Early logs of the problem indicated that the kernel would not allocate enough power to deal with the new demands of the high speed USB, which might explain why it works in host mode (because the kernel didn't get a chance to limit the amount of power allocated), as well as on Windows, but not in Ubuntu. I've read about this problem with multiple distributions and kernels, and on occasion I read that it had been patched. I think there is a problem with the ehci / high speed USB 3.0 modules in the kernel. Other USB's don't work, this is a problem with the system not the USB. The USB DOES NOT work in guest mode but WORKS in live session mode. ├─sda4 8:4 0 32G 0 part /media/kagz/New Volume Requested command output: sudo lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
#SANDISK CRUZER DRIVER WINDOWS 8.1 WINDOWS 7#
The funny thing is that Windows 7 detects it and uses it fine but it's not detected in Ubuntu except by the lsusb command. I backed up my data in another laptop, formatted the drive in Windows 7 but still it's not recognized. I don't know what to do anymore to get it detected and I don't want to format it as it contains important data. Sep 10 22:28:25 xhakz mtp-probe: bus: 2, device: 7 was not an MTP device Sep 10 22:28:25 xhakz kernel: usb 2-2: Manufacturer: SanDisk Sep 10 22:28:25 xhakz kernel: usb 2-2: Product: Cruzer Facet Sep 10 22:28:25 xhakz kernel: usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Sep 10 22:28:25 xhakz kernel: usb 2-2: New USB device found, idVendor=0781, idProduct=5576 Sep 10 22:28:25 xhakz kernel: usb 2-2: new high-speed USB device number 7 using ehci-pci Tail -f /var/log/syslog Sep 10 22:28:22 xhakz kernel: usb 2-2: USB disconnect, device number 4 E220 HSDPA Modem / E230/E270/E870 HSDPA/HSUPA Modemīus 002 Device 004: ID 0781:5576 SanDisk Corp.īus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubīus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hubīus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hubīus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hubīus 005 Device 002: ID 1a2c:0021 China Resource Semico Co., Ltd Keyboardīus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hubīus 001 Device 002: ID 04f2:b070 Chicony Electronics Co., Ltdīus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubīus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hubīus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Here's some terminal output: lsusb Bus 002 Device 006: ID 12d1:1003 Huawei Technologies Co., Ltd. Lsusb detects it but sudo fdisk -l or blkid doesn't. I have a SanDisk 16GB USB drive that is not being detected by Ubuntu 14.04 but is detected by Windows 7.
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