https://bugzilla.kernel.org/show_bug.cgi?id=214021 --- Comment #13 from Chris Chiu (chris.chiu@xxxxxxxxxxxxx) --- Mathias, thanks for the analysis since I've ran out of ideas for debugging this. In my case, even a single line printk in either xhci-hub.c or hub.c before hub_power_on() can make difference (undetected -> detected). But I can always reproduce with the clean code. Let me know if there's any patch I can help test. Thanks -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.