Compton 90% cpu usage at blank screen idle

[siyia2]

Platform

gentoo/debian

GPU, drivers, and screen setup

ryzen 2200u vega 3 single screen laptop

Environment

xfce4 4.12.5

Compton version

latest from git

Compton configuration:

# Shadow
shadow = true;
no-dnd-shadow = true;
no-dock-shadow = true;
clear-shadow = true;
shadow-radius = 7;
shadow-offset-x = -7;
shadow-offset-y = -7;
shadow-opacity = 0.5;
# shadow-red = 1.0;
# shadow-green = 0.0;
# shadow-blue = 0.0;
shadow-exclude = [
	"name = 'Notification'",
	"class_g = 'VirtualBox'",
	"class_g = 'Chromium'",
	"class_g = 'Conky'",
	"class_g ?= 'Notify-osd'",
	"class_g = 'Cairo-clock'",
	"! name~=''",
	"_GTK_FRAME_EXTENTS@:c"
];
# shadow-exclude = "n:e:Notification";
# shadow-exclude-reg = "x10+0+0";
# xinerama-shadow-crop = true;

# Opacity
menu-opacity = 0.87;
inactive-opacity = 1.0;
# active-opacity = 0.8;
frame-opacity = 0.95;
inactive-opacity-override = false;
alpha-step = 0.06;
# inactive-dim = 0.2;
# inactive-dim-fixed = true;
# blur-background = true;
# blur-background-frame = true;
#blur-kern = "3x3box";
# blur-kern = "5,5,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1";
# blur-background-fixed = true;
#blur-background-exclude = [
#	"window_type = 'dock'",
#	"window_type = 'desktop'",
#	"_GTK_FRAME_EXTENTS@:c"
#];

opacity-rule = [ "80:class_g = 'XTerm'" ];
#opacity-rule = [ "80:class_g = 'UXTerm'" ];
#opacity-rule = [ "99:class_g = 'VirtualBox'" ];

# Fading
#fading = true;
#fade-delta = 10;
#fade-in-step = 0.03;
#fade-out-step = 0.03;
#no-fading-openclose = true;
# no-fading-destroyed-argb = true;
#fade-exclude = [
#];

# Other
backend = "glx";
#backend = "xrender";
mark-wmwin-focused = true;
mark-ovredir-focused = true;
# use-ewmh-active-win = true;
detect-rounded-corners = true;
detect-client-opacity = true;
refresh-rate = 60;
vsync = "opengl-mswc";
#vsync = "opengl";
#dbe = false;
paint-on-overlay = true;
sw-opti = true;
unredir-if-possible = true;
# unredir-if-possible-delay = 5000;
unredir-if-possible-exclude = [ "class_g = 'smplayer'",
"class_g = 'firefox'","class_g = 'Medieval2'" ];
focus-exclude = [ "class_g = 'Cairo-clock'" ];
detect-transient = true;
detect-client-leader = true;
invert-color-include = [ ];
# resize-damage = 1;

# GLX backend
glx-no-stencil = true;
glx-copy-from-front = false;
glx-use-copysubbuffermesa = true;
glx-no-rebind-pixmap = true;
#glx-swap-method = "undefined";
glx-use-gpushader4 = true;
#xrender-sync = true;
#xrender-sync-fence = true;

# Window type settings
wintypes:
{
  tooltip = { fade = true; shadow = true; opacity = 0.75; focus = true; };
};

Steps of reproduction

Let lightdm lock screen at idle after a few minutes compton gets at 90% cpu usage

Expected behavior

1-2% cpu usage at idle

Current Behavior

90% cpu usage at idle

Stack trace

Other details

i use amd and mesa 18.3.2 also laptop has an additional amd dedicated gpu

[yshui]

@siyia2 Does this only happen when you are at the lock screen?

[siyia2]

no it happens after screen is blank and goes to sleep

[yshui]

@siyia2 I might know where the problem is. In you config file, can you try change sw-opti=true to sw-opti=false, and see if that solves your problem?

[siyia2]

ok will do and post back

[siyia2]

wow i think that did the trick!i also changed opacity = 0.75; to opacity = true; in my wintypes,compton cpu usage at idle is 1% now, is this a bug?

[yshui]

@siyia2 Yep, this is a bug. Might still take some time for me to find the root cause. In the meantime, just avoid using sw-opti. I doubt the option actually does anything nowadays.

[siyia2]

ok thx!