针对Cool Pi 4B主板，如需更新u-boot操作如下：

0823版本请升级到0904

1. 下载0904版本bin文件
   uboot.zip

2. 解压zip，将bin文件拷贝到U盘或Tf卡根目录

3. 将U盘或Tf卡插入主板，连接Debug串口到PC电脑，打开串口终端工具，主板通电，连续输入大写CP中止u-boot自动启动

   备注：请注意U盘启动或升级仅支持插入USB3 下层端口

4. 在u-boot shell命令行窗口，
   针对串口输出信息如下的主板

COOLPI LOADER BY YANYI(Aug 23 2022)                                             
                                                                                
DRAM:  3.7 GiB                                                                  
CR: M/C/I                                                                       
Using default environment

A) 如果是从U盘导入文件升级步骤
usb reset
load usb 0:1 0x800000 uboot.img
mtd erase nor0 0x200000 0x500000
mtd write nor0 0x800000 0x200000 0x500000
擦除与写入过程请勿断电或重启

B) 如果是从TF卡导入文件升级步骤
mmc dev 1
load mmc 1:1 0x800000 uboot.img
mtd erase nor0 0x200000 0x500000
mtd write nor0 0x800000 0x200000 0x500000
擦除与写入过程请勿断电或重启

5. 等待执行完毕，确认无异常后，断电或reset即可。

6. 升级完成后，串口输出信息如下

COOLPI LOADER BY YANYI(Sep 03 2022)                                             
                                                                                
DRAM:  3.7 GiB                                                                  
Using default environment

后续的升级指令封装为
c update usb|tf|mmc

tf卡升级测试：
CPBOOT# v                                                                       
COOLPI LOADER BY YANYI(Sep 03 2022)                                             
                                                                                
aarch64-none-linux-gnu-gcc (GNU Toolchain for the A-profile Architecture 10.3-21
GNU ld (GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)) 1
CPBOOT# c update tf                                                             
reading uboot.img                                                               
5242880 bytes read in 428 ms (11.7 MiB/s)                                       
wait for erase...                                                               
uboot upgrade ok...                                                             
CPBOOT# reset

u盘升级测试：
CPBOOT# v                                                                       
COOLPI LOADER BY YANYI(Sep 03 2022)                                             
                                                                                
aarch64-none-linux-gnu-gcc (GNU Toolchain for the A-profile Architecture 10.3-21
GNU ld (GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)) 1
CPBOOT# c update usb                                                            
resetting USB...                                                                
Bus usb@fc880000: USB EHCI 1.00                                                 
scanning bus usb@fc880000 for devices... 2 USB Device(s) found                  
       scanning usb for storage devices... 1 Storage Device(s) found            
reading uboot.img                                                               
5242880 bytes read in 363 ms (13.8 MiB/s)                                       
wait for erase...                                                               
uboot upgrade ok...                                                             
CPBOOT# reset
备注：请注意U盘启动或升级仅支持插入USB3 下层端口

RKDevTool_Release_v2.92_loader0104.zip

You can try refuse loader program and check if display coolpi logo.

宝塔是什么，可以查看demo页面

apt-get install wget curl

wget -O install.sh http://download.bt.cn/install/install-ubuntu_6.0.sh

sudo bash install.sh

安装成功后，保存账户信息用于内网面板登陆

==================================================================
Congratulations! Installed successfully!
==================================================================
外网面板地址: http://xxx.226.28.51:8888/dc404f6c
内网面板地址: http://192.168.3.xx:8888/dc404f6c
username: xxxx
password: xxxx
If you cannot access the panel,
release the following panel port [8888] in the security group
若无法访问面板，请检查防火墙/安全组是否有放行面板[8888]端口
==================================================================
Time consumed: 9 Minute!
ubuntu@coolpi:~$

