Trayfreq (pronounced trayfreek) is a GTK+ application released under GPL that lets you select your CPU's governor or frequency from a tray icon; therefore, trayfreq only depends on GTK+ and anything that can show tray icons.
CPU scaling requires you to have a kernel with the ability already built in or have an appropriate driver module loaded. If the former case represents you, then you do not have to worry. If the latter case represents you, follow the following steps:
Most modern computers use the module acpi-cpufreq. Other options include the p4-clockmod, powernow-k6, powernow-k7, powernow-k8, and speedstep-centrino drivers.
To load the driver, modprobe it:
# modprobe acpi-cpufreq
To load the driver automatically at start up, add the module to Template:Filename:
# MODULES=( ... acpi-cpufreq ... )
CPU Governors Setup
Some CPU governors may not be built into your kernel, and you can add them to Template:Filename to have them automatically load at start up. Again, edit Template:Filename to load the governors' drivers.
# MODULES=( ... cpufreq-powersave cpufreq-userspace cpufreq-ondemand ... )
Now, let's edit the configuration file for trayfreq.
# nano /usr/share/trayfreq/trayfreq.config
Everything will be commented out; uncomment what you want to use. Let's go through the options
- Template:Codeline – the group events
- Template:Codeline – this sets the program to launch when the tray icon is activated (left clicked usually)
- Template:Codeline – the group governor
- Template:Codeline – this sets the default governor to be set when trayfreq starts
- Template:Codeline – the group frequency
- Template:Codeline – this sets the default frequency in hertz to be set when trayfreq starts
Note that, if a default frequency is set, it will override the governor.
[events] activate=/usr/bin/showbatt [governor] default=ondemand #[frequency] #default=800000
If you want, you can have a configuration file in your home folder, but it can now set the program to run when the tray icon is activated too. The file should be Template:Filename; if it exists, trayfreq will not look at Template:Filename.
A desktop file is installed into /etc/xdg/autostart/. It will automatically start once installed. If you do not want it to start automatically, open the start up manager that comes with your desktop enviroment and uncheck trayfreq.