Crap. My Ubuntu machine won’t boot

This sucks. On some very rare occasions, when I connect an SD card reader to my Ubuntu machine, it freezes. Normally I just reboot and everything is fine. But this time my Ubuntu machine won’t boot, and it shows a message like

Starting up …
Loading, please wait…
kinit: name_to_dev_t(/dev/disk/by-uuid/bd656dcd-04b4-412f-a880-62a6553bd8b) = sda5(8,5)
kinit: trying to resume from /dev/disk/by-uuid/bd656dcd-04b4-412f-a880-62a6553bd8b
kinit: No resume image, doing normal boot…

Then it hangs forever. Any Ubuntu/Linux gurus have suggestions on how to repair my system so it will boot?