disabling usb devices in a laptop

Brandon Stout bms at mscis.org
Thu Dec 11 16:08:11 MST 2008


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Andrew McNabb wrote:

> I recently ran powertop on a laptop and noticed that the webcam and
> bluetooth devices (both of which are connected via an internal USB hub),
> are always on.  They are both sucking power, and the webcam is also
> hitting the CPU with a constant stream of interrupts.  Since I'm not
> using them, I would love to disable these devices.
>
> So far I have tried unloading the kernel modules, which didn't work, and
> blacklisting them so they can't load in the first place, which also
> didn't work.  Unfortunately, the BIOS is limited and doesn't give any
> options for disabling specific devices.
>
> Has anyone run into this problem before?  How do you turn off a USB
> device without snipping the wires?

Why not just unplug the devices since you're not using them anyway?

Brandon Stout
Stout Hosting LLC

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