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Debugging "cpu freezes"

DISCUSSION Michael 2 participants 2 messages Dec 24, 2002 – Dec 25, 2002

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Michael

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I'm wondering what the procedure for debugging instances where the computer freezes completly, when sysRQ doesn't even work.
Since I know how to reproduce(and workaround for daily use) a complete system freeze in 2.4.X, don't know if I can explain how, but for example booting the knoppix live-cd to kde would be a perfect way of freezing it(after moving a few windows) (Not using KDE reduces the risk of it freezing greatly)

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On Tuesday 24 December 2002 19:56, Michael wrote:

Hi Michael,

Quoted 6 lines

I'm wondering what the procedure for debugging instances where the computer freezes completly, when sysRQ doesn't even work. Since I know how to reproduce(and workaround for daily use) a complete system freeze in 2.4.X, don't know if I can explain how, but for example booting the knoppix live-cd to kde would be a perfect way of freezing it(after moving a few windows) (Not using KDE reduces the risk of it freezing greatly)

you could try boot parameter nmi_watchdog=1 or =2
(Read Documentation/nmi_watchdog.txt).

ciao, Marc