Coolpi 4b Ubuntu22.04 原生系统

[zensation]

@george i was trying to log in via com port but on serial connection. i didnt find it documented so anyone else that runs into the issue the username is ubuntu and the password is coolpi

[george]

@zensation If this is the case, it means that the image you are using is incorrect, or it is not successfully created.

[zensation]

@george its exactly correct based on other screenshots of the ubuntu 22.0.4 builds seen on here that also show a username of ubuntu and somewhere someone shared their password as coolpi. i was able to figure it out when i plugged in an hdmi cable. before that was just trying to access terminal through UART.

[cbratschi]

This post is deleted!

[george]

@allen 更新内核代码，已经解决了概率鼠标消失问题。
@cbratschi Add onedrive download link.

[Twsuts]

我在系统中使用想开机自启动一个QT程序，我沿用了树莓派的方法，在~/.profile文件中添加了我的启动路径，但是程序并没有像树莓派一样启动，传统的自启动程序会进入桌面再启动程序，效果会差很多时间也长很多，还有就是开机的动画能不能有个教程，如果太忙了就算了，希望能回答我第一个问题

[大法师]

@Twsuts
提供个demo与配置，我们测试下

[Twsuts]

@大法师 配置就是在~/profile文件末尾加上 echo “coolpi” | sudo -S /home/coolpi/qt5/demo ,这是启动程序的命令，树莓派跟我以前用的ROCKPI正常是能启动程序的，在界面出来以前，你看到的效果就是黑屏然后直接进入了我们的程序，demo可以随便写一个QT demo，然后开机重启的时候看能不能在进入界面之前启动

[大法师]

@Twsuts
这是阻塞系统运行？还是后台运行作为开机动画？

我试了分别在/etc/profile、/home/coolpi/.profile文件尾增加qt demo是可以的

sudo apt install qtbase5-examples

coolpi@coolpi:~$ cat /etc/profile
# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ "${PS1-}" ]; then
  if [ "${BASH-}" ] && [ "$BASH" != "/bin/sh" ]; then
    # The file bash.bashrc already sets the default PS1.
    # PS1='\h:\w\$ '
    if [ -f /etc/bash.bashrc ]; then
      . /etc/bash.bashrc
    fi
  else
    if [ "`id -u`" -eq 0 ]; then
      PS1='# '
    else
      PS1='$ '
    fi
  fi
fi

if [ -d /etc/profile.d ]; then
  for i in /etc/profile.d/*.sh; do
    if [ -r $i ]; then
      . $i
    fi
  done
  unset i
fi

#echo "coolpi" | sudo -S /usr/lib/aarch64-linux-gnu/qt5/examples/gui/analogclock/analogclock
coolpi@coolpi:~$

coolpi@coolpi:~$ cat ~/.profile 
# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask
# for ssh logins, install and configure the libpam-umask package.
#umask 022

# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
        . "$HOME/.bashrc"
    fi
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/.local/bin" ] ; then
    PATH="$HOME/.local/bin:$PATH"
fi

echo "coolpi" | sudo -S /usr/lib/aarch64-linux-gnu/qt5/examples/gui/analogclock/analogclock
coolpi@coolpi:~$

因为不是后台运行，重启后会阻塞桌面系统显示窗口。此时可以通过键盘ctrl+alt+f6切换到终端命令行进行恢复修改操作。

也可以后台运行测试

vim ~/.profile
...
echo "coolpi" | sudo -S /usr/lib/aarch64-linux-gnu/qt5/examples/gui/analogclock/analogclock &

[Twsuts]

@大法师 感谢您的回答，您的操作看起来很正常，这样看来确实很奇怪，但我这边不论是ubuntu22还是ubuntu20我在.profile文件下启动我的qt程序都没反应，它会直接进入桌面，而在/etc/xdg/autostart/下可以自动启动我的应用程序，但是后者显示屏会出现几秒钟的ubuntu图形界面，这看起来很糟糕！

[大法师]

@Twsuts
百度网盘或onedrive有最新镜像，是否镜像不一致？

[Twsuts]

@大法师 前天刚刷的最新镜像，甚至于我在使用ssh登陆时都能启动程序，终端登陆就会启动程序，但是显示屏上就是直接进入了桌面。

[大法师]

@Twsuts
是不是自动登陆设置打开了？

[Twsuts]

@大法师 还真是的

[Twsuts]

@大法师 关了也没用，换了一个最简单的demo也没用，我只能通过我原来的方法启动程序，然后把整个桌面服务关了试试看了，不过这样启动会慢很多

[顾真牛]

@Twsuts 看看登录服务用的是什么gdm还是LightDM，改那个的配置文件。不启动桌面启动你的QT程序

[顾真牛]

@Twsuts SSH能启动 开机不启动，你看看是不是用户不一致

[Twsuts]

@顾真牛 用户都是一样的coolpi，我现在解决了这个问题，在那之前加入export DISPLAY=:0 这样就可以启动了

[Twsuts]

@顾真牛 @大法师 感谢你们的帮助