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View Full Version : [ubuntu] usb hub full-speed vs high-speed



mizar66
June 7th, 2012, 05:21 PM
On Precise, connecting a 4port usb hub I get:



lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4 USB 2.0 Hub
and



dmesg
[ 137.228102] usb 2-1: new full-speed USB device number 4 using uhci_hcd
[ 137.409553] hub 2-1:1.0: USB hub found
[ 137.411290] hub 2-1:1.0: 4 ports detected
So it seems it is a 2.0 hub but it is recognised as a full-speed usb device and uses uhci instead of ehci.

What could be wrong? Is there a way to force the hub in high-speed mode?

TIA

jraftb
June 20th, 2012, 02:51 AM
im owundering the same thing as im told this is why my mouse wont work, it shows as a 1.1 hub instead of a 2.0