docs: add serial port permission denied tip to UART debug common template - #1986
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Milir-Radxa merged 1 commit intoAug 11, 2026
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…late Add a troubleshooting tip for 'Error: Permission denied, cannot open /dev/ttyUSB*' to the shared UART debug template, covering both the temporary chmod workaround and the permanent dialout group membership solution, in both Chinese and English.
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背景
来自支持案例：用户按通用 UART 调试教程操作时，在 Linux 下打开串口报
Error: Permission denied, cannot open /dev/ttyUSB*，教程缺少权限处理说明。修改内容
在通用串口调试模板
_uart_debug.mdx（中文 + 英文）的「登录串口」章节增加:::tip 串口无法打开提示：sudo chmod 666 /dev/ttyUSB0sudo usermod -aG dialout "$USER"，注销重登生效该模板被 dragon/q6a 等多款产品页面引用，修改后全站通用串口教程同步覆盖此常见问题。