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Yes, probably because it is not a module, it is built in. There are no error messages but modinfo returns I however cannot load acpi-cpufreq with modprobe. $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

$ echo -n 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq I tried setting scaling_max_freq manually without effect How can I obtain the correct frequencies and set them without risking to damage the notebook (boosting only short periods of time)? $ cat /sys/devices/system/cpu/cpufreq/boost My remaining problem is that now the processor scales up at most to 1.0 GHz not to the 1.6 as in the specs (or 2GHz shown in the Gnome extension) $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver Modinfo: ERROR: Module acpi-cpufreq not found.īut scaling driver seems to be working anyways. Without processor.ignore_ppc=1 the problem remained even using the acpi-cpufreq this works to a certain extend. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=disable processor.ignore_ppc=1" I then disabled intel pstate driver by modifying /etc/default/grub (and running update-grub) to: The bios is updated to the latest version. A similar behavior has been reported on the Lenovo forums under windows (although "Throttlestop" seems to help).

The CPU which is slow in general (800MHz, but okay with turbo boost indicated up to 2GHz peaks) falls into a powersaving mode (500MHz unable to work with) once the battery reaches 25% and remains there until reboot even when recharging. With 16.04 (Gnome flavor) everything installs and runs fine except for one issue. I own a Lenovo Yconvertible notebook with a core-m 5Y10c processor.