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When I suspend or hibernate my laptop, the Ksoftirqd/0 or Ksoftirqd/1 process runs on 100% continuously. I have to reboot or shutdown my laptop then. This happens in Ubuntu 10.04, 10.10, 11.04 and all variants.

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The problem is very probable with the driver of your network card: Google reveals a lot of similar problems elsewhere: like in Finnish this.

So simply disable the unnecessary drivers or update old ones.

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