Sorry you must have misunderstood - I also don't have this stepdown. The stepdown mentioned relates to what Windows Vista is offering (observed with the CPU-Z utility). In Ubuntu the machine runs remarkably noisy which is a major annoyance for me, I am really satisfied with the box except this crucial point.
When reading through the ACPI documentation I found the hint, that some DSDT tables distinguish between operating systems, determining what they will support and what they won't. Examining some links I found this interesting Forum posting related (but maybe slightly outdated) to the DSDT problem: http://forums.gentoo.org/viewtopic.php?t=122145 Analyzing the DSDT of my machine, I also spotted this OS-distinguishing evaluations in the code mentioned there. When I get my hands on the machine tomorrow, I will try to use the suggested "acpi_os_name=" boot parameter, supplying one of the operating systems used in my original DSDT to see if the behaviour improves. The very annoying fact is that there seems to exist a setting "enable EIST" in some BIOSes which enable the speed step features using ACPI, but of course the BIOS in my machine (and I upgraded to the newest one) doesn't offer that. -- cpufreq modules missing in hardy and intrepid amd64 https://bugs.launchpad.net/bugs/246434 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
