라즈베리파이 셋업

1. 해상도가 640 x 480으로 고정된 경우 아래처럼 설정하니까 해상도가 괜찮아짐
   출처: https://www.raspberrypi.org/forums/viewtopic.php?t=285994

I have Ubuntu 20.04 64bit rpi4 8Gb, ubuntu dektop,
2 24" monitor in simple HD
this is my /boot/firmware/usercfg.txt:

dtparam=spi=off
dtoverlay=vc4-fkms-v3d
hdmi_drive:0=1
hdmi_group:0=2
hdmi_mode:0=82
hdmi_force_hotplug=1
hdmi_drive:1=1
hdmi_group:1=2
hdmi_mode:1=82
the :0 and :1 are ti address monitor.

after this the monitor are detected well
sudo systemctl mask systemd-networkd-wait-online.service

-> 리부트 해야함

2. A start job is running for wait for Network to be Configured로 부팅시간이 너무 지연될 때

아래 해결법 적용하니 부팅 빨라짐

출처: https://blog.crois.net/2018/12/06/ubuntu-18-04-a-start-job-is-running-for-wait-for-network-to-be-configured/

리부팅후 systemd-networkd-wait-online.service 서비스를 mask 처리 합니다.

test@ubuntu1804:~$ sudo systemctl mask systemd-networkd-wait-online.service
Created symlink /etc/systemd/system/systemd-networkd-wait-online.service → /dev/null.
test@ubuntu1804:~$

리부팅을 진행 하여 동일한 현상이 있는지 체크 합니다.