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how to debug a random freezing problem?


I installed Ubuntu[1] (Debian w/ 2.6.8 kernel) on my Toshiba Satellite M30 Centrino laptop last week, and it's great, apart from the fact that the computer freezes up randomly. From what I can see, there is *no* pattern, but it usually takes about 3 hours' use, and then suddenly stops.

The only thing that responds is the little green light that comes on when I press the 'Fn' button - no CapsLock light. I just have to hit the power button.

I thought it might be something to do with overheating - if I use the laptop a lot, it seems to happen more often. I wrote a little script to find out the temperature in /proc/acpi/thermal_zone/THRM/temperature when it freezes, and it's usually around 66C, which is actually OK, isn't it?

I also tried adding noacpi nolapci to my GRUB config, but it didn't make any difference.

If anyone has *any* idea what might be causing this, or how I can home in on it, I'd be incredibly grateful - I'm trying to make the switch from Windoze, and this is just about the only thing holding me back (well, this and trying to suspend the laptop, but that's another thread... :)


[1] http://www.ubuntulinux.org

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