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![Jasper St. Pierre](/assets/img/avatar_default.png)
RandR's QueryOutputProperty request makes the incredible decision of throwing a BadName if you pass a property that doesn't exist, which means that trying to check if a property exists is a royal pain when using Xlib. XCB's interface is much more friendly about errors and not having global state and things like that, so use that instead to query our backlight property.