06-19-2021, 09:38 AM
(This post was last modified: 06-19-2021, 09:43 AM by jrobin28260.)
By doing some more tests, I found out what the issue is: the CPU is struggling to change its frequency when the LTE connection is used!
Using governor "performance" is also fixing the CPU frequency (unless the temperature is too high, above 60°C the frequency start changing all the time). By using a fan (maintaining the CPU temperature under 50°C), "performance" governor (CPU frequency fixed to 1152 MHz) and "bwm-ng" actualizing every 0.1 seconds on the screen, I had no freeze while using LTE modem.
But I unplugged the fan, and as soon as the CPU frequency starts moving (when temperature reaches 60°C), freezes appears in performance mode too.
Using "ondemand" CPU governor, the CPU frequency is switching all the time, so that using the LTE modem is almost always causing troubles.
EDIT : it implies a new question
What can cause the CPU to struggle changing its frequency while LTE connection is used? Radio frequencies interferences? USB data exchange with the SoC? Power fluctuations?
Using governor "performance" is also fixing the CPU frequency (unless the temperature is too high, above 60°C the frequency start changing all the time). By using a fan (maintaining the CPU temperature under 50°C), "performance" governor (CPU frequency fixed to 1152 MHz) and "bwm-ng" actualizing every 0.1 seconds on the screen, I had no freeze while using LTE modem.
But I unplugged the fan, and as soon as the CPU frequency starts moving (when temperature reaches 60°C), freezes appears in performance mode too.
Using "ondemand" CPU governor, the CPU frequency is switching all the time, so that using the LTE modem is almost always causing troubles.
EDIT : it implies a new question
What can cause the CPU to struggle changing its frequency while LTE connection is used? Radio frequencies interferences? USB data exchange with the SoC? Power fluctuations?
