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". Updating the BIOS to a more recent version did also not help. Thanks for your hints. Sven
