Acer Aspire One and WMI devices problem in Linux

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Does anyone know how to get the WMI (or ACPI) devices working properly for an Acer Aspire One D250 netbook that is running Ubuntu Lucid? I have checked out all the information that I can see on the subject, and the best information I have found so far is on the Ubuntu Forums, a thread entitled "How to fix wmid devices!! ! Error on your netbook.ubuntu systems" (sorry, I'm new on WrongPlanet, and don't have permission to post links yet).

I am running GKrellM and I cannot get any of the hardware sensors to display, except for the CPU temp, which never changes from 27°C. I'd like to be able to get the hardware sensors working. As mentioned in the Ubuntu Forums thread above, I don't just want to disable the interruption to the splash screen during the boot sequence. I want to have a fix, and not just a workaround. Any ideas?