On Mon, 19 Jun 2006, Matt Britt wrote: > I have a home-made device that draws its power from a USB port. > Unfortunately, with late Linux kernels on some laptops, it can't draw > adequate current to power itself. Is there any way to force an internal > hub to allow maximum USB spec current draw? Yes, I know that it breaks > USB spec to draw more than 100 mA from a port before registering a > device, but my device is nothing more than a few TTL shift registers and > can draw no more than about 200 mA (usually much less). Any ideas?
The kernel does not control the amount of current available on a computer's USB port. So long as the port is turned on, the full 500 mA is available. Or if it isn't, it's a limitation of the hardware and not of the kernel. Alan Stern _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
