There appear to be repeating file system problems so I recommend
investigating those first. I can't tell if it's a harddisk or an optical
drive...
[19894.148839] SQUASHFS error: xz decompression failed, data probably corrupt
[19894.148842] SQUASHFS error: squashfs_read_data failed to read block
Thanks for taking the time to report this bug and helping to make Ubuntu
better. We appreciate the difficulties you are facing, but this appears
to be a "regular" (non-security) bug. I have unmarked it as a security
issue since this bug does not show evidence of allowing attackers to
cross
