Short version :) try do this cd /sys/devices/system/cpu/cpu0/cpufreq sudo cat ondemand/sampling_rate_max > ondemand/sampling_rate
Long version. http://www.bughost.org/pipermail/power/2007-September/000965.html "It's probably because a shell script somewhere, sometime, asked the kernel to do something that involves polling. A likely culprit would be if you're using the ondemand frequency governor on a 2.6.22 kernel. This is enabled by echo'ing a value into a sysfs file, and echo is a shell builtin so the sh binary gets blamed. The ondemand governor has been fixed in recent 2.6.23-rc versions." http://www.lesswatts.org/projects/powertop/known.php The kernels ondemand CPU frequency management function currently has a high-frequency timer that samples to see if the CPU is idle. Intel fixed this and the patches to the kernel to effectively remove this timer are included in Linus' tree as of 2.6.22-rc1. However, if you don't want to rebase to that kernel, you can also reduce the frequency of this timer from a command prompt with the following command: cd /sys/devices/system/cpu/cpu0/cpufreq cat ondemand/sampling_rate_max > ondemand/sampling_rate -- laptop_mode waking up the CPU. https://bugs.launchpad.net/bugs/163517 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
