Overclock Not Working

[0xDECAFBAD]

I have arm_freq=1000 and force_turbo=1 in config.txt but when I run /opt/vc/bin/vcgencmd measure_clock arm it still shows 700mhz. Even when I used raspi_config and set it to the automatic turbo overclocking mode and I was opening multiple browser windows at a time, maxing out the cpu, /opt/vc/bin/vcgencmd measure_clock arm still showed 700mhz. This is a brand new 512mb Pi with Raspbian that I set up yesterday. Anyone know whats going on?

[ChadP]

Im having the same problem. I used raspi config to set mine to turbo but when i check it it shows 695. When i check the config file all the overclock settings are in the config file like they should be.

[RaTTuS]

put the system under load then check

[dknute]

This is a Raspbian issue I think. It's supposed to be using "ondemand" power governor but instead sticks to "powersave". Maybe it's enabled if you select the overclock option in the config menu but I never did that, I wanted to try out my own settings so I just added new entries to config.txt.

Anyway, try adding this line to /etc/rc.local, at the end is good but before "exit 0":

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echo "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

With this and enough system load you should see the clock rise. To see your current setup just run cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor.

[Dilligaf]

In the original post he states force_turbo=1 this should disable dynamic overclock and run at 1000 all the time, governor should have no effect. Is this not the case, or am I mistaken?

[dknute]

Uh, truth be told I'm not quite sure how force_turbo=1 works exactly. I was under the impression that clocks are still at default settings during boot and only after that forced to config values. If that's the case then maybe some other setting prevents that?

However, 0xDECAFBAD also had problems with the dynamic overclocking and that is exactly what I experienced - so I suggested a solution that worked for me. Sorry if I caused a confusion.

[dom]

I have arm_freq=1000 and force_turbo=1 in config.txt but when I run /opt/vc/bin/vcgencmd measure_clock arm it still shows 700mhz. Even when I used raspi_config and set it to the automatic turbo overclocking mode and I was opening multiple browser windows at a time, maxing out the cpu, /opt/vc/bin/vcgencmd measure_clock arm still showed 700mhz. This is a brand new 512mb Pi with Raspbian that I set up yesterday. Anyone know whats going on?

What does

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vcgencmd get_cconfig int

and

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dmesg |grep cpu | grep max

return?