Window flickers on startup

[stephanoskomnenos]

Describe the bug
Window flickers on startup under Wayland.

To Reproduce
Just launch it under Wayland.

Screenshots

video.mp4

Environment details

kitty 0.25.2 created by Kovid Goyal
Linux smyrna 5.18.6-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jun 22 13:46:18 UTC 2022 x86_64
S
Kernel 5.18.6-200.fc36.x86_64 on an x86_64 (/dev/tty)

Running under: Wayland
Frozen: False
Paths:
  kitty: /usr/bin/kitty
  base dir: /usr/lib64/kitty
  extensions dir: /usr/lib64/kitty/kitty
  system shell: /usr/bin/zsh
Loaded config files:
  /home/lin/.config/kitty/kitty.conf

Config options different from defaults:
background_opacity    0.95
enabled_layouts       ['splits']
font_family           JetBrains Mono
font_size             12.0
initial_window_height (500, 'px')
initial_window_width  (750, 'px')
remember_window_size  False
Added shortcuts:
	f4 → launch --location=split
	f7 → layout_action rotate
	shift+left → move_window left
	shift+right → move_window right
	shift+up → move_window up
	shift+down → move_window down
	alt+left → resize_window narrower
	alt+right → resize_window wider
	alt+up → resize_window taller
	alt+down → resize_window shorter 3
	ctrl+- → launch --location=hsplit
	ctrl+\ → launch --location=vsplit
	ctrl+left → neighboring_window left
	ctrl+right → neighboring_window right
	ctrl+up → neighboring_window up
	ctrl+down → neighboring_window down
Colors:
	background            #282c34   
	color0                #282c34   
	color1                #e06c75   
	color10               #56b6c2   
	color11               #e5c07b   
	color12               #61afef   
	color13               #be5046   
	color14               #56b6c2   
	color15               #abb2bf   
	color2                #98c379   
	color3                #e5c07b   
	color4                #61afef   
	color5                #be5046   
	color6                #56b6c2   
	color7                #979eab   
	color8                #393e48   
	color9                #d19a66   
	foreground            #979eab   
	selection_background  #979eab   
	selection_foreground  #282c34   

Important environment variables seen by the kitty process:
	PATH                                /tools/Xilinx/Vivado/2021.2/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/home/lin/.local/bin:/home/lin/Android/flutter/bin
	LANG                                en_US.UTF-8
	EDITOR                              vim
	SHELL                               /usr/bin/zsh
	DISPLAY                             :0
	WAYLAND_DISPLAY                     wayland-0
	USER                                lin
	XDG_MENU_PREFIX                     gnome-
	XDG_SESSION_DESKTOP                 gnome
	XDG_SESSION_TYPE                    wayland
	XDG_CURRENT_DESKTOP                 GNOME
	XDG_SESSION_CLASS                   user
	XDG_RUNTIME_DIR                     /run/user/1000
	XDG_DATA_DIRS                       /home/lin/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share/:/usr/share/

[kovidgoyal]

Ah the wondrous wayland and GNOME combination again I am guessing. I'm afraid I have zero interest in spending anymore of my life on that shitshow. Patches are most welcome. Relevant code in wl_window.c and wl_init.c

[kovidgoyal]

Turns out there is a simple change I can make that should reduce flicker in this supposedly flicker free rendering system :))

[stephanoskomnenos]

Thanks. The nightly version works fine:)