Public bug reported:
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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
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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.
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1878602/+subscriptions
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