i.MX ProcessorsのトピックRe: stop / hide unwanted messages in iMX8

stop / hide unwanted messages in iMX8

msingh1920 — Tue, 18 Feb 2020 10:09:03 GMT

Hi Sir,

I have iMX8M Mini EVK and I am able to run AOSP 9.0 on it.

But after booting when I connect debug port to my laptop and open it using putty then I see lots of unwanted messages
These messages always keeps coming at frequent interval.

It become very annoying while debugging. I want to stop/hide these message but not sure hot to do that.

below is the common message which keep coming -

[11111.056000] healthd: battery l=85 v=3 t=35.0 h=2 st=2 c=400 fc=4000000 cc=32 chg=a
[11170.765718] healthd: battery l=85 v=3 t=35.0 h=2 st=2 c=400 fc=4000000 cc=32 chg=a
[11171.056032] healthd: battery l=85 v=3 t=35.0 h=2 st=2 c=400 fc=4000000 cc=32 chg=a
[11230.765728] healthd: battery l=85 v=3 t=35.0 h=2 st=2 c=400 fc=4000000 cc=32 chg=a
[11231.056056] healthd: battery l=85 v=3 t=35.0 h=2 st=2 c=400 fc=4000000 cc=32 chg=a

Is there any way i can hide or stop these messages ?

Thanks,

Maneesh

Re: stop / hide unwanted messages in iMX8

b36401 — Wed, 19 Feb 2020 07:55:16 GMT

As first (easiest) option you can use "dmesg -D" to disable printing messages to console, later you can use "dmesg -E" to enable them back if required.
Also you can tune log level with "dmesg -l"

Re: stop / hide unwanted messages in iMX8

msingh1920 — Wed, 19 Feb 2020 10:32:39 GMT

Hi Victor,

Thanks for your reply.

But on iMX8M mini EVK when I booted AOSP 9.0 and when I checked dmesg --help options

there is no -D or -E flags available.

Also If I try to do sudo or su then it give permission denied or invalid error msg.

Please check the logs which I collected after booting iMX8M Mini EVK ->

NOTE : - I am using iMX8M Mini EVK and running Android AOSP 9.0 provided by NXP

evk_8mm:/ $
evk_8mm:/ $
evk_8mm:/ $ dmesg --help
usage: dmesg [-Cc] [-r|-t|-T] [-n LEVEL] [-s SIZE] [-w]

Print or control the kernel ring buffer.

-C      Clear ring buffer without printing
-c      Clear ring buffer after printing
-n      Set kernel logging LEVEL (1-9)
-r      Raw output (with <level markers>)
-S      Use syslog(2) rather than /dev/kmsg
-s      Show the last SIZE many bytes
-T      Show human-readable timestamps
-t      Don't print timestamps
-w      Keep waiting for more output (aka --follow)

evk_8mm:/ $

[ 131.759090] healthd: battery l=85 v=3 t=35.0 h=2 st=2 c=400 fc=4000000 cc=32 chg=a
[ 132.050218] healthd: battery l=85 v=3 t=35.0 h=2 st=2 c=400 fc=4000000 cc=32 chg=a

Thanks,

Maneesh

Re: stop / hide unwanted messages in iMX8

b36401 — Thu, 20 Feb 2020 03:51:11 GMT

Please try to play with logging level. I mean "-n" option.

Re: stop / hide unwanted messages in iMX8

msingh1920 — Thu, 20 Feb 2020 14:15:34 GMT

Hi Victor Linnik,

Thanks for your suggestions.

It solved my problem.

I did -

evk_8mm:/ $ su

evk_8mm:/ $

evk_8mm:/ $ dmesg -n 1

evk_8mm:/ $

And now I am not receiving any debug messages.

Thanks,

Maneesh

Re: stop / hide unwanted messages in iMX8

msingh1920 — Thu, 20 Feb 2020 14:30:49 GMT

Hi Victor Linnik,

I am facing some issue during AOSP OTA and I have already asked this question in this forum

Below is the Link -

AOSP 9.0 OTA update for iMX8M Mini

If you can provide any solutions or suggestion then it will be of great help.

Thanks,

Maneesh