1. 串口引脚说明

40PIN引脚，其中第8、10、14引脚信号分别对应TXD RXD GND，3.3V TTL电平，请连接到USB转TTL模块上。
如下图：

图中标号1连接GND
图中标号2连接USB串口模块TXD
图中标号3连接USB串口模块RXD

上图中40 pin排母功能定义如下表（图中左下为编号1，左上为编号2，右下为编号39，右上为编号40）

2. 串口工具putty

串口工具不限，附件仅作为参考使用
putty.zip

电脑串口工具设置串口波特率115200，8比特数据位，1个停止位，无校验，关闭流控。
putty串口工具配置参考

@retroman
also use onedrive link(https://1drv.ms/u/s!AhSBNZjrDPlSanDDQF7WowYhiz8?e=lRpMrk). And then the top u3 port is used for adb debug.

基于Coolpi 4B搭建流行的gitlab服务器，一步到位。
gitlab_install.sh

ubuntu@coolpi:~$ ./gitlab_install.sh 
libcurl4 was already not on hold.
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
curl is already the newest version (7.81.0-1ubuntu1.6).
0 upgraded, 0 newly installed, 0 to remove and 230 not upgraded.
Detected operating system as Ubuntu/jammy.
Checking for curl...
Detected curl...
Checking for gpg...
Detected gpg...
Running apt-get update... done.
Installing apt-transport-https... done.
Installing /etc/apt/sources.list.d/gitlab_gitlab-ce.list...done.
Importing packagecloud gpg key... done.
Running apt-get update... done.

The repository is setup! You can now install packages.
ubuntu@coolpi:~$ 

选择你需要的版本，安装它

ubuntu@coolpi:~$ sudo apt install gitlab-ce=15.6.0-ce.0
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following NEW packages will be installed:
  gitlab-ce
0 upgraded, 1 newly installed, 0 to remove and 230 not upgraded.
Need to get 1,148 MB of archives.
After this operation, 3,869 MB of additional disk space will be used.
Get:1 https://packages.gitlab.com/gitlab/gitlab-ce/ubuntu jammy/main arm64 gitlab-ce arm64 15.6.0-ce.0 [1,148 MB]
Fetched 1,148 MB in 1min 10s (16.3 MB/s)                                       
Selecting previously unselected package gitlab-ce.
(Reading database ... 148928 files and directories currently installed.)
Preparing to unpack .../gitlab-ce_15.6.0-ce.0_arm64.deb ...
Unpacking gitlab-ce (15.6.0-ce.0) ...
Setting up gitlab-ce (15.6.0-ce.0) ...
It looks like GitLab has not been configured yet; skipping the upgrade script.

       *.                  *.
      ***                 ***
     *****               *****
    .******             *******
    ********            ********
   ,,,,,,,,,***********,,,,,,,,,
  ,,,,,,,,,,,*********,,,,,,,,,,,
  .,,,,,,,,,,,*******,,,,,,,,,,,,
      ,,,,,,,,,*****,,,,,,,,,.
         ,,,,,,,****,,,,,,
            .,,,***,,,,
                ,*,.
  


     _______ __  __          __
    / ____(_) /_/ /   ____ _/ /_
   / / __/ / __/ /   / __ `/ __ \
  / /_/ / / /_/ /___/ /_/ / /_/ /
  \____/_/\__/_____/\__,_/_.___/
  

Thank you for installing GitLab!
GitLab was unable to detect a valid hostname for your instance.
Please configure a URL for your GitLab instance by setting `external_url`
configuration in /etc/gitlab/gitlab.rb file.
Then, you can start your GitLab instance by running the following command:
  sudo gitlab-ctl reconfigure

For a comprehensive list of configuration options please see the Omnibus GitLab 
readme
https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/README.md

Help us improve the installation experience, let us know how we did with a 1 min
ute survey:
https://gitlab.fra1.qualtrics.com/jfe/form/SV_6kVqZANThUQ1bZb?installation=omnib
us&release=15-6

ubuntu@coolpi:~$

修改默认配置文件，重新部署初始化配置

ubuntu@coolpi:~$ sudo vim /etc/gitlab/gitlab.rb
...
#external_url 'http://gitlab.example.com'
external_url 'http://192.168.1.172'
...

ubuntu@coolpi:~$ sudo gitlab-ctl reconfigure
...
Notes:
Default admin account has been configured with following details:
Username: root
Password: You didn't opt-in to print initial root password to STDOUT.
Password stored to /etc/gitlab/initial_root_password. This file will be cleaned up in first reconfigure run after 24 hours.

