Comment 31 for bug 1172852

After upgrading to Saucy, I had the same issue:

Keyboard and mouse work in bios
Keyboard works in grub
Keyboard doesn't work in recovery mode nor do keyboard and mouse work in X

I installed linux-generic which in turn installed linux-image-extra-3.11.0-17-generic, and this fixed the issue - keyboard and mouse now work everywhere. I've can attach lspci and lsusb if these will be helpful

When booted normally, sshing in and tailing syslog showed the following on adding and removing usb keyboard and mouse

Mar 6 08:52:21 bluesun kernel: [ 356.478700] usb 3-11.3: USB disconnect, device number 12
Mar 6 08:52:22 bluesun kernel: [ 357.969978] usb 3-11.3: new low-speed USB device number 13 using xhci_hcd
Mar 6 08:52:22 bluesun mtp-probe: checking bus 3, device 13: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.3"
Mar 6 08:52:22 bluesun mtp-probe: bus: 3, device: 13 was not an MTP device
Mar 6 08:52:22 bluesun kernel: [ 357.990413] usb 3-11.3: New USB device found, idVendor=046d, idProduct=c05a
Mar 6 08:52:22 bluesun kernel: [ 357.990415] usb 3-11.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Mar 6 08:52:22 bluesun kernel: [ 357.990417] usb 3-11.3: Product: USB Optical Mouse
Mar 6 08:52:22 bluesun kernel: [ 357.990418] usb 3-11.3: Manufacturer: Logitech
Mar 6 08:52:22 bluesun kernel: [ 357.990501] usb 3-11.3: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes
...
Mar 6 09:25:49 bluesun kernel: [ 234.232047] usb 3-11.3: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes
Mar 6 09:25:49 bluesun mtp-probe: checking bus 3, device 8: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.3"
Mar 6 09:25:49 bluesun mtp-probe: bus: 3, device: 8 was not an MTP device
Mar 6 09:25:51 bluesun whoopsie[1612]: online
Mar 6 09:26:22 bluesun kernel: [ 267.320055] usb 3-4: USB disconnect, device number 2
Mar 6 09:26:38 bluesun kernel: [ 283.300820] usb 3-11.4: new low-speed USB device number 9 using xhci_hcd
Mar 6 09:26:38 bluesun kernel: [ 283.323223] usb 3-11.4: New USB device found, idVendor=046d, idProduct=c31c
Mar 6 09:26:38 bluesun kernel: [ 283.323231] usb 3-11.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Mar 6 09:26:38 bluesun kernel: [ 283.323236] usb 3-11.4: Product: USB Keyboard
Mar 6 09:26:38 bluesun kernel: [ 283.323240] usb 3-11.4: Manufacturer: Logitech
Mar 6 09:26:38 bluesun kernel: [ 283.323465] usb 3-11.4: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes
Mar 6 09:26:38 bluesun kernel: [ 283.323475] usb 3-11.4: ep 0x82 - rounding interval to 1024 microframes, ep desc says 2040 microframes
Mar 6 09:26:38 bluesun mtp-probe: checking bus 3, device 9: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.4"
Mar 6 09:26:38 bluesun mtp-probe: bus: 3, device: 9 was not an MTP device

While the following is shown with the extra modules installed:

Mar 6 10:10:26 bluesun kernel: [ 723.978837] usb 3-11.4: USB disconnect, device number 4
Mar 6 10:10:29 bluesun kernel: [ 727.007090] usb 3-11.4: new low-speed USB device number 5 using xhci_hcd
Mar 6 10:10:29 bluesun kernel: [ 727.029216] usb 3-11.4: New USB device found, idVendor=046d, idProduct=c31c
Mar 6 10:10:29 bluesun kernel: [ 727.029218] usb 3-11.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Mar 6 10:10:29 bluesun kernel: [ 727.029220] usb 3-11.4: Product: USB Keyboard
Mar 6 10:10:29 bluesun kernel: [ 727.029221] usb 3-11.4: Manufacturer: Logitech
Mar 6 10:10:29 bluesun kernel: [ 727.029359] usb 3-11.4: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes
Mar 6 10:10:29 bluesun kernel: [ 727.029362] usb 3-11.4: ep 0x82 - rounding interval to 1024 microframes, ep desc says 2040 microframes
Mar 6 10:10:29 bluesun kernel: [ 727.034458] input: Logitech USB Keyboard as /devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.4/3-11.4:1.0/input/input15
Mar 6 10:10:29 bluesun kernel: [ 727.034609] hid-generic 0003:046D:C31C.0004: input,hidraw1: USB HID v1.10 Keyboard [Logitech USB Keyboard] on usb-0000:00:14.0-11.4/input0
Mar 6 10:10:29 bluesun kernel: [ 727.041812] input: Logitech USB Keyboard as /devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.4/3-11.4:1.1/input/input16
Mar 6 10:10:29 bluesun kernel: [ 727.042018] hid-generic 0003:046D:C31C.0005: input,hidraw2: USB HID v1.10 Device [Logitech USB Keyboard] on usb-0000:00:14.0-11.4/input1
Mar 6 10:10:29 bluesun mtp-probe: checking bus 3, device 5: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.4"
Mar 6 10:10:29 bluesun mtp-probe: bus: 3, device: 5 was not an MTP device
...
Mar 6 10:12:16 bluesun kernel: [ 833.408217] usb 3-11.3: USB disconnect, device number 3
Mar 6 10:12:18 bluesun kernel: [ 835.413604] usb 3-11.3: new low-speed USB device number 6 using xhci_hcd
Mar 6 10:12:18 bluesun kernel: [ 835.434077] usb 3-11.3: New USB device found, idVendor=046d, idProduct=c05a
Mar 6 10:12:18 bluesun kernel: [ 835.434080] usb 3-11.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Mar 6 10:12:18 bluesun kernel: [ 835.434081] usb 3-11.3: Product: USB Optical Mouse
Mar 6 10:12:18 bluesun kernel: [ 835.434082] usb 3-11.3: Manufacturer: Logitech
Mar 6 10:12:18 bluesun kernel: [ 835.434225] usb 3-11.3: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes
Mar 6 10:12:18 bluesun kernel: [ 835.436436] input: Logitech USB Optical Mouse as /devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.3/3-11.3:1.0/input/input17
Mar 6 10:12:18 bluesun kernel: [ 835.436675] hid-generic 0003:046D:C05A.0006: input,hidraw0: USB HID v1.11 Mouse [Logitech USB Optical Mouse] on usb-0000:00:14.0-11.3/input0
Mar 6 10:12:18 bluesun mtp-probe: checking bus 3, device 6: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.3"
Mar 6 10:12:18 bluesun mtp-probe: bus: 3, device: 6 was not an MTP device