I am experiencing problems with the shadow display of the Compton composite manager. In certain situations, the frame for the shadows exceeds the window it is applied to, leaving a visible border and sort of a transparent box around it.
This seems to occur every time a window or frame overlay is not perfectly rectangular, such as the automatic scroll pointer in Firefox or the addon-menus with little arrowheads on top (please see the screenshot below for reference). There are a few other occasions like these outside my web browser, but I am not able to remember anything in particular at the moment.
Because of tearing issues with my video card, I am required to use Compton as the compositor for my XFCE desktop environment and I have been very happy with it so far, except for the visual issue with these shadows.
I thought that my configuration file might not be set up optimally, I also tried to add the option detect-rounded-corners = true; to it, but that did not make any difference.
Is there a solution to this problem? And are there some good Compton configurations which I could use as a base for my settings in general?
My Compton configuration file looks like this at the moment:
#--------------------------------
#-------Backend Settings:--------
#--------------------------------
backend = "glx"; # Use GLX backend for rendering
vsync = "opengl"; # Use OpenGL to implement vsync
glx-swap-method = 3; # Use a triple-buffer
paint-on-overlay = true; # Improves performance (usually) and reduces flickering
glx-no-stencil = true; # Improves performance
glx-no-rebind-pixmap = true; # Improves performance with rapid window changes, might not work with some drivers
#--------------------------------
#--------Shadow Settings:--------
#--------------------------------
shadow = true; # Enable drawing shadows on windows
shadow-radius = 8; # The blur radius for shadows
shadow-offset-x = -8; # The horizontal offset for shadows
shadow-offset-y = -8; # The vertical offset for shadows
clear-shadow = true; # Zero the part of the shadow's mask behind the window, may break some applications
no-dock-shadow = true; # Do not draw shadows on docks/panels
no-dnd-shadow = true; # Do not draw shadows on DND windows
shadow-exclude = [ # Do not draw shadows on these specific applications:
#"! name~=''",
"n:e:Notification",
"n:e:Plank",
"n:e:Docky",
"g:e:Synapse",
"g:e:Kupfer",
"g:e:Conky",
"n:w:*dockbarx*",
#"n:w:*Firefox*",
#"n:w:*Chrome*",
#"n:w:*Chromium*",
"class_g ?= 'Notify-osd'",
"class_g ?= 'Cairo-dock'",
"class_g ?= 'Xfce4-notifyd'",
"class_g ?= 'Xfce4-power-manager'"
];
#--------------------------------
#--------Fading Settings:--------
#--------------------------------
fading = true; # Enable fading windows during opacity changes
fade-delta = 4; # The time between steps in a fade in milliseconds
fade-in-step = 0.03; # The opacity change between steps while fading in
fade-out-step = 0.03; # The opacity change between steps while fading out
detect-client-opacity = true; # Prevent opacity from being ignored for some applications
#--------------------------------
#--------Window Settings:--------
#--------------------------------
wintypes: # Change behavior for these specific types of windows:
{
tooltip = { fade = true; shadow = false; };
};
detect-rounded-corners = true;
I've had another configuration before with which this problem existed as well though.
My hardware is as follows:
MB Gigabyte GA-H97 HD3
CPU Intel Xeon E3-1231 (No AGP)
RAM 32GB DDR3
GPU Nvidia Quadro 5000
2560x1080 Display, 60 Hz, connected via DisplayPort
