On Thu, Apr 23, 2015 at 09:50:14PM +0100, Chris Bainbridge wrote: > Hardware: IvyBridge Macbook (Panther Point PCH), 2 external USB3 ports > Verified in kernels: 4.0.0+ (1fc1499), Debian 3.16.4 > > All USB3 devices appear as USB2 high-speed (480mbps) rather than USB3 > super-speed (5000mbps).
Are you sure you actually have a device that runs at that speed? A USB 3 device can run at "low speed" and still be USB 3 compliant (backwards compatibility issues ensure this.) > Booting with nothing plugged in to the USB3 ports and then plugging in a > single > Sandisk Extreme USB3 flash drive shows the same behaviour, no "super-speed". > The drive is capable of SuperSpeed: > > # lsusb -v -d 0781:5580 | grep peed > SuperSpeed USB Device Capability: > wSpeedsSupported 0x000e > Device can operate at Full Speed (12Mbps) > Device can operate at High Speed (480Mbps) > Device can operate at SuperSpeed (5Gbps) > Lowest fully-functional device speed is Full Speed (12Mbps) That's interesting, does it show up as a SuperSpeed device plugged into any other machine? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
