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Power off



I ran into a problem (bug?) that I would like to help solve, but I'm at a loss as to where to go next. My laptop (Dell C400) used to run Linux just fine, dual boot with Windows. In the past few months, I've installed XP SP2 on the Windows side, reinstalled Windows a few times (it happens), and updated by BIOS image. I somehow managed to trash my partition table attempting to put GRUB back as my bootloader, then had to reinstall everything all over again (windows and Linux). I've since downgraded the BIOS to the previous known-good version to try and fix the thing. Windows works fine, but on the Linux side....

The computer powers itself off without warning--no matter what is, or isn't, running. Certain things seem to trigger it, and it may be tied to high CPU load. I can trigger the shutdown fairly reliably by running aircrack on a packet capture file. To rule out any background services as being the culprit, I booted with init=/bin/bash, ran aircrack, and sure enough, it powered off after about 90 seconds. This behavior has continued no matter what kernel I use--I'ved tried with both the original FC3 kernel and the most recent one. In fact, the machine powered itself down a number of times while I was running off the install CD. It took 10 tries before I got it to complete the install process.

So, my question to you all is--how can I possibly get some useful information to start diagnosing this problem? There's nothing in the logs on disk, of course. There's no warning, no panic, no nothing. Just a quick *plink* and it's gone.


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