I'm posting here because pstate is giving me problems as well, but in the opposite direction. Upon bootup and for several hours thereafter, scaling works correctly. But after a period of time something happens (which is of course not mentioned in any log) and scaling_max_freq is set to scaling_min_freq and cannot be changed at all.
root@ossy:/etc# cd /sys/devices/system/cpu/cpu0/cpufreq root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# ls affected_cpus cpuinfo_transition_latency scaling_driver scaling_setspeed cpuinfo_cur_freq related_cpus scaling_governor cpuinfo_max_freq scaling_available_governors scaling_max_freq cpuinfo_min_freq scaling_cur_freq scaling_min_freq root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_max_freq 1600000 root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# cat cpuinfo_max_freq 3700000 root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# cat cpuinfo_max_freq > scaling_max_freq root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_max_freq 1600000 root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# echo performance > scaling_governor root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_governor performance root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# cat cpuinfo_max_freq > scaling_max_freq root@ossy:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_max_freq 1600000 This happens whether or not I have Enhanced SpeedStep enabled in my BIOS. (This is also not a BIOS limit problem.) Disabling pstate entirely allows me to run at 3.3GHz all the time. Since powerclamp is loaded and thermald is running I'm still protected from overheating situations. Since this is a desktop I don't really care about the power usage but I can see where this would be a bigger problem for laptops. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1188647 Title: Please change intel_pstate default to disable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
