https://bugzilla.kernel.org/show_bug.cgi?id=217089 --- Comment #10 from Alan Stern (stern@xxxxxxxxxxxxxxxxxxx) --- The attachments are pretty clear. The most likely explanation is that something gets sent to the device under one kernel but not the other, something which causes it to change its firmware. The next step is to collect a usbmon trace showing what happens when the device is plugged in. As root, do: cat /sys/kernel/debug/usb/usbmon/1u >FILENAME before plugging in the device. A few seconds after the Xone is plugged in, kill the command with ^C and attach the output file to this bug report. Do this for both of the kernels, and we'll see if anything is different between them. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.