@jugg 这个还是从应用软件想办法解决，底层暂时没有可以修改的。可以参考一下MPV播放器的源码实现。

@jugg 默认MPV播放器是否有问题

@jugg 这个只需要替换内核就可以了。跟之前其它FS的方法是一样的。

@jugg 你是什么机器CP4B/CM5，需要接什么屏幕？

@jugg 更新系统不会破坏loader文件。不需要重新升级loader。

@jugg 自己修改一下fstab。

@zensation
The current operation method does not support configuring the up and down status. If you need to modify the up and down status of GPIO, you can use DTS's PINCTRL to achieve it.

	lcd {
		lcdpwr_en: lcdpwr-en {
			rockchip,pins = <1 RK_PC4 RK_FUNC_GPIO &pcfg_pull_down>;
		};
		bl_en: bl-en {
			rockchip,pins = <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

@zensation
First, set the password for the root user, and then log in as root.

coolpi@Ubuntu:~$ sudo passwd root
[sudo] password for coolpi: 
New password: 
BAD PASSWORD: The password is shorter than 8 characters
Retype new password: 
passwd: password updated successfully
coolpi@Ubuntu:~$ su
Password: 
root@Ubuntu:/home/coolpi# echo 128 > /sys/class/gpio/export
root@Ubuntu:/home/coolpi# cd /sys/class/gpio/
root@Ubuntu:/sys/class/gpio# ls
export   gpiochip0    gpiochip32   gpiochip64  unexport
gpio128  gpiochip128  gpiochip509  gpiochip96
root@Ubuntu:/sys/class/gpio# 

@zensation
Can you be more specific about which commands are not working.

@reddfoxx
Thank you for your suggestion. As I haven't paid too much attention to ARMBIAN, I have only tried to develop the corresponding firmware. Currently, my main focus is on Ubuntu Debian Android and the optimization and expansion of the upper and lower layers of the system. You can try adding the Armbian mainline in the future.

@jugg 目前仅支持三屏扩展的方式，mirror暂时不支持。框架本身就不支持。

@jugg 进入系统先新建一个管理员账户，重启，使用新建的管理员账户登陆，然后删除coolpi账户即可。

@jugg 默认用户名：coolpi 密码：123，进入系统以后可以自己添加或者修改。

@jugg 升级最新版本的测试，最先版本可以在百度网盘或者onedrive下载：
CP4

CM5

@jugg 你用的那个版本的系统发出来。

@jugg 现在发布的ubuntu都是默认支持wayland和X11的。

@zensation
The firmware I tested is the latest version 20230613, and you can check if there is a problem with your power adapter causing the reboot.

@zensation
I tested the latest image of ubuntu22.04 and did not find the problem you described. As shown in the following figure, the PWR button is configured as suspend. The first press to enter sleep can be seen from the log information, and the second press to wake up the system.

@zensation I will confirm the CP4 machine and reply to you with the results later.

@zensation The latest images can support suspend operations, including ubuntu. Are you using CP4 or CM5