I am running Linux on the very cheap iBall Compbook Excelance (an Indian company). Recently I was surprised to find that this laptop apparently has a USB 3.0 interface, or at least a bus. When I run
lsusb I get this:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 007: ID 15d9:0a4c Trust International B.V. USB+PS/2 Optical Mouse Bus 001 Device 005: ID 258a:6a88 Bus 001 Device 004: ID 093a:733a Pixart Imaging, Inc. Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. Hub Bus 001 Device 002: ID 0781:5567 SanDisk Corp. Cruzer Blade Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
The first line indicates that there's a USB 3.0 bus. Some online literature also lists the claim that there is one USB 3.0 port, but I can't find out if that's for the specific model I have (the model numbers are unclear).
But the above output applies when things are plugged into both USB ports - the mouse and the pen drive. Since nothing shows up on
Bus 002, does this mean there is no external facing USB 3.0 port? In which case I wonder why the bus is there.
Or is it that both of these are USB 2.0 devices (neither is USB 3.0 capable) that leads them to be attached to
Edit: This is the output of
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 5000M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 480M |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M |__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 4: Dev 8, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 4: Dev 10, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 3: Dev 9, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 2: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M |__ Port 2: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M |__ Port 3: Dev 5, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 3: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
Edit: This question in fact notes that USB 2.0 devices show up as connected to a USB 2.0 hub even if they are in a USB 3.0 port. I'll be getting a 3.0 pen drive in a day or two and will answer this question if that turns out to be the fix.
NB: Incidentally I have read the answers to this very similar question and none of them seems relevant to my question - neither port is blue and neither has SS next to it. But I don't feel like that is conclusive, since this is an extremely cheap laptop and many things are not as per standards.