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by ejolson
Sat Apr 10, 2021 3:09 am
Forum: Troubleshooting
Topic: More on wifi scanning
Replies: 5
Views: 1907

Re: More on wifi scanning

I had similar problems, and eventually tracked down three independent sources for the WiFi scans: lxpanels dhcpcd-ui (app level), wpa-supplicant (mid-level), and the Broadcom driver (low level). lxpanels dhcpcd-ui applet: lxpanels dhcpcd-ui, when WiFi is associated, by default automatically perform...
by spanda
Wed Apr 07, 2021 3:21 pm
Forum: Advanced users
Topic: DVFS Firmware
Replies: 98
Views: 20620

Re: DVFS Firmware

I have the latest firmware on my Raspberry Pi 4 Model B Given below is the output from vcgencmd. pi@raspberrypi:~ $ vcgencmd version Mar 26 2021 16:34:17 Copyright (c) 2012 Broadcom version edf2e9c318863999c97c50cdb74eee235ede3af5 (clean) (release) (start_x) I ran a test with the following python co...
by bmcahill
Sat Apr 03, 2021 3:33 am
Forum: Troubleshooting
Topic: More on wifi scanning
Replies: 5
Views: 1907

Re: More on wifi scanning

I had similar problems, and eventually tracked down three independent sources for the WiFi scans: lxpanels dhcpcd-ui (app level), wpa-supplicant (mid-level), and the Broadcom driver (low level). lxpanels dhcpcd-ui applet: lxpanels dhcpcd-ui, when WiFi is associated, by default automatically performs...
by akhilleusuggo
Sat Mar 13, 2021 11:53 am
Forum: Troubleshooting
Topic: Not able to overclock properly
Replies: 2
Views: 142

Re: Not able to overclock properly

Seems like you're right . Running measure_clock arm does give the right results . But it's confusing . ~ $ vcgencmd measure_clock arm frequency(48)=2100515584 Running scaling_cur_freq does give the "wrong" clock speed . ~ $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq 2200000 ...
by jahboater
Sat Mar 13, 2021 9:48 am
Forum: Troubleshooting
Topic: Not able to overclock properly
Replies: 2
Views: 142

Re: Not able to overclock properly

With simply:

Code: Select all

over_voltage=6
arm_freq=2100
I get this under load (note the two different measures):

Code: Select all

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
2100000
$ vcgencmd measure_clock arm
frequency(48)=2100515584
Have you got cpufrequtils installed?
by akhilleusuggo
Sat Mar 13, 2021 9:39 am
Forum: Troubleshooting
Topic: Not able to overclock properly
Replies: 2
Views: 142

Not able to overclock properly

Hello :) I've overclocked the CPU from the config file ( /boot/config.txt ) Parameters ; #arm_64bit=1 gpu_mem=256 over_voltage=6 arm_freq=2100 gpu_freq=700 But the clock speed of the CPU is not 2100 , but 2200 . ~ $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq 2200000 The CPU temperatur...
by CalvoUTN
Wed Mar 10, 2021 3:23 am
Forum: General discussion
Topic: RasPi 4b not going over 1.5GHz with overlock
Replies: 15
Views: 842

RasPi 4b not going over 1.5GHz with overlock

So I have a Raspberry Pi 4b 4GB. I modified the /boot/config.txt file and added the following: over_voltage=6 arm_freq=2000 gpu_freq=750 Everything seems to be working OK. Today I installed Plex and wanted to monitor the ARM freq and temps while watching a movie, and I saw in RPi-Monitor a max. freq...
by younseok
Mon Feb 01, 2021 12:38 am
Forum: Advanced users
Topic: opencv performance on buildroot and raspbian
Replies: 0
Views: 103

opencv performance on buildroot and raspbian

First of all, forgive me for not being good at English. I worked on a project using opencv and camera. And due to the boot speed of Raspbian, the boot speed was improved by building the kernel using buildroot. But my binary files run much slower in buildroot. I don't understand why this speed differ...
by glantucan
Fri Jan 15, 2021 7:25 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI interface and 8x8 RGB Led Matrix
Replies: 9
Views: 712

