Hello Oliver, >> I have rebuild the option module with CONFIG_PM=N doing the following steps: >> >> - set CONFIG_PM=N in /usr/src/linux/linux-2.6.32-41 >> - make modules SUBDIRS=drivers/usb/serial/ >> - copied option.ko to /lib/modules/... >> - rmmod option >> - modprobe -f option > > Do you use autosuspend? > Yes it is activated here. I have deactivated it and the messages doesn't appear again. Do you think that this can cause such crash behaviour? Do you need any more logs or infos? Thanks, Regards Patrick -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html