Visual Artifacts appear when using Wezterm

[keanesc]

What Operating System(s) are you seeing this problem on?

Windows

Which Wayland compositor or X11 Window manager(s) are you using?

Windows 11 GlazeWM

WezTerm version

WezTerm-windows-20240812-215703-30345b36

Did you try the latest nightly build to see if the issue is better (or worse!) than your current version?

Yes, and I updated the version box above to show the version of the nightly that I tried

Describe the bug

While typing artifacts appear at random occasions.

Wezterm.Visual.Artifacts.2024-09-09.mp4

Tried the nightly build (.zip) but saw no difference.

To Reproduce

It's occurred since installation. Tried both the setup.exe as well as the .zip

Configuration

Issue occurs with no config as well

-- Pull in the wezterm API
local wezterm = require 'wezterm'

-- This will hold the configuration.
local config = wezterm.config_builder()

-- This is where you actually apply your config choices

-- Colour Scheme
config.force_reverse_video_cursor = true
local function get_appearance()
  if wezterm.gui then
    return wezterm.gui.get_appearance()
  end
  return 'Dark'
end

local function scheme_for_appearance(appearance)
  if appearance:find 'Dark' then
    return 'tokyonight_night'
  else
    return 'tokyonight_day'
  end
end

config.color_scheme = scheme_for_appearance(get_appearance())

config.window_background_opacity = 0.7
config.win32_system_backdrop = 'Acrylic'

-- Font
config.font = wezterm.font_with_fallback {
  -- { family = 'Iosevka Term', weight = 'Medium' },
  'Cascadia Code',
  'JetBrainsMono NF',
}

config.font_size = 13
config.line_height = 1.2

-- Keychars
config.use_dead_keys = false

-- UI
config.use_fancy_tab_bar = false
config.tab_bar_at_bottom = true
config.hide_tab_bar_if_only_one_tab = true
config.enable_scroll_bar = false
config.window_padding = {
    left = 0,
    right = 0,
    top = 0,
    bottom = 0,
}
config.scrollback_lines = 7000
config.window_decorations = "RESIZE"

-- Shell
--- Set Pwsh as the default on Windows
config.default_prog = { 'pwsh.exe', '-NoLogo' }

config.launch_menu = {
    -- {
    --     label = 'PowerShell',
    --     args = { 'powershell.exe', '-NoLogo' },
    -- },
    {
        label = 'Pwsh',
        args = { 'pwsh.exe', '-NoLogo' },
    }, {
        label = 'Command Prompt',
        args = { 'cmd.exe', '-NoLogo' },
    },
    -- {
    --     label = 'Ubuntu',
    --     args = { 'wsl.exe -d Ubuntu-22.04', '-NoLogo' },
    -- },
}


-- Command Palette
config.command_palette_font_size = 13
config.command_palette_bg_color = "#394b70"
config.command_palette_fg_color = "#828bb8"
config.ui_key_cap_rendering = "WindowsSymbols"

-- config.enable_kitty_graphics=true

-- and finally, return the configuration to wezterm
return config

Expected Behavior

No response

Logs

11:19:22.370 INFO wezterm_gui::termwindow > clicking http://www.slf4j.org/codes.html#StaticLoggerBinder

Anything else?

No response

[wez]

If you try commenting out one or the other (or both) of these lines, does it get better?

config.window_background_opacity = 0.7
config.win32_system_backdrop = 'Acrylic'

[keanesc]

Yes commenting either line seems to fix it.
It is only when both are uncommented and the terminal is restarted that the artifacts reappear.

[wez]

Sounds like an issue with your graphics drivers, as those options don't change the way that wezterm directly works, they just set flags for your OS compositor.

[keanesc]

Sure, I'll try updating my graphics drivers and see if that resolves the issue. If it doesn't, do you have any other suggestions for things I could check?

[rafaeloledo]

@keanesc

Using Ryzen 5600G

Before driver update

WhatsApp.Video.2024-10-22.at.00.06.23.mp4

After

WhastApp.Video.2024-10-22.at.00.10.15.mp4

[miversen33]

I am experiencing the same issues. I do not have config.win32_system_backdrop = 'Acrylic' in my config, just opacity.

https://github.com/miversen33/miversen-dotfiles/blob/4b76297f072e18bfca4a64cf57b584d4bf73a420/terminals/wezterm/wezterm.lua

Not sure whats going on but resizing my window sometimes makes it go away.
Edit:

In my case, the issue is not consistent, it sometimes comes and sometimes goes.

[tankorsmash]

I'm on Windows 10 using Nvidia's 32.0.15.6094 driver (released in August 2024), and I'm having artifacts on screen when Wezterm is maximized but not in the foreground.

I can't reproduce it on command, but stops when I make Wezterm windowed. I do not have opacity enabled, