You are describing a BIOS initiated safety shutdown.
Most BIOS's will shut down the system immediately when the temperature
hits a prescribed limit.
I would run memtest (boot the ubuntu CD and select memtest) for a 24
hour period and see when it shuts down, reboot the PC after a few
minutes go into BIOS settings and check the temperatures.
This is typically indicative of a hardware problem (failing CPU, dead
fans, etc.)
You may want to consider getting a notebook cooler to try and keep the
temps down, but it's likely something has failed.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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shutdown after extreme heating while watching videos or doing long numerical
simulations on msi m670
https://bugs.launchpad.net/bugs/382730
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