Upgrading my wife's five year old System 76 PC to 14.04. Install went fine. On restart I got a couple of "Problem detected, would you like to submit a report" messages, but no details. After that, and on a subsequent restart, I get three "can't find file"s, followed by a "hit any key to continue". Then get a "scanning for Btrfs files" for a minute or so. At that point I get my usual home screen. The few programs I've checked seem to work. However, the HDD keeps seeking, irregular pattern, for five or ten minutes before settling down. System Monitor shows low CPU use, low swap, low network. Highest activity process is the System Monitor.
To be honest, I don't know what file system I'm using -- it's the Ubuntu default. This is a vanilla install, with normal updates. We were running 12.04 until earlier this year, when we upgraded to 13.04 in preparation for this move.
So, what's my next move to troubleshoot this?
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