On 3/2/21 3:47 AM, Frederic Muller wrote:
So now how can configure Fedora 33 to get the optimum speed is the
question. Are there BIOS or system settings that make it happen? The X1
3rd gen now has a new bios, not the 6th gen. The 6th gen went from
400MB/s down to 40MB/s switching from F32 to F33, the 3rd gen went from
45 to 85 switching from F32 to F33. I am just trying to understand what
is giving those very different speeds. And yes it is really weird.
Your original post was rather unclear on this part. I mostly couldn't
tell which computer and OS combination was getting which speed. A table
or something like that would have helped.
As Roberto suggested, you should use "lsusb -t". Here's the output from
a laptop with a USB3 SSD attached:
$ lsusb -t
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
|__ Port 6: Dev 2, If 0, Class=Mass Storage, Driver=uas, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
|__ Port 2: Dev 2, If 0, Class=Human Interface Device,
Driver=usbhid, 12M
|__ Port 5: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
|__ Port 6: Dev 28, If 0, Class=Human Interface Device,
Driver=usbhid, 1.5M
|__ Port 7: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 7: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M
|__ Port 12: Dev 6, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 12: Dev 6, If 0, Class=Wireless, Driver=btusb, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
xhci indicates a USB3 interface. The last number on each line shows the
speed. You can see the SSD at the top getting an available bandwidth of
5Gb.
I moved it to a different port:
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
|__ Port 2: Dev 2, If 0, Class=Human Interface Device,
Driver=usbhid, 12M
|__ Port 5: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
|__ Port 6: Dev 29, If 0, Class=Mass Storage, Driver=uas, 480M
It's only getting 480Mb now.
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