Thank you for taking the time to report this bug and helping to make
Ubuntu better. Reviewing your dmesg attachment to this bug report it
seems that there may be a problem with your hardware. I'd recommend
performing a back up and then investigating the situation. Measures you
might take include
In addition to the dmesg entries that look like hardware errors, it
appears this machine's kernel is over two years old -- is that
intentional?
Thanks
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https://bugs.launchpad.net/bugs/189