[HN Gopher] The input stack on Linux: An end-to-end architecture...
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       The input stack on Linux: An end-to-end architecture overview
        
       Author : venamresm__
       Score  : 93 points
       Date   : 2025-11-27 16:55 UTC (6 hours ago)
        
 (HTM) web link (venam.net)
 (TXT) w3m dump (venam.net)
        
       | charcircuit wrote:
       | How is how inputs gets routed to the right window out of scope
       | for an article that wants to describe input end to end? The fact
       | that input events get carefully routed to the right thing is both
       | important and a potential source of bugs if not implemented
       | correctly.
        
         | venamresm__ wrote:
         | > How is how inputs gets routed to the right window
         | 
         | It is covered for both X11 and Wayland. I just don't get into
         | the particular decisions and details of how each WM/DE picks
         | what they deem the current focused window, since it varies
         | widely and it's more part of window management than of input
         | management (I've written a WM and it's a bit messy). An article
         | on WM/Compositor development would be more appropriate for
         | that, I have a few already on my blog.
        
           | charcircuit wrote:
           | It's not covered.
           | 
           | >Obviously, each have their own internal representation and
           | ways of managing the information they get from libinput, XKB,
           | and others, but this is outside the scope of this article
           | 
           | From what I can tell this is the explaination. It says that
           | they manage input. If this is good enough why not simplify
           | what the kernel does by saying Linux has its own way of
           | handling inputs from keyboard and that is out of scope. It
           | just seems arbitrary what handling of input is and isn't in
           | scope.
        
         | Aurornis wrote:
         | That's the domain of a window manager. It's touched on in the
         | article, but going into detail about the edge cases would
         | require detours into user space window manager choices and even
         | preference settings.
        
           | charcircuit wrote:
           | I'm not even talking about edge cases. It doesn't even give a
           | high level. It just treats wayland and x as big black boxes
           | and does not explain what happens inside of them.
        
       | rbancroft wrote:
       | Very impressive, nice work!
        
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       (page generated 2025-11-27 23:00 UTC)