I used armbianmonitor -r on my OPi Zero just like I did previously on OPi One. On OPi One everything is working fine. On my zero it doesn't display all the information for CPU. It shows:

CPU total: undefined% (Sys: undefined%, User: undefined%, I/O wait: undefined%, Nice: undefined%)

CPU frequency: 1.008GHz  DRAM frequency: Not available

Governor: ondemand  Active CPU cores: 4  Vcore: undefined

 

If I run armbianmonitor -m it shows these data

 

I checked Allwinner_H3_Extended.conf and I noticed that it reads files from /tmp (/tmp/cpustat, /tmp/disktemp, e.t.c)

On my OPi One I see these files

 

On OPi Zero there is no rpimonitor folder. I only see these

armbian-hardware-optimization.OkJBzI
systemd-private-0b4c896481294542b7b1cd8e7a270133-chrony.service-SHnE1R
systemd-private-0b4c896481294542b7b1cd8e7a270133-haveged.service-qSLdic

 

What could be the issue? 

 

49 minutes ago, jonokoi said:

What could be the issue? 

You are having some strange mixture of packages and not running latest Armbian. That would be the first issue. Try latest clean image and if it's the same it becomes interesting.

I installed a clean image of Armbian 21.02.1 Buster with kernel 5.10.12-sunxi and I have the exact same behavior. What's the correct way to install armbianmonitor? I installed it with: "sudo armbianmonitor -r".

Then it must be kernel related problem. You can confirm that by switching kernel to latest legacy 5.4.y (via armbian-config -> system -> alternative kernels) and I think it should work there.

 

https://github.com/armbian/build/commits/master/packages/bsp/common/usr/bin/armbianmonitor

As you can see there were no relevant changes in this script while Linux kernel is changing daily by thousands of people. With relying on very little maintaining capacity it is extremely difficult / impossible to catch up. Bug is more or less on those who find it

I switched to 5.4.88 but still no luck with Orange Pi Zero.

The Orange Pi One I mentioned above that's working fine has Armbian 5.60 with 3.4.113. It's running without issues for years.