Thank you for taking the time to report this bug and helping to make
Ubuntu better. Reviewing your dmesg attachment in this bug report it
seems that there is a problem with your hardware. I recommend
performing a back up and then investigating the situation. Measures you
might take include check
The error in your log is:
Setting up libpam-runtime (1.1.8-3.6ubuntu2) ...
ESC[1mdpkg:ESC[0m error processing package libpam-runtime (--configure):
installed libpam-runtime package post-installation script subprocess was
killed by signal (Bus error), core dumped
This is a very well-exercised sh