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I've connected a USB/Bluetooth wireless mouse.

When I don't touch it during an extended period of time and then move, the cursor does not move (and I do not see the red light in the mouse). It starts working again after I press the button.

Why? What happens?

I use recent Debian Linux.

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Sounds like a driver issue. The device is going in a low powered state. It requires a button press to get out of it. – Ramhound Oct 2 '13 at 16:13
I think it's more by design, if you walk away from your pc and aren't using your mouse keeping it 'alive' in a ready state uses more battery. It wouldn't know how long to wait before it powered down. Have a look at the documentation, there might be a way to alter this idle time but my guess is it's built into the HW – Joe Taylor Oct 2 '13 at 16:18
Power saving mode... If you don't want lag or to worry about waking up wireless mice (which sleep to attempt to be helpful), I would suggest a wired mouse. – nerdwaller Oct 2 '13 at 16:18
Sigma, model SI9126 or Sl9126 – porton Oct 2 '13 at 16:30
@Moses - We are talking about an Linux operating system. The driver support likely is very generic. – Ramhound Oct 2 '13 at 16:31

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