I can second this bug report. Summary: with "ondemand" on a fresh 9.10 installation on a Toshiba Tecra M9 both CPUs were stuck at 800MHz. The system felt very sluggish.
I have done a fresh install of 9.10 on a Toshiba Tecra M9. After the default installation "cpufrequtils" where missing. After installing that I put two CPU frequency scaling monitors into my panel. Both CPU cores where stuck at 800MHz all the time, no matter what load I put on the system. Setting the policy to "conservative" (instead of "ondemand") helped. Now when putting load on the system, both CPUs where scaling up to 2.2GHz correctly. When I found this bug report, I tweaked the "up_threshold" setting and then "ondemand" scaling is now working as well. echo "30" > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold echo "30" > /sys/devices/system/cpu/cpu1/cpufreq/ondemand/up_threshold So that means something is wrong with using "ondemand" on this system. Here are some system informations: Linux xxx 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:04:26 UTC 2009 i686 GNU/Linux Ubuntu 2.6.31-14.48-generic cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006 Report errors and bugs to [email protected], please. analyzing CPU 0: driver: acpi-cpufreq CPUs which need to switch frequency at the same time: 0 hardware limits: 800 MHz - 2.20 GHz available frequency steps: 2.20 GHz, 2.20 GHz, 1.60 GHz, 1.20 GHz, 800 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 800 MHz and 2.20 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 800 MHz. cpufreq stats: 2.20 GHz:0.00%, 2.20 GHz:0.00%, 1.60 GHz:0.00%, 1.20 GHz:0.00%, 800 MHz:0.00% (6208) analyzing CPU 1: driver: acpi-cpufreq CPUs which need to switch frequency at the same time: 1 hardware limits: 800 MHz - 2.20 GHz available frequency steps: 2.20 GHz, 2.20 GHz, 1.60 GHz, 1.20 GHz, 800 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 800 MHz and 2.20 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 800 MHz. cpufreq stats: 2.20 GHz:0.00%, 2.20 GHz:0.00%, 1.60 GHz:0.00%, 1.20 GHz:0.00%, 800 MHz:0.00% (5337) -- ondemand cpufreq governor broken on core 2 duo cpu https://bugs.launchpad.net/bugs/475706 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
