Cpu_freq not working?

6 2976

cpufrequtils fails to set the cpu frequency in my clean installation of bananian 15.01

dmesg shows
  1. [    7.977001] deviceless supply Vcore not found, using dummy regulator
  2. [    7.987472] dummy: Failed to create debugfs directory
  3. [    7.998528] [cpu_freq] INF:-------------------V-F Table-------------------
  4. [    8.010509] [cpu_freq] INF:  voltage = 1450mv        frequency = 1008MHz
  5. [    8.021702] [cpu_freq] INF:  voltage = 1425mv        frequency =  912MHz
  6. [    8.032909] [cpu_freq] INF:  voltage = 1350mv        frequency =  864MHz
  7. [    8.044102] [cpu_freq] INF:  voltage = 1250mv        frequency =  720MHz
  8. [    8.055303] [cpu_freq] INF:  voltage = 1150mv        frequency =  528MHz
  9. [    8.066513] [cpu_freq] INF:  voltage = 1100mv        frequency =  312MHz
  10. [    8.077711] [cpu_freq] INF:  voltage = 1050mv        frequency =  144MHz
  11. [    8.088903] [cpu_freq] INF:  voltage = 1000mv        frequency =    0MHz
  12. [    8.100871] [cpu_freq] INF:-----------------------------------------------
  13. [    8.117543] [cpu_freq] INF:sunxi_cpufreq_initcall, get cpu frequency from sys                             config, max freq: 912MHz, min freq: 720MHz
Copy the Code
and later
  1. [cpu_freq] ERR:try to set voltage failed!
Copy the Code
cpufreq-info says that the current CPU frequency is 384 MHz for both cores.

What could be the problem?
Which board?

I'm using the normal Banana PI.
Could it be a problem with the driver?
lsmod gives me:
  1. root@bananapi ~ #  lsmod |grep cpu
  2. cpufreq_stats           5908  0
  3. cpufreq_userspace       3524  0
  4. cpufreq_conservative     5712  0
  5. cpufreq_powersave       1242  0
Copy the Code
Thanks in advance for your help!

I have the same problem.
Today I restart my Banana Pro and inside syslog there is many mesages like this:
  1. [cpu_freq] ERR:try to set voltage failed!
Copy the Code
I have Bananian v15.01 with all distribution updates.
Is somebody who can help?

Edited by stelmik at Mon Mar 2, 2015 17:06

When I restarted Banana with command:
  1. shutdown -r 0
Copy the Code
the problem exists all the time.

I tried to shutdown Banana with command:
  1. shutdown -h 0
Copy the Code
then disconnect power cable and connect it again to boot system.
Now error message not exists. CPU Frequency: 600 MHz - 1.0 GHz (correct).

Shutdown or reboot did not help for me.

I think there is a problem with the kernel. This Debian Wheezy image based on Kernel 3.19.0 works as expected without error messages.

Edited by simomat at Thu Mar 12, 2015 02:17

I have the same issue. This message spams my logs:
  1. [cpu_freq] ERR:try to set voltage failed!
Copy the Code
It started a while ago when I upgraded the kernel. I compiled the kernel as described in the manual (wiki) with default configuration. So now I have that one:
  1. Linux lemaker 3.4.103+ #1 SMP PREEMPT Sat Jan 31 08:47:44 CET 2015 armv7l armv7l armv7l GNU/Linux
Copy the Code
on lubuntu with normal banana pi (not pro).

Shutting down the system or remove power cable doesn't solve the problem.

You have to log in before you can reply Login | Sign Up

Points Rules