JVC Handy Mouse HC-MM55U works via unpowered hub but not direct.

[Julian Stacey]

My stick mouse: JVC Handy Mouse HC-MM55U, wont work direct, but
will via a hub, even unpowered (so not a 0.5A limit problem )!
(actually it'll work via 2 different hubs that look same profile
except for the paint job.

It's not an unsurmountable problem, but weird & unexpected.
Stick mouse will also work OK via a powered hub, (but that doesnt
prove much - one could assume it's just a very greedy mouse drawing
more than 0.5 Amp.  Though usbdevs -v reports : low speed, power
100 mA, config 1, rev 0.01.

I can make 2 guesses:
- Those hubs from vndr=0x04f1 might have a `big' electrolytic capacitor
  smoothing the supply ?
- Maybe the voltage levels of the signal from the mouse are rather lackse,
  & the computer direct is expecting more conformity to digital
  thresholds, whereas the hubs are more forgiving ?
I can't think of any other reason ?

Here's usbd -d -v on 6.1-RELEASE for th 2 magicly good hubs:

usbd: device-attach event at 1166660806.602716000, USB2.0 Hub Controller, NEC Corporation:
  vndr=0x0409 prdct=0x0058 rlse=0x0100 clss=0x0009 subclss=0x0000 prtcl=0x0000
  device names: uhub3
usbd: Found action 'JHS - Hub Zedi' for USB2.0 Hub Controller, NEC Corporation at uhub3
usbd: device-attach event at 1166660807.293715000, product 0x0001, vendor 0x04f1:
  vndr=0x04f1 prdct=0x0001 rlse=0x0001 clss=0x0000 subclss=0x0000 prtcl=0x0000
  device names: ums1
usbd: Found action 'JHS - Mouse Stick' for product 0x0001, vendor 0x04f1 at ums1
usbd: Executing 'moused -p /dev/${DEVNAME} -I /var/run/moused.${DEVNAME}.pid; vidcontrol -m on'
vidcontrol: getting active vty: Inappropriate ioctl for device
usbd: 'moused -p /dev/${DEVNAME} -I /var/run/moused.${DEVNAME}.pid; vidcontrol -m on' returned 1

usbd: device-attach event at 1166660873.890891000, product 0x6560, vendor 0x04b4:
  vndr=0x04b4 prdct=0x6560 rlse=0x0008 clss=0x0009 subclss=0x0000 prtcl=0x0000
  device names: uhub3
usbd: Found action 'JHS - Hub MBO' for product 0x6560, vendor 0x04b4 at uhub3
usbd: device-attach event at 1166660874.579183000, product 0x0001, vendor 0x04f1:
  vndr=0x04f1 prdct=0x0001 rlse=0x0001 clss=0x0000 subclss=0x0000 prtcl=0x0000
  device names: ums1
usbd: Found action 'JHS - Mouse Stick' for product 0x0001, vendor 0x04f1 at ums1
usbd: Executing 'moused -p /dev/${DEVNAME} -I /var/run/moused.${DEVNAME}.pid; vidcontrol -m on'
vidcontrol: getting active vty: Inappropriate ioctl for device
usbd: 'moused -p /dev/${DEVNAME} -I /var/run/moused.${DEVNAME}.pid; vidcontrol -m on' returned 1

Julian
-- 
Julian Stacey.  BSD Unix C Net Consultancy, Munich/Muenchen  http://berklix.com
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