framarot spero tu sia il mio salvatore trovando la soluzione

sono nella tua STESSA IDENTICA situazione
luca@luca-System-Product-Name:~$ su root
root@luca-System-Product-Name:/home/luca# lsusb
Bus 002 Device 010: ID 0781:5539 SanDisk Corp.
Bus 002 Device 005: ID 0d62:2019 Darfon Electronics Corp.
Bus 002 Device 003: ID 0df6:005b Sitecom Europe B.V.
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@luca-System-Product-Name:/home/luca# dmesg|tail
[ 2317.204977] sr 11:0:0:1: [sr1] CDB: Read(10): 28 00 00 00 00 00 00 00 02 00
[ 2317.204988] end_request: I/O error, dev sr1, sector 0
[ 2317.204994] Buffer I/O error on device sr1, logical block 0
[ 2317.204998] Buffer I/O error on device sr1, logical block 1
[ 2338.052199] r8169 0000:01:00.0: eth0: link down
[ 2338.052207] r8169 0000:01:00.0: eth0: link down
[ 2338.052474] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 2341.127275] r8169 0000:01:00.0: eth0: link up
[ 2341.127499] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 2351.214520] eth0: no IPv6 routers present