@tonyone0902 This is usually caused by unstable power supply, such as insufficient input power of the adapter, or power failure at the moment of switching.

@reddfoxx Refer to attachment link：
https://www.aliexpress.us/item/3256803830903295.html?spm=a2g0o.productlist.main.51.2d623ca45F44fO&algo_pvid=370776b3-bc3a-44b3-b469-07b7abd5eb71&algo_exp_id=370776b3-bc3a-44b3-b469-07b7abd5eb71-25&pdp_ext_f={"sku_id"%3A"12000027750691599"}&pdp_npi=2%40dis!USD!0.17!0.13!!!!!%40212244c416739165017785791d0685!12000027750691599!sea&curPageLogUid=LiqQEObfPtMi

@HiramXMaxim Please provide the model of the card reader you use, or take a photo and send it to us. Let's buy the same model and test it. thank you.

@HiramXMaxim This may be the compatibility problem of the card reader. You can first make the image into the TF card, and then use the migration script of armbian to migrate the image to EMMC.

@bbsvs2000 CH341默认内核config里边没有打开，如下图所示打开配置重新编译内核再测试。

@retroman The problem of wifi bt has been solved. Please follow github to submit or download the latest firmware test. Thank you.

@retroman The problem of WIFI BT is being solved. An update will be released in the next few days.

@retroman Please follow that github will continue to update, thank you.

@retroman https://www.cool-pi.com/topic/162/how-to-upgrade-the-boot-loader-of-coolpi-4b?_=1673496991046

If you need to boot armbian normally, you need to update the loader file to version 0104.

Follow the steps below to update the loader:

• Download the latest loader file One Drive
  ![5594e1d4-3a7b-46fc-a7b5-2a9fe418dfc0-image.png]
  

• Short the 2 pins shown by the arrow.
  

• The USB interface and computer connection.
  

• Plug in the power supply and open the upgrade software. The machine enters the maskrom upgrade mode.
  

• choose to write by address
  

• Click Execute to complete the loader update.
  

• If the computer prompts that the USB driver cannot be found, please download and install the driver software first.One Drive
  

@retroman Try formatting the TF card before mirroring it. If it does not work properly, it is recommended to upgrade the loader file.

@HiramXMaxim The EMMC small board has an adapter for converting to TF card, which can be written to the EMMC using a common card reader. As shown in the figure below.

---

Open source repositories:Github
Image download:One Drive 百度网盘

Open source repositories:Github
Image download:One Drive

enable 3D acceleration:

sudo add-apt-repository ppa:george-coolpi/mali-g610
sudo add-apt-repository ppa:george-coolpi/multimedia
sudo apt update
sudo apt dist-upgrade

installing the MPV video player:（Support rkmpp hardware decoding）

sudo apt-get install mpv

@retroman Thank you for your suggestion. We will discuss the time point of support internally.

@retroman The armbian image of coolpi will be released soon.

@harry-huang
https://m.tb.cn/h.UPjG7P6?tk=NHJfdfghK8D CZ0001 「树莓派3B+4B通用亚克力外壳多主板多层堆叠加自由组装集群实验4层」
点击链接直接打开 或者 淘宝搜索直接打开

@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.

@花月 注意python版本，其它都是一样的。ubuntu22.04 默认python3.10，要注意切换一下。

@花月 具体一些，需要哪部分？因为本身linux系统相当庞大，基础的操作文档网络上的资料可能更系统一些。如果针对某些特定模块可以提出来。