108.320000] Buffer I/O error on device sda1, logical block 1353360 [17180108.320000] lost page write due to I/O error on sda1 [17180108.320000] sd 0:0:0:0: SCSI error: return code = 0x10000 [17180108.320000] end_request: I/O error, dev sda, sector 1738448 [17180108.320000] sd 0:0:0:0: rejecting I/O to device being removed [17180108.524000] 0:0:0:0: rejecting I/O to dead device [17180112.264000] cpufreq: change failed with new_state 1 and result 0 [17180140.472000] 0:0:0:0: rejecting I/O to dead device [17180140.472000] FAT: unable to read inode block for updating (i_pos 21653767) [17180169.600000] psmouse.c: Explorer Mouse at isa0060/serio1/input0 lost synchronization, throwing 1 bytes away. [17180169.600000] cpufreq: change failed with new_state 0 and result 0 [17180172.548000] cpufreq: change failed with new_state 1 and result 0 [17180236.948000] cpufreq: change failed with new_state 0 and result 0 [17180238.876000] cpufreq: change failed with new_state 1 and result 0 [17180245.800000] cpufreq: change failed with new_state 0 and result 0 [17180255.628000] cpufreq: change failed with new_state 1 and result 0 [17180283.748000] cpufreq: change failed with new_state 0 and result 0 [17180287.172000] cpufreq: change failed with new_state 1 and result 0 [17180296.724000] cpufreq: change failed with new_state 0 and result 0 [17180299.668000] cpufreq: change failed with new_state 1 and result 0 I was copying 90M when a pop up informed me that unsafe umount of usb disk could damages files... but I diden't any umount disk. It seems that for some reason the kernel by it self umount USB device. -- Edgy crashes when USB are plugged on my DELL C600 https://launchpad.net/bugs/76964 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs