I updated my Ubuntu box today. Everything went smooth until I noticed that the system was slower. My 686 SMP kernel was replaced by a 386. 😐 Being used to surprises like this one with the Ubuntu updates, I downloaded and installed the lastest SMP kernel. After installation, the darn thing booted up slower than a snail… One way to fix this is to add “idle=halt” in the kernel boot options ( gedit /boot/grub/menu.lst ). This happens because of a bug in the ACPI CPU power states and affects HT processors as well as dual processor systems.
[tags]Ubuntu, SMP, Kernel, dual processor, HT[/tags]
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