Date: Tue, 30 Nov 2004 16:21:42 -0800 From: Nate Lawson <nate@root.org> To: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au> Cc: freebsd-acpi@freebsd.org Subject: Re: ACPI differences 4.10 - 5.3, laptop problem Message-ID: <41AD0E96.7010306@root.org> In-Reply-To: <20041130233659.GC20263@squash.dsto.defence.gov.au> References: <20041130085340.GA76915@totem.fix.no> <20041130180546.BD4CC5D04@ptavv.es.net> <20041130233659.GC20263@squash.dsto.defence.gov.au>
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Wilkinson, Alex wrote: > 0n Tue, Nov 30, 2004 at 10:05:46AM -0800, Kevin Oberman wrote: > > > Looks like the same processor I have and you can try adding: > > options CPU_ENABLE_TCC > > to your kernel. This enables the P4 Thermal Control which will let you > > throttle the speed of the CPU without ACPI. Use the hw.p4tcc sysctls to > > manage the speed. > > Kevin, why don't you use 'C states' for the afforementioned ? > Throttling reduces CPU performance. I thought it would be better to > use C1,C2,C3, states. Or does fbsd ACPI not support C states yet ? It's supported them since 5.2 a year and a half ago, including static _CST support. This is equivalent to Linux. Also, support is automatic so he doesn't need to configure them. -- Nate
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