Comment 29 for bug 246222

re: Filing bugs against the kernel - that's only reasonable when there is in fact a kernel bug. There are plenty of ACPI bugs that cannot be labeled as kernel bugs, or fixed by other kernel patches. E.g. the new AMD-based Lenovo Thinkpads are *missing* the PSS tables, because Lenovo simply released these machines too early, with an incomplete BIOS. So CPU frequency scaling is unavailable without patching these tables into the DSDT. No amount of kernel fixing can make up for totally missing ACPI info, the only solution is to fix the DSDT.