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My computer is running fine, and gentoo boots, but i notice that during booting the kernel throws some strange messages. I not sure whether to be concerned or not. The output of dmesg | grep ACPI is as follows. Note the errors. They have not affected system performance as far as I can tell...but I would still like to fix them up. Any help is appreciated.
If you're running a fairly recent kernel (up to date as far as your distribution is concerned), then the most likely cause is an out of date BIOS. Make sure you are running the latest BIOS for your machine from your manufacturer. These BIOS ACPI issues are frequently corrected after the machines/motherboards have been manufacturered.