I've got an m4v2 running current armbian (Armbian_19.11.4_Nanopim4_bionic_legacy_4.4.192_desktop.7z)

 

I get a stack of messages on tty1 and in dmesg stating "get wrong frequency".  it was also logging via syslog, but I have disabled those from logging.  it also seems to generate one of these messages every time I hit a key on the keyboard.  somehow related to kbd interrupt?

 

ondemand cpu freq scaling works,  running cpu intensive jobs, the following frequencies were observed

 

Jan 11 10:45:01 m4-2 root: CPUTEMP 45.00 (600.00/600.00)
Jan 11 21:50:01 m4-2 root: CPUTEMP 44.44 (1416.00/600.00)
Jan 11 21:55:01 m4-2 root: CPUTEMP 45.62 (1416.00/600.00)
Jan 11 22:00:02 m4-2 root: CPUTEMP 58.33 (1416.00/1800.00)
Jan 11 22:05:01 m4-2 root: CPUTEMP 47.50 (600.00/1800.00)
Jan 11 22:10:01 m4-2 root: CPUTEMP 46.25 (1416.00/600.00)
Jan 11 22:15:01 m4-2 root: CPUTEMP 60.62 (1416.00/1800.00)
Jan 11 22:20:01 m4-2 root: CPUTEMP 64.38 (1416.00/1800.00)
 

[    7.156821] rockchip-dmc dmc: Get wrong frequency, Request 528000000, Current 856000000
[    7.215030] rockchip-dmc dmc: Get wrong frequency, Request 528000000, Current 856000000
[    7.266670] rockchip-dmc dmc: Get wrong frequency, Request 800000000, Current 856000000
[    7.268762] rockchip-dmc dmc: Get wrong frequency, Request 528000000, Current 856000000
[    7.320885] rockchip-dmc dmc: Get wrong frequency, Request 528000000, Current 856000000
[    7.373161] rockchip-dmc dmc: Get wrong frequency, Request 400000000, Current 856000000
[    7.424889] rockchip-dmc dmc: Get wrong frequency, Request 400000000, Current 856000000
[  180.539062] rockchip-dmc dmc: Get wrong frequency, Request 800000000, Current 856000000
[  180.570767] rockchip-dmc dmc: Get wrong frequency, Request 800000000, Current 856000000
[  180.676165] rockchip-dmc dmc: Get wrong frequency, Request 800000000, Current 856000000
 

10 hours ago, justin.wills said:

I get a stack of messages on tty1 and in dmesg stating "get wrong frequency". 

These are messages from Dynamic Memory Controller.

FriendlyARM decided to delete some OPP points for it from device tree. Maybe it was causing some stability issues.

Should be harmless but it's a pity that it pollutes logs though.

i see.  that is a pity, as it makes text console almost useless, as well as dmesg output.

 

as a side note, if I run latest Friendly desktop, I don't get these.  I'll have a bit more of a dig about 

 

is there an easy way to recompile one of these dts files so I can test with "delete node" removed?  or I may checkout trying the one shipped with friendly desktop as a test

well, I spun up an ubuntu x86 image and built my own armbian image with desktop.  no more frequency messages :)

 

and it really wasn't that hard.  I only spent about 10 mins reading the "build" documentation

 

now to get the rest of it working to my liking.