Public bug reported: Hi,
I have HP EliteBook 8440p with quadcore CPU, using Ubuntu 12.04 and Gnome-Shell 3 using two bateries. I noticed following: When batery comes under certain available power and/or when laptop is on power adapter and bateries are charging, until bateries are over 85% (not sure correct number), I can't change scaling_max_freq to maximum number. It stays on lowest possible freq and can't be changed. When bateries are over 85%, I can change this file. vi says : "E667: Fsync failed" when I try to save the chages. echo 2534000 > scaling_max_freq doesn't say anything, it just silently does nothing. I am using performance governor. This is my rc.local which I use to set frequencies and governour: echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor echo 2534000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq echo 2534000 > /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq echo 2534000 > /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq echo 2534000 > /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq And here is my /etc/sysfs.conf devices/system/cpu/cpu0/cpufreq/scaling_governor = performance devices/system/cpu/cpu1/cpufreq/scaling_governor = performance devices/system/cpu/cpu2/cpufreq/scaling_governor = performance devices/system/cpu/cpu3/cpufreq/scaling_governor = performance devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 2534000 devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 2534000 devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 2534000 devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 2534000 /etc/init.d/ondemand is disabled. I changed all this files, because I got performance problems (cpu on maximum when using firefox and laptop was draging). Then I noticed that I can set cpu (with indicator-cpufreq) to more then minimum freq, so I found out that my scaling_max_freq is also on lowest frequency. uname -a Linux 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:52:48 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Bug is similar to this bugs? https://bugs.launchpad.net/ubuntu/+source/linux/+bug/396432 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/242006 ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1050843 Title: scaling_max_freq always on lowest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050843/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
