On Thu, Jan 17, 2013 at 10:46 AM, Borislav Petkov <bp@xxxxxxxxx> wrote: > 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 Arch relies entirely on the CPU autoprobing, there are no scripts modprobing things at boot. > so, *actually*, powernow-k8 should be loaded by default. I dunno, maybe > upgrade udev on your distro? Assuming Leonid's system is up-to-date, Arch ships the most recent udev version (197). Cheers, Tom -- 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
