https://bugzilla.kernel.org/show_bug.cgi?id=17001 Summary: ondemand governor non-functional / ACPI P-states driver Product: Power Management Version: 2.5 Kernel Version: 2.6.35.3 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: cpufreq AssignedTo: cpufreq@xxxxxxxxxxxxxxx ReportedBy: peter.ganzhorn@xxxxxxxxxxxxxx Regression: No Hardware: Toshiba Tecra A9 notebook Intel Core2 Duo T7300 2.0 GHz processor Software: Debian testing "Squeeze" Kernel 2.6.35.3 Bug description: With the cpufreq-ondemand governor enabled, the CPU frequency does not increase at all with any workload. Even with both cores running at 100% load the CPU frequency will never increase above the minimum frequency of 800MHz. Using the performance governor makes the CPU switch to 2GHz immediately. Running on battery or AC power does not have any effect on this issue. I am using the exact same software configuration (same distro, kernel .config is identical except for different NIC drivers) on a workstation computer with an Intel Core2 Quad Q9550, the workstation is not affected by the issue (CPU frequency is changed when load situation changes almost instantaneously to a frequency fitting the current load situation). Here's some sysfs info about the cpufreq configuration (looks fine to me): centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./cpuinfo_max_freq 2001000 centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./cpuinfo_min_freq 800000 centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./scaling_max_freq 2001000 centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./scaling_min_freq 800000 centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./scaling_setspeed <unsupported> centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./scaling_governor performance centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./scaling_driver acpi-cpufreq centauri:/sys/devices/system/cpu/cpu0/cpufreq# cat ./scaling_available_frequencies 2001000 2000000 1600000 1200000 800000 Please tell me what other information I need to submit to you. As far as I can tell, the problem exists at least since kernel version 2.6.30, I did not test any earlier versions. Debian distribution stock kernel is affected from the issue as well. Thanks for looking into this issue. best regards, Peter Ganzhorn -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
