8 13:14:06 gi-ubuntu kernel: [10078.684358] end_request: I/O error, dev sr0, sector 9180404
May 18 13:14:06 gi-ubuntu kernel: [10078.684405] UDF-fs: error (device sr0): udf_read_tagged: read failed, block=1883165, location=1883165
May 18 13:14:07 gi-ubuntu kernel: [10079.426989] UDF-fs: warning (device sr0): udf_load_vrs: No anchor found
May 18 13:14:07 gi-ubuntu kernel: [10079.426994] UDF-fs: warning (device sr0): udf_fill_super: No partition found (1)
May 18 13:14:52 gi-ubuntu gnome-session[1774]: WARNING: Unable to restart system: Authorization is required