Re: SPI interface and 8x8 RGB Led Matrix

I finally built the module listed below. Is much less code that it seems. I added a lot of comments, mainly for myself because it took me a lot of time to get what needs to be done for this to work and I didn't want to have to rethink it again ;P. I also hope they help you understand what is going o...
by HermannSW
Mon Nov 30, 2020 4:50 pm
Forum: Advanced users
Topic: Pi0 camera video to Pi400 over GPIO
Replies: 67
Views: 4162

Re: Q on powering Pi0 from Pi400 GPIO

No idea why only slightly more than 30k clock state transitions were detected -- should be 131072 ... (see screenshot for the measured values) The reason was simple -- not only the Pi0W as sender has the spaces seen on logic analyzer. These spaces happen when Pi0W handles some interrupts. But the P...
by cleverca22
Fri Nov 27, 2020 9:15 am
Forum: Compute Module
Topic: CM3+ vcgencmd get_throttled and temperature limits
Replies: 12
Views: 323

Re: CM3+ vcgencmd get_throttled and temperature limits

it sounds like cpuinfo_cur_freq is the freq linux thinks its at, and what it told the firmware to run at but when throttling, the firmware decides to do something else, and not tell anybody "measure_clock arm" is likely going via the CM_TCNTCTL peripheral, and measures the actual clock, ra...
by gwerder.swissphone
Fri Nov 27, 2020 9:08 am
Forum: Compute Module
Topic: CM3+ vcgencmd get_throttled and temperature limits
Replies: 12
Views: 323

Re: CM3+ vcgencmd get_throttled and temperature limits

Hi there, It's me again. I made some further investigations and saw, that cpu frequency read from /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_cur_freq does not represent the actual arm-cpu frequency. To get the accurate arm-core frequency, only the vcgencmd measure_clock arm gives the correct fr...
by graysky
Thu Nov 26, 2020 1:08 am
Forum: Advanced users
Topic: Which kernel config option(s) are needed for temp sensors and CPU governors
Replies: 1
Views: 124

Which kernel config option(s) are needed for temp sensors and CPU governors

I am building the rpi-5.10.y branch for aarch64. My initially build lacks the core temp sensor and the ability to set CPU governors. If I use the manjaro config in my build, I get a resulting kernel that has both of these. What options are needed to enable them? When I diff the two configs, there ar...
by gwerder.swissphone
Tue Nov 24, 2020 2:23 pm
Forum: Compute Module
Topic: CM3+ vcgencmd get_throttled and temperature limits
Replies: 12
Views: 323

CM3+ vcgencmd get_throttled and temperature limits

Hi there, I am developing a commercial product based on the Compute Module 3+ 8GB. Currently, I'm investigating the temperature and frequency behavior and I check the ARM-state with vcgencmd get_throttled . How do the get_throttled values apply to the Compute Module 3+? My observations are at 55°C e...
by MRU42
Sat Oct 03, 2020 2:12 pm
Forum: Advanced users
Topic: cpuinfo_cur_freq don’t show the real value
Replies: 0
Views: 94

cpuinfo_cur_freq don’t show the real value

Hello to the community! I've seen an ¿error? that I have not been able to find the reason (and i searched a lot). I have a RPI-4 (with official charger) with overclock: arm_freq=2001 over_voltage=6 Everything is fine, but... when I stress the CPU I don't get the correct reading: vcgencmd measure_clo...
by Schorschi
Thu Jun 25, 2020 4:43 am
Forum: General discussion
Topic: Odd result from node.js os module for processor speed?
Replies: 1
Views: 197

Odd result from node.js os module for processor speed?

I have been trying to resolve why the node.js os module returns what appears to be half of the maximum processor speed. For example on a raspberry pi 4, the maximum processor speed is 1500, but as noted the os module reports only 750. I know for a fact this is not the current frequency which is 600:...
by aturfer
Sat Jun 06, 2020 11:44 pm
Forum: Ubuntu
Topic: [ubuntu] Getting CPU tempature on Ubuntu
Replies: 18
Views: 32387

Re: Getting CPU tempature on Ubuntu

mallets wrote:
Thu Sep 19, 2019 4:02 am
I'm still searching for the CPU freq value though.

