Cannot change cpu frequency

[kevinpita]

I'm trying to OC my rpi 4b and I can't the max frequency it achieves is 1.5 GHz, it's the max set by the system, I'm trying to put it to 2GHz, but my changes on /boot/config.txt don't make effect, I have changed the #arm_frewq=700 to

over_voltage=6 arm_freq=2000 gpu_freq=750

without any effect (Of course, I did reboot)

[popcornmix]

Can you report output of

vcgencmd version
uname -a
vcgencmd get_config int

[kevinpita]

@popcornmix

Jan 7 2021 18:27:29

Copyright (c) 2012 Broadcom

version fb345a0c2d5544957f4ba1a2b9e968970e3312c4 (clean) (release) (start)

-- Linux raspberrypi 5.10.5-v8+ #1391 SMP PREEMPT Thu Jan 7 17:55:54 GMT 2021 aarch64 GNU/Linux

-- arm_64bit=1 arm_freq=2000 audio_pwm_mode=514 config_hdmi_boost=5 disable_commandline_tags=2 disable_l2cache=1 display_hdmi_rotate=-1 display_lcd_rotate=-1 enable_gic=1 enable_uart=1 force_eeprom_read=1 force_pwm_open=1 framebuffer_ignore_alpha=1 framebuffer_swap=1 gpu_freq=750 gpu_freq_min=250 init_uart_clock=0x2dc6c00 lcd_framerate=60 mask_gpu_interrupt0=1024 mask_gpu_interrupt1=0x10000 max_framebuffers=2 over_voltage=6 over_voltage_avs=-10000 pause_burst_frames=1 program_serial_random=1 total_mem=8192 hdmi_force_cec_address:0=65535 hdmi_force_cec_address:1=65535 hdmi_pixel_freq_limit:0=0x11e1a300 hdmi_pixel_freq_limit:1=0x11e1a300

[popcornmix]

Seems to b e working for me. I have:

arm_64bit=1
arm_freq=2000
gpu_freq=750
over_voltage=6

and:

pi@pi4:~ $ echo performance | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
performance
pi@pi4:~ $ vcgencmd measure_clock arm
frequency(48)=2000478464
pi@pi4:~ $ echo powersave | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
powersave
pi@pi4:~ $ vcgencmd measure_clock arm
frequency(48)=600117184
pi@pi4:~ $ echo ondemand | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
ondemand
pi@pi4:~ $ vcgencmd measure_clock arm
frequency(48)=1400308608

When using ondemand governor the arm frequency varies between 600MHz and 2000MHz according to load. Can you explain exactly how this is not working for you?

[kevinpita]

@popcornmix

pi@raspberrypi:~ $ echo performance | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
performance
pi@raspberrypi:~ $ vcgencmd measure_clock arm
frequency(48)=1500345728

[pelwell]

To rule something out, how about vcgencmd get_throttled?

[kevinpita]

@pelwell throttled=0x0

[popcornmix]

Were you getting 600 or 1500 with powersave governor? What about:

pi@pi4:~ $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
600000 700000 800000 900000 1000000 1100000 1200000 1300000 1400000 1500000 1600000 1700000 1800000 1900000 2000000 

[kevinpita]

@popcornmix

1500

same output as you

[popcornmix]

If you have a spare sdcard it might be worth checking if you have the same issue on a fresh install of RPiOS. That would identify if some setting on the sdcard is restricting it (but I can't immediately think what).