Comment 2 for bug 429036

I have an ASUS G51J laptop with a Core i7 720QM processor. I myself found that the Turbo Boost is definitely not working.
I'm running Karmic Koala with the 2.6.31-15 Kernel.

From my experience, I found that the ACPI support might be broken. When I COMPLETELY disable ACPI support through the kernel boot options, I see a major performance boost when benchmarking using single threaded applications, compared to the same tests when using ACPI support. I tried other ACPI settings, but non of them seemed to have positive effects, except for disabling it entirely. Of course when I disable ACPI support, I loose all power management together with cpufreq support, plus I'm only able to access one of my 4 cores.

I've read that the recent kernels support this architecture including the Turbo Boost feature. Apparently some desktop users have posted to get their system fully working. This are the only informative sites I found, specificly about Turbo Boost on Linux:
http://kbase.redhat.com/faq/docs/DOC-17124
http://kolbusa.livejournal.com/71066.html