@koba, with everything removed there is no ACPI error on plugging the dock back in. However, if I start plugging external devices back into the dock after it has registered with the system, the USB reset loop behaviour is still exactly the same as in the original post.
In the attached log, I removed the dock (with nothing attached to it) at 22:00:11, plugged it back in at 22:00:23 with nothing attached to it, started attaching external devices to it at 22:01:33. ** Attachment added: "kern-nousb-nomonitor.log" https://bugs.launchpad.net/ubuntu/+source/linux-meta-oem-5.6/+bug/1922336/+attachment/5495605/+files/kern-nousb-nomonitor.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1922336 Title: ACPI errors and USB reset loop when hot-plugging a Titan Ridge laptop into a dock (9500, TB16) To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1922336/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
