Alessandro, have you followed all the instructions in my comment
https://bugs.launchpad.net/ubuntu/jaunty/+source/linux/+bug/348316/comments/44
When you have really completed these instructions (deactivating AppArmor, blacklisting and unloading usblp), please post or attach the output of
lsusb ls -l /dev/bus/usb/*/* lsusb -vvv
and then take the strace again and attach it. Thanks. Tell also whether it prints or not.
Alessandro, have you followed all the instructions in my comment
https:/ /bugs.launchpad .net/ubuntu/ jaunty/ +source/ linux/+ bug/348316/ comments/ 44
When you have really completed these instructions (deactivating AppArmor, blacklisting and unloading usblp), please post or attach the output of
lsusb
ls -l /dev/bus/usb/*/*
lsusb -vvv
and then take the strace again and attach it. Thanks. Tell also whether it prints or not.