Current CPU frequency:

Code: Select all

echo ">> CPU Freq:" $(($(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)/1000))MHz

To get min/max CPU frequency range:

Code: Select all

lscpu | grep -i mhz
by pik33
Mon May 25, 2020 4:24 pm
Forum: Troubleshooting
Topic: CPU Freq applet shows incorrect frequency when OC RPi4
Replies: 0
Views: 180

CPU Freq applet shows incorrect frequency when OC RPi4

I tried to extremally overclocking RPi4. I set it to 2100 MHz with 750 MHz GPU

Then the frequency applet (in the taskbar) shows 2294 MHz while vcgencmd shows correctly 2100 MHz

My own program which reads from '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq' also shows 2294 MHz.
by zibi
Sun May 17, 2020 11:20 am
Forum: Ubuntu
Topic: Raspberry pi 4 CPU idle frequency at max (1500 MHz) on Ubuntu Server 20.04 LTS with scaling_governor set to "ondemand"
Replies: 2
Views: 2348

Raspberry pi 4 CPU idle frequency at max (1500 MHz) on Ubuntu Server 20.04 LTS with scaling_governor set to "ondemand"

Hey! I couldn't find a post relating to my problem / observation, so I decided to finally register to the forum and post it myself. Hope it's in right place! I recently installed 64-bit version of Ubuntu Server 20.04 LTS on my one week old Raspberry Pi 4B (4Gb) using the Raspberry Pi Imager-software...
by Jamescoop
Wed Feb 26, 2020 5:01 pm
Forum: Troubleshooting
Topic: RPi Zero W only running at 700MHz
Replies: 17
Views: 1000

Re: RPi Zero W only running at 700MHz

Thank you for the links. Looks like I am mistaken. According to running cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq it is requesting 1000MHz and vcgencmd measure_clock arm 1000MHz as well How come in config.txt then the arm_freq=800 as overclock setting? shouldnt it be like 1050? Opene...
by lanbrown
Mon Feb 17, 2020 1:42 am
Forum: Advanced users
Topic: Cant Overclock?
Replies: 27
Views: 5319

Re: Cant Overclock?

First time poster, short term member. I have three Raspberry 4B's and none of them seem to allow overclock; they still boot but the clock speed still shows 1500. It isn't a temp issue as one was at 42 celsius and still would stay at 1500. vcgencmd get_config arm_freq arm_freq=1500 uname -a Linux 4.1...
by Gatley
Thu Jan 23, 2020 4:23 pm
Forum: Beginners
Topic: [Solved]Unable to resize external SSD partition
Replies: 34
Views: 1872

Re: Unable to resize external SSD partition

It looks a bit daunting, I see this partition mentioned in several places, this is the contents of my raspi-config file: #!/bin/sh # Part of raspi-config https://github.com/RPi-Distro/raspi-config # # See LICENSE file for copyright and license details INTERACTIVE=True ASK_TO_REBOOT=0 BLACKLIST=/etc/...
by sachinkhanna342
Mon Dec 09, 2019 8:47 am
Forum: General discussion
Topic: rpi 4b question
Replies: 0
Views: 172

rpi 4b question

Hi, I have the following and wonder if this is right or wrong?

dsettles@raspberrypi:~ $ sudo vcgencmd measure_volts core
[sudo] password for dsettles:
volt=0.8625V
dsettles@raspberrypi:/boot $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
600000


Sachin Khanna
by dts2019
Mon Dec 02, 2019 1:45 pm
Forum: General discussion
Topic: rpi 4b question
Replies: 1
Views: 194

rpi 4b question

Hi, I have the following and wonder if this is right or wrong?

dsettles@raspberrypi:~ $ sudo vcgencmd measure_volts core
[sudo] password for dsettles:
volt=0.8625V
dsettles@raspberrypi:/boot $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
600000
by soundcheck
Thu Nov 21, 2019 11:26 am
Forum: Advanced users
Topic: RPi4 - Power Savings
Replies: 65
Views: 30458

Re: RPi4 - Power Savings

Let's go on a little. I looked at the CPU governors. I guess I do not have to explain what these are for. Just some words. Each of the 6 governors offers a different CPU frequency scheme. The right choice of the scheme depends on the working conditions each user is running. The default frequency ran...

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