Date: Fri, 18 Jul 2003 08:07:56 -0700 From: "Kevin Oberman" <oberman@es.net> To: Tobias Roth <roth@iam.unibe.ch> Cc: mobile@freebsd.org Subject: Re: dmesg showing wrong frequency (IBM T30) Message-ID: <20030718150756.2D3D25D08@ptavv.es.net> In-Reply-To: Message from Tobias Roth <roth@iam.unibe.ch> <20030718141239.GB19817@speedy.unibe.ch>
next in thread | previous in thread | raw e-mail | index | archive | help
> Date: Fri, 18 Jul 2003 16:12:39 +0200 > From: Tobias Roth <roth@iam.unibe.ch> > Sender: owner-freebsd-mobile@freebsd.org > > Hi > > On my IBM T30 1.8GHz, dmesg (with both 4.8 and 5.1) shows me this line: > > CPU: Intel(R) Pentium(R) 4 Mobile CPU 1.8GHz (1196.13-MHz 686-class CPU) > > Various windows utilities also claim that the cpu identification string > marks my cpu as 1.8 GHz unit, while the maximum frequency always gets > detected as something just below 1.2GHz. > > What is wrong here? To other IBM T30 users: Is your CPU identification > correct? Were you on AC or battery when you booted? It seems that the T30 (and many other laptops from multiple vendors) does not change the CPU speed when APM/ACPI from FreeBSD tells it to. If I boot on battery, my system stays at 1.2 GHz and if I boot on AC power, the system runs 1.8 GHz. Changes to the power source made after it is up seem to have no effect. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030718150756.2D3D25D08>