NOTE: Because these credentials might be present in your log files in plain text, it is highly recommended to reset the password following https://docs.gitlab.com/ee/security/reset_user_password.html#reset-your-root-password.

gitlab Reconfigured!

初始root用户密码请查看文件

ubuntu@coolpi:~$ sudo cat /etc/gitlab/initial_root_password
[sudo] password for ubuntu: 
# WARNING: This value is valid only in the following conditions
#          1. If provided manually (either via `GITLAB_ROOT_PASSWORD` environment variable or via `gitlab_rails['initial_root_password']` setting in `gitlab.rb`, it was provided before database was seeded for the first time (usually, the first reconfigure run).
#          2. Password hasn't been changed manually, either via UI or via command line.
#
#          If the password shown here doesn't work, you must reset the admin password following https://docs.gitlab.com/ee/security/reset_user_password.html#reset-your-root-password.

Password: HQQY3tBsOGOW2jd2gmiLDROf3fEnKH8CW3ZFnikPlHg=

# NOTE: This file will be automatically deleted in the first reconfigure run after 24 hours.

浏览器访问http://localhost 或者 http://192.168.1.172

Debian11

流程操作体验，视频硬解码，简洁桌面xfce

终端命令行清晰可见

谷歌浏览器轻松访问

B站视频内容尽享

高清视频解码

Debian11 & Ubuntu image for coolpi 4b

Onedrive

https://www.cool-pi.com/topic/126/coolpi-4b-镜像固件离线刷机方法

https://www.cool-pi.com/topic/127/coolpi-4b-镜像固件在线刷机方法

@retroman
hi, thanks for your advice. This work will be long and continue. We need more community friends to participate.

@edwardzhou 用U盘备份安装系统，不用考虑移除emmc

@jugg

coolpi@coolpi:~$ sudo apt install qtmultimedia5-dev 
[sudo] password for coolpi: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
  libllvm15
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  libblkid-dev libglib2.0-dev libglib2.0-dev-bin libmount-dev libpcre16-3
  libpcre2-dev libpcre2-posix3 libpcre3-dev libpcre32-3 libpcrecpp0v5
  libqt5multimedia5 libqt5multimediagsttools5 libqt5multimediaquick5
  libqt5multimediawidgets5 libselinux1-dev libsepol-dev uuid-dev
Suggested packages:
  libgirepository1.0-dev libglib2.0-doc
The following NEW packages will be installed:
  libblkid-dev libglib2.0-dev libglib2.0-dev-bin libmount-dev libpcre16-3
  libpcre2-dev libpcre2-posix3 libpcre3-dev libpcre32-3 libpcrecpp0v5
  libqt5multimedia5 libqt5multimediagsttools5 libqt5multimediaquick5
  libqt5multimediawidgets5 libselinux1-dev libsepol-dev qtmultimedia5-dev
  uuid-dev
0 upgraded, 18 newly installed, 0 to remove and 0 not upgraded.
Need to get 4799 kB of archives.
After this operation, 23.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] 

