On Wed, Jan 16, 2013 at 06:16:00PM -0600, Leonid Isaev wrote: > > [ fixup Andre's address. ] > > > > On Wed, Jan 16, 2013 at 11:33:21PM +0100, Rafael J. Wysocki wrote: > > > > down the frequancy, but is accompanied by an info-level kernel message > > > > "acpi-cpufreq: overriding BIOS provided _PSD data". > > > > That just says that BIOS has crappy data and we're using our own. > > OK. Yes, my BIOS is broken, so I thought it was the reason why autoloading does > not work. Hmm, come to think of it, we're issuing this message on SMP on *all* AMDs with HW_PSTATE. Andre, remind me again why we're doing this? We're basically saying that we're overriding ACPI data but we still read it out from acpi_perf_data and use *that* data to prepare the frequencies table. What am I missing? > To be more precise: "modprobe powernow-k8" returns a "no such device" error, That's correct - we say ENODEV on your CPU which supports hardware P-states and hand off to acpi-cpufreq which has that functionality now. > but in kernel logs I see that acpi-cpufreq is indeed loaded: > ------- > Jan 15 22:42:19 metal-0 kernel: [ 534.003995] acpi-cpufreq: overriding BIOS > provided _PSD data > Jan 15 22:42:32 metal-0 kernel: [ 547.122695] powernow-k8: this CPU is not > supported anymore, using acpi-cpufreq instead. > Jan 15 22:42:45 metal-0 kernel: [ 559.623068] powernow-k8: this CPU is not > supported anymore, using acpi-cpufreq instead. > ------- > (the CPU in question is phenom II x4 955). However, this is only after I > attempt to _manually_ load powernow-k8 (the timestamps in [...] are ~6 mins > after boot is completed). So the above-mentioned handoff seems to work, but > please find attached my kernel config. Ok, this is maybe the issue. What used to load powernow-k8 on your distro before? Because basically it's enough if some script did 'modprobe powernow-k8' for the handoff to just work. But, we also have the CPU autoprobing deal: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=644e9cbbe3fc032cc92d0936057e166a994dc246 so, *actually*, powernow-k8 should be loaded by default. I dunno, maybe upgrade udev on your distro? Btw, your config looks fine: CONFIG_X86_POWERNOW_K8=m CONFIG_X86_ACPI_CPUFREQ=m Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
