从Ubuntu18.04升级到20.04后,chip刷机提示usb_bulk_send() ERROR -7: Operation timed out
解决方法
wget http://ftp.br.debian.org/debian/pool/main/s/sunxi-tools/sunxi-tools_1.4.1-1_amd64.deb
sudo dpkg -i sunxi-tools_1.4.1-1_amd64.deb
然后

sudo apt-mark hold sunxi-tools

参考链接
https://steward-fu.github.io/website/umpc/pocketchip/fix_usb.htm
https://github.com/Thore-Krug/Flash-CHIP/issues/21

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