disable systemd service in yocto?

in file meta-xxx/recipes-core/systemd/systemd_%.bbappend

do_configure_append() {

  #disabling autostart of systemd-timesyncd      sed -i -e "s/enable systemd-timesyncd.service/disable systemd-timesyncd.service/g" ${S}/presets/90-systemd.preset    #disabling autostart of systemd-resolved      sed -i -e "s/enable systemd-resolved.service/disable systemd-resolved.service/g" ${S}/presets/90-systemd.preset  }

userspace 에서의 led class 를 이용하는 방법으로, /dev/uleds 열어서 핸들을 얻어온후.

그 핸들을 이용해서 시스템에 등록된 모든 led 기능을 사용한다.

커널 디바이스 드라이버 --> LED --> userspace led 선택.

https://www.kernel.org/doc/html/latest/leds/uleds.html

리눅스 노트북 빌드가 느릴때 확인사항.

sudo add-apt-repository ppa:linrunner/tlp  sudo apt update

sudo apt install tlp tlp-rdw

sudo apt install acpi-call-dkms

sudo apt install auto-cpufreq

cpufreq

watch 'grep "cpu MHz" /proc/cpuinfo'

Errno=No space left on device (ENOSPC) 해결법

sudo sysctl fs.inotify.max_user_watches=1000000

sudo vi /etc/sysctl.d/99-custom.conf

fs.inotify.max_user_watches=1000000 라고 써