During my work with linux-phc I noticed that some combinations of Intel Pentium M (centrino based) CPUs and BIOSes fail to work using acpi- cpufreq but working with speedstep-centrino.
The problem is somewhere within the ACPI subsystem that decides that the system lacks some needed functionality (-> SYSTEM_IO_CAPABLE instead of SYSTEM_MSR_CAPABLE). Until 8.10 the speedstep-centrino did the work. Not that the Ubuntu devs decided to compile-in processor drivers speedstep-centrino can not work (because acpi-cpufreq blocks the device since it took over the functions). The only way to those certain users will be to compile their own kernel and set acpi-cpufreq as module again (or completely remove it) to be able to use speedstep-centrino again. -- cpu frequency scaling not supported after upgrading to 9.04 https://bugs.launchpad.net/bugs/365798 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
