Re: Kernel Panic
If the caps lock light starts blinking, then yes you have had a kernel panic.
Having X crash back to the login screen, along with kernel panics, suggests to me that you are using proprietary graphics drivers; is this correct? Disable them or upgrade to the latest version if possible, and see if the problem persists.
The "couple of seconds at a time" freezes are nothing to worry about; it just means that your computer is temporarily working at 100% of capacity.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.
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