On Tue, Jul 24, 2012 at 3:24 AM, Sven Gaerner <sgaer...@gmx.net> wrote: > On Mon, Jul 23, 2012 at 09:44:06AM +0800, Sepherosa Ziehau wrote: >> On Mon, Jul 23, 2012 at 3:27 AM, Sascha Wildner <s...@online.de> wrote: >> > On Sun, 22 Jul 2012 21:16:54 +0200, Sven Gaerner <sgaer...@gmx.net> wrote: >> > >> >> On Sun, Jul 22, 2012 at 08:31:41PM +0200, Sascha Wildner wrote: >> >>> >> >>> On Sun, 22 Jul 2012 13:46:41 +0200, Sven Gaerner <sgaer...@gmx.net> >> >>> wrote: >> >>> >> >>> >[...] >> >> Hmm, disabling UEFI is OK, but make sure that you have enabled EST in >> BIOS (something probably read like "enhanced speed step" or something >> like "P-state"). > There is no such option. And the only UEFI option is to enable booting > of an UEFI compliant OS. Speed stepping cannot be configured. The BIOS > options are very limited. > >> Besides CPU P-State, you could also set allowable CPU C-State to C3 by >> setting sysctl hw.acpi.cpu.cx_lowest and put tunable >> hw.i8254.intr_disable="0" in /boot/loader.conf (you need to reboot >> after changing /boot/loader.conf). However, it should be noted that >> enabling C3 will disable LAPIC timer and i8254 timer will be used >> instead, which may cause extra overhead. > This seems not to change anything. The temperature remains the same. And > setting hw.acpi.cpu.cx_lowest returns with "Invalid Argument".
I mean following steps: 1) Add the following line into into /boot/loader.conf, then reboot: hw.i8254.intr_disable="0" 2) sysctl hw.acpi.cpu.cx_lowest=C3 Best Regards, sephe -- Tomorrow Will Never Die