System is very slow after resume after echo mem > /sys/power/state

Which Khadas SBC do you use?


Which system do you use? Android, Ubuntu, OOWOW or others?

Arch Linux

Which version of system do you use? Khadas official images, self built images, or others?


Please describe your issue below:

System is very slow after resume after echo mem > /sys/power/state
Frequency of CPUs is max.
Dear friends, help me please by your ideas and opinions))

Post a console log of your issue below:

VIM3 ~ # cat /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_cur_freq
VIM3 ~ # cat /sys/devices/system/cpu/cpufreq/policy2/cpuinfo_cur_freq
VIM3 ~ # 

Does it act slow using Ubuntu 20.04 with 4.9 kernel? If it runs fine with Ubuntu OS it would be an issue with Arch.

I have tried Ubuntu with 5.14 kernel but it do not launched for me. Then I take the this 5.14 kernel from Khadas Ubuntu and launch Arch Linux with him. And this 5.14 kernel from Khadas after resume was very slow too. I think, what this problem in Kernel, not Arch, as I using kernel suspend mechanism. Is it possible what nobody supporting A311 chip on kernel level in the lasts kernels?
Or may be probably adjusting other clocks and frequencies for solve problem?

That is not a good thing to do, changing clock freq can create timing issues. Pretty sure they did testing to determine the optimum speed/reliability for the clock freq.