On Sat, 2010-04-10 at 23:50 +0200, Bernhard Kuemel wrote: > Package: linux-2.6 > Version: 2.6.32-11 > Severity: normal > > > I use a intel core 2 duo E4400 CPU at stock 2 GHz. /proc/cpuinfo > claims its frequency is 1000 MHz. cpufreq-info says its hardware > limit is 1000 MHz. During boot the kernel says: > [ 0.000000] Detected 1999.951 MHz processor. > [ 0.076234] CPU0: Intel(R) Core(TM)2 Duo CPU E4400 @ 2.00GHz stepping > 0d > [ 0.164090] CPU1: Intel(R) Core(TM)2 Duo CPU E4400 @ 2.00GHz stepping > 0d > > I'm not sure wether my CPU is running at 1 or 2 GHz. > > This all happens while I run s...@home on both cores so the ondemand > governor, speedstep or whatever should switch to maximum frequency. > Indeed, ondemand switches to what it thinks is the maximum frequency. > Using the performance governor didn't help. [...] > --------------------- cpufreq-info --------------------------- > bernh...@be:/data/home/bernhard$ cpufreq-info > cpufrequtils 006: cpufreq-info (C) Dominik Brodowski 2004-2009 > Report errors and bugs to cpuf...@vger.kernel.org, please. > analyzing CPU 0: > driver: acpi-cpufreq > CPUs which run at the same hardware frequency: 0 > CPUs which need to have their frequency coordinated by software: 0 > maximum transition latency: 160 us. > hardware limits: 600 MHz - 1000 MHz > available frequency steps: 1000 MHz, 800 MHz, 600 MHz [...]
Note that the driver is acpi-cpufreq - this means it is dependent on the BIOS. Please check whether there is a BIOS update available for this system. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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