This may be no file system error.

Please read the message carefully. It just states that your phone did not cleanly shut down.
There is a security mechanism to not load some crappy profile for the kernel- power settings. The message informs you about this, so you as a power user, that you are , may have to rethink the profiles settings, or just load your settings , if you think the settings were not to blame for the unclean shutdown.
May be you were changing batteries to early during shutdown, or some i/o load forced a crash of the phone, or during charging the kernel crashed the phone (which mine does quite often...)

Please give some terminal output to evaluateIf your kernel version put out by the last command finishes with 'powerXY', where X and Y are digits, please also post