coolpi@coolpi:~$ sudo apt install qtmultimedia5-dev 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
  libllvm15
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  libblkid-dev libglib2.0-dev libglib2.0-dev-bin libmount-dev libpcre16-3
  libpcre2-dev libpcre2-posix3 libpcre3-dev libpcre32-3 libpcrecpp0v5
  libqt5multimedia5 libqt5multimediagsttools5 libqt5multimediaquick5
  libqt5multimediawidgets5 libselinux1-dev libsepol-dev uuid-dev
Suggested packages:
  libgirepository1.0-dev libglib2.0-doc
The following NEW packages will be installed:
  libblkid-dev libglib2.0-dev libglib2.0-dev-bin libmount-dev libpcre16-3
  libpcre2-dev libpcre2-posix3 libpcre3-dev libpcre32-3 libpcrecpp0v5
  libqt5multimedia5 libqt5multimediagsttools5 libqt5multimediaquick5
  libqt5multimediawidgets5 libselinux1-dev libsepol-dev qtmultimedia5-dev
  uuid-dev
0 upgraded, 18 newly installed, 0 to remove and 0 not upgraded.
Need to get 4799 kB of archives.
After this operation, 23.8 MB of additional disk space will be used.
Do you want to continue? [Y/n]

@xingzhan2012 said in Cool pi 4B & CM5 探索快速安装系统新方法:

@大法师 牛逼，也就是U盘里创建一个backpu文件夹，插在USB口上，开机自动备份到backup文件夹中。 U盘中创建一个install文件夹，开机自动将install中的系统刷入emmc中。Cool Pi 4B Linux System Backup.iso中的文件替换掉系统中的/boot/firmware 文件夹中的文件是吧。这些启动文件是ubuntu22.04系统的么？是和系统版本无关么？

安装备份操作，与rootfs系统无关，可以是任意制作的linux 根文件系统。这种方式适合开发者调试，可以是openwrt或buildroot或yocto等等

@xingzhan2012
备份还原操作，可以同一个U盘，把backup iso中的initrd.img拷贝到install iso 中，重命名为initrd-backup.img。

想加载哪个功能，直接修改extlinux.conf启动哪个文件即可。当然配套backup目录可以直接重命名为install，更直接了

@xingzhan2012
太自动化会引起误操作。确实有必要备份重新安装，也不差一次拷贝动作

@tonyone0902
vim /boot/firmware/config.txt 一样修改dtb文件名试下。你的机器是什么时间收到的，早期的loader不识别extlinux.conf

另外查看下 ls -l /sys/class/drm/

@xingzhan2012 像Windows一样自动安装、自动备份，一个U盘搞定，无需额外操作

@tonyone0902
系统终端输入dmesg > kernel.log

把kernel.log发上来看下。

@xingzhan2012
欢迎验证系统备份功能

假定手上有两个U盘，一个制作为系统初始化安装U盘A，另一个制作为系统备份U盘B。

当用户在系统中安装或修改各种配置操作后，如需要备份保存系统，那么请关机，插入备份U盘B，开机自动完成备份操作（备份文件在backup目录）。

当用户想恢复备份的系统到coolpi 4b板载的存储emmc，那么可以将备份U盘B中的backup目录内容拷贝到安装U盘A install目录（请注意先删除install目录文件），插入安装U盘A，开机自动完成系统安装操作。

@tonyone0902
5寸电容触摸屏切换操作参考，使用ubuntu 22.04 20230306版本

需要切换使用rk3588s-cp4-dsi.dtb文件

coolpi@coolpi:~/Desktop$ cat /boot/firmware/
Image                      cmdline.txt                extlinux/                  modules.tar.gz             rk3588s-cp4.dtb            
System Volume Information/ config.txt                 initrd.img                 rk3588s-cp4-dsi.dtb        vmlinuz                    
coolpi@coolpi:~/Desktop$ cat /boot/firmware/extlinux/extlinux.conf 
default Linux coolpi

label Linux coolpi
	kernel /Image
	initrd /initrd.img
	fdt    /rk3588s-cp4-dsi.dtb
	append root=LABEL=writable rw rootfstype=ext4 console=ttyS0,115200n81 quiet splash plymouth.ignore-serial-consoles vt.global_cursor_default=1 irqchip.gicv3_pseudo_nmi=0 net.ifnames=0
coolpi@coolpi:~/Desktop$