On Sun, Jul 23, 2006 at 07:26:55PM +0100, Tim Green wrote:
On 7/22/06, Adam Bower adam@thebowery.co.uk wrote:
It could be that the mouse that was "faulty" needs more power than the mouse that works on both machines. The USB ports on the "faulty" machine might not be supplying enough power to the mouse so it sometimes does something that causes it to crap out, the new machine might have a better power supply on the usb ports than the old machine, and the mouse you stole from it perhaps uses less power.
How much power does a mouse need?!?
Usually between 50ma and 100ma, I'm thinking more along the lines that the machine might have faulty power regulation (or some such) on the USB bus that the old mouse (100ma for example) is drawing that bit much that freaks the USB out and the "new" mouse only pulls 50ma so works reliably. Most motherboards should supply 500ma to the USB ports but some machines have design features/flaws that mean they don't supply that much power at all.
It's just a theory ;)
Thanks Adam