** Attachment added: "dmesg" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1878602/+attachment/5371507/+files/dmesg
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1878602 Title: When TBT dock is plugged into ICL TBT xHCI, port without device is in CAS state, causes many warm reset fail Status in linux package in Ubuntu: Confirmed Bug description: Since we can't use bugzilla for USB bugs, let's use Launchpad so we can attach dmesg :) System: XPS 9300 ICL Dock: Dell WD19TB Thunderbolt dock Linux: 5.7-rc5 Right after the dock is plugged, [ 127.205823] xhci_hcd 0000:00:0d.0: Get port status 2-1 read: 0x10202a0, return 0x10341 [ 127.205832] usb usb2-port1: status 0341 change 0001 CAS is flagged so warm-reset ensues: [ 127.313467] usb usb2-port1: do warm reset However, it seems nothing is connected to usb2-port1, causes many warm-reset fail, hence this error message: [ 132.158968] usb usb2-port1: Cannot enable. Maybe the USB cable is bad? This issue doesn't happen on CML system with AR/TR TBT controller. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1878602/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
