Sarah Sharp wrote:
> a userspace program claims the interface via usbfs and reads from
> the device when it wants to capture a finger scan.  The kernel's
> "auto" power policy would turn back on the port as soon as the
> interface was claimed through usbfs.

This translates to a slightly less appealing user experience where
users can't simply swipe finger to unlock a locked screen but must
first wake up the userspace process, or to smaller power savings,
if the port can never be powered off as long as the screen is locked.


//Peter
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