Topics created by jugg

@jugg ls -l /media/ 查看权限，如果是root，可以试下sudo chown -R coolpi:coolpi /media/coolpi

@jugg 还是以CM5为主，现在研发都投入到CM5定制化产品和软件维护。暂时没有计划开发新的核心板。

@jugg 你试下不改多指配置，编译内核再更新有无报错，能自行改内核是最好的

@jugg ffmpeg目前只有硬件解码没有编码

@jugg 看iso名称，install是安装系统用的。备份使用backup iso

@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 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
对的。

https://www.cool-pi.com/topic/345/ch34x-uart-for-ubuntu22

用modetest 试试，指定输出，对应的输出设备id需要查找

@jugg 开机logo更新

https://www.cool-pi.com/topic/211/coolpi-4b-support-dynamic-update-logo

@george
可以编译了

@george

驱动里面可以这样改 系统里面怎么改?默认就关闭电源管理

@jugg said in 内核更新失败 开机停在logo界面:

@大法师
没刷最新的loader
我又试了一块板 按照更新的步骤 sync 了之后 断电重启 还是不行 驱动那里还是空的

还真的是要sync 不能直接断电重启

@george
这个需要怎么测？什么命令？

@george 又接了一个USB麦克风 也不能录 提示同样的错误
只能重启 重启后也只能录一次 第二次就不能录了
后面又测试了一下 发现是因为在开机之前接了一个显示屏和一个HDMI显示器 开机之后再把HDMI拔掉之后再录音
就出现上面的情况

@jugg
刷机占用多少，安装包预装以及使用过程apt 相关安装都会占用空间，还有系统/var/log/journal也会持续增长。具体可以逐个分析每个目录大小

cd / du -sh * --exclude="proc"

88x2 的驱动编译安装后
使用这个wifi的网络系统必崩溃
COM_4_2023-05.log

@大法师
加了确实可以录
只是CPU使用率太高了 200% 300%了

@george 是的，并不影响播放视频，我运行Qt程序只要全屏也会一直输出这个，我把它屏蔽好了

@wuming 按照如下方法操作，格式化EMMC
1.按住中间的loader按键同时短按复位按键，机器就会进入maskrom模式，如下图所示：
7438b967-6270-4ade-a8b7-169d2116e3ce-image.png
2.选择loader文件，选择EMMC，点击download，等待完成以后点击Eraseall。即可完成EMMC擦除。
b965b96b-f544-4f6b-b3a2-290280afc612-image.png
3.短按复位按键，快速按三次pwr按键，机器就会进入MSC模式
bd94ab8d-f5bb-4667-98ff-c98949a7cdc0-image.png
4.使用etcher选择固件和MSC设备烧录即可。
7eae8b04-f7fd-4106-a079-f72735468737-image.png

@jugg 还可以参考下图方法直接dump出buffer
4576f6c9-670c-4d3e-a852-edb90eb4874f-image.png

@george
yuv i420那个有办法吗
videoconvert
mppjpegdec
好像都不支持从nv12转i420

@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]

@george
上面那个命令末尾添加sync=false 就正常了

@jugg 这个建议不错，需要做这类的参考文档

@Yannis
sudo apt update
sudo apt upgrade
按顺序执行

@george
我已经发现了会独占屏幕 锁屏了图像还在。。

@george 有这样的文档已经很不错了 感谢