Am Montag, den 23.03.2020, 17:29 +0000 schrieb Qais Yousef: > Hi Oliver Hi, > First time I use dynamic debugging, hopefully I've done correctly. I am afraid not. > echo "file drivers/usb/* +p" > /sys/kernel/debug/dynamic_debug/control Overkill but correct. +mpf would be even better > $REPRODUCE Good > cat /sys/kernel/debug/dynamic_debug/control | grep usb > usb.debug No. /sys/kernel/debug/dynamic_debug/control holds the collection of the messages that may be triggered, but it does not tell you which messages are triggered and in which order. The triggered messages end up in syslog. So you would use 'dmesg' I am afraid you redid the test correctly and then threw away the result. Could you redo it and just attach the output of dmesg? Sorry Oliver