I'm trying to mount a USB-drive. However, it seems that my Linux (Debian) doesn't recognise it at all (and any other usb-drive), though it powers it. The usb-hubs are OK, because I was able to boot from that USB and install a new Linux, however neither my old distribution (I had Ubuntu), nor the new one can recognise the usb.
lsusb shows all hubs are empty:
:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
dmesg doesn't react on pluging the usb:
:~$ dmesg | grep -i usb [ 1.416188] usbcore: registered new interface driver usbfs [ 1.416243] usbcore: registered new interface driver hub [ 1.417839] usbcore: registered new device driver usb [ 1.418686] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 1.418831] ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 1 [ 1.446915] ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00 [ 1.447006] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 [ 1.447013] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.447019] usb usb1: Product: EHCI Host Controller [ 1.447024] usb usb1: Manufacturer: Linux 3.2.0-4-686-pae ehci_hcd [ 1.447028] usb usb1: SerialNumber: 0000:00:1d.7 [ 1.447302] hub 1-0:1.0: USB hub found [ 1.448779] uhci_hcd: USB Universal Host Controller Interface driver [ 1.448910] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2 [ 1.449044] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001 [ 1.449050] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.449055] usb usb2: Product: UHCI Host Controller [ 1.449060] usb usb2: Manufacturer: Linux 3.2.0-4-686-pae uhci_hcd [ 1.449065] usb usb2: SerialNumber: 0000:00:1d.0 [ 1.449857] hub 2-0:1.0: USB hub found ... and three more UHCI
What can be the problem?
I found one more strange feature. As I described, the USB is recognised by BIOS/UEFI. If my preferred booting device is hard disk and a bootable USB was plugged in during booting, then it is seen in OS!