QT_QPA_EGLFS_PHYSICAL_WIDTH

QT_QPA_EGLFS_PHYSICAL_WIDTH是一个环境变量，用于设置Qt在eglfs模式下的物理宽度。\[1\]在使用本机API的显示指标查询操作系统时，或者在eglfs情况下，可以依靠QT_QPA_EGLFS_PHYSICAL_WIDTH来设置显示的物理宽度。\[1\]如果你想手动设置QT_QPA_EGLFS_PHYSICAL_WIDTH的值，可以使用export命令来设置环境变量，例如export QT_QPA_EGLFS_PHYSICAL_WIDTH=1024。\[2\]这样就可以将QT_QPA_EGLFS_PHYSICAL_WIDTH设置为1024。如果你在运行Qt5时遇到了关于QT_QPA_EGLFS_PHYSICAL_WIDTH的错误信息，例如"Unable to query physical screen size, defaulting to 100dpi. To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters)."，你可以尝试手动设置QT_QPA_EGLFS_PHYSICAL_WIDTH和QT_QPA_EGLFS_PHYSICAL_HEIGHT的值来解决这个问题。\[3\]
#### 引用[.reference_title]
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