Public bug reported:
usb-c ports (4) are limited to 480 Mb/s. Should be 10 Gb/s any device selecting a higher speed is ignored, no output to **dmesg --human --follow** (bus usb4…6) hardware is Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 4C 2018] [8086:15ec] (rev 06) usb-a ports (2) work at 5 Gb/s (bus usb1…2) Hardware is Mac mini (2018) Macmini8,1 Linux is linux-generic-hwe-20.04 uname --release 5.8.0-36-generic usb bus speeds: for A in /sys/bus/usb/devices/usb*; do echo "$(basename $A): $(< $A/speed)"; done usb1: 480 usb2: 10000 usb3: 480 usb4: 10000 usb5: 480 usb6: 10000 usb controllers: find /sys/devices -regextype egrep -regex '.*/usb[0-9]+' /sys/devices/pci0000:00/0000:00:01.2/0000:7b:00.0/0000:7c:02.0/0000:7e:00.0/usb5 /sys/devices/pci0000:00/0000:00:01.2/0000:7b:00.0/0000:7c:02.0/0000:7e:00.0/usb6 /sys/devices/pci0000:00/0000:00:01.1/0000:05:00.0/0000:06:02.0/0000:08:00.0/usb3 /sys/devices/pci0000:00/0000:00:01.1/0000:05:00.0/0000:06:02.0/0000:08:00.0/usb4 /sys/devices/pci0000:00/0000:00:14.0/usb1 /sys/devices/pci0000:00/0000:00:14.0/usb2 usb controller modules and drivers: lspci -knns14 00:14.0 USB controller [0c03]: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller [8086:a36d] (rev 10) Subsystem: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller [8086:7270] Kernel driver in use: xhci_hcd Kernel modules: xhci_pci lspci -knns7e:0 7e:00.0 USB controller [0c03]: Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 4C 2018] [8086:15ec] (rev 06) Subsystem: Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 4C 2018] [8086:0000] Kernel driver in use: xhci_hcd Kernel modules: xhci_pci lspci -knns8:0 08:00.0 USB controller [0c03]: Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 4C 2018] [8086:15ec] (rev 06) Subsystem: Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 4C 2018] [8086:0000] Kernel driver in use: xhci_hcd Kernel modules: xhci_pci **lsb_release -rd** Description: Ubuntu 20.04.2 LTS Release: 20.04 ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1914845 Title: usb-c ports Titan Ridge capped at 480 Mb/s To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1914845/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs