I have a similar problem...
but it seems the mouse would turn off during the boot up before KDE is called?
it worked fine before...I moved the computer to another desk, then this message came up..I swapped another HD, it works again...I upgraded to 8.1, now it wont work again...strange...
Code:
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
usbus2: 480Mbps High Speed USB v2.0
usbus3: 12Mbps Full Speed USB v1.0
usbus4: 12Mbps Full Speed USB v1.0
usbus5: 480Mbps High Speed USB v2.0
usbus6: 12Mbps Full Speed USB v1.0
ad10: 953869MB <Hitachi HDS721010CLA332 JP4OA39C> at ata5-master SATA300
ugen0.1: <ATI> at usbus0
uhub0: <ATI OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <ATI> at usbus1
uhub1: <ATI OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
ugen2.1: <ATI> at usbus2
uhub2: <ATI EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2
ugen3.1: <ATI> at usbus3
uhub3: <ATI OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus3
ugen4.1: <ATI> at usbus4
uhub4: <ATI OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus4
ugen5.1: <ATI> at usbus5
uhub5: <ATI EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus5
ugen6.1: <ATI> at usbus6
uhub6: <ATI OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus6
SMP: AP CPU #2 Launched!
SMP: AP CPU #1 Launched!
SMP: AP CPU #3 Launched!
GEOM_MIRROR: Device mirror/gm0 launched (1/1).
GEOM: mirror/gm0s1: geometry does not match label (16h,63s != 255h,63s).
Root mount waiting for: usbus6 usbus5 usbus4 usbus3 usbus2 usbus1 usbus0
uhub6: 2 ports with 2 removable, self powered
uhub0: 3 ports with 3 removable, self powered
uhub1: 3 ports with 3 removable, self powered
uhub3: 3 ports with 3 removable, self powered
uhub4: 3 ports with 3 removable, self powered
Root mount waiting for: usbus5 usbus2
Root mount waiting for: usbus5 usbus2
uhub2: 6 ports with 6 removable, self powered
uhub5: 6 ports with 6 removable, self powered
Trying to mount root from ufs:/dev/mirror/gm0s1a
usb_alloc_device:1586: set address 2 failed (USB_ERR_TIMEOUT, ignored)
usb_alloc_device:1624: getting device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
usbd_req_re_enumerate:1539: addr=2, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_req_re_enumerate:1553: getting device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
usbd_req_re_enumerate:1539: addr=2, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_req_re_enumerate:1553: getting device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
ugen0.2: <(null)> at usbus0 (disconnected)
uhub_reattach_port:435: could not allocate new device!
usb_alloc_device:1586: set address 2 failed (USB_ERR_TIMEOUT, ignored)
usb_alloc_device:1624: getting device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
usbd_req_re_enumerate:1539: addr=2, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_req_re_enumerate:1553: getting device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
usbd_req_re_enumerate:1539: addr=2, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_req_re_enumerate:1553: getting device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
ugen0.2: <(null)> at usbus0 (disconnected)
uhub_reattach_port:435: could not allocate new device!
I tried with ACPI off and the same thing.