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Is the USB power supply always on? And if not, how to write a driver

I have a device that comes with an AC power adapter, where the connector is a mini-USB plug. The device does not seem to be powered by the computer’s USB port (using a standard USB-to-mini-USB cable), unless a specific driver is installed. The driver is available only for Windows. I would like to charge the device from USB connectors on different platforms.

My question is: why power does not come to the device without a driver? Is a USB driver always required to start powering up? Or is this device specifically designed to not charge you if any software program does not run it for this?

I assume that my question can be summarized as follows: Is there no power on the USB cable or is it present, but the device ignores it. If the answer is the first, I’ll try to understand how to write software that will always maintain tension.

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Why is power not supplied to the device without a driver?

USB ports always turn on when the computer is turned on, and the USB management software does not detect the current conversationalist.

Is a USB port driver required to start powering up?

No, the USB port must always power up the device, otherwise the device will never be able to initiate a connection.

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If you do not have the manufacturer’s specifications, I think you're out of luck. You could try reverse-engineering the driver to see what it does, but I would expect it to be cheaper and easier to just buy it using cross-platform drivers or charges without a driver.

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