I'm using the i3 tiling window manager. As it doesn't do compositing, I've enabled the xcompmgr compositor in my ~/.i3/config file as well as feh to display a wallpaper:

exec --no-startup-id xcompmgr -c -C -t-5 -l-5 -r4.2 -o.55
exec feh --bg-scale ~/Downloads/Arch-Linux-Bluewave.jpg

Now lxterminal supports translucency etc. but when I arrange my terminals vertically, some ghosting, tearing and decoration artifacts from other workspaces appear to the top right - and disappear as soon as the window is tiled horizontally. Furthermore, when transmission-gtk "floats" a dialog box, moving that box around leaves ghosting in the form of tiny horizontal lines which remain until some refresh.

Is there any workaround?


The symptoms arise from two distinct issues here:

  1. The compositor: use something more recent like Compton in this case, with the following last options if supported by your hardware:

    exec --no-startup-id compton -cCGb --backend glx --vsync opengl
  2. The fact that compositors are not officially supported by this window manager and because of the way i3 renders window title bars. A well-known workaround is to disable such title bars by adding to ~/.i3/config:

    new_window pixel

To move around a floating window with no titlebar, use mod+drag anywhere on it. Finally, some of this may change over time.

  • 1
    In looking at the documentation for Compton ( wiki.archlinux.org/index.php/Compton ), it looks like the -c argument enables shadows and the -CG part disables shadows. It seems that the -c part wins in this case, and can cause the i3 title bar to produce a shadow over the associated window, giving a strange effect. I've had better luck by omitting the -c portion. Example: compton -CGb --backend glx --vsync opengl – Matt Ball Feb 3 '16 at 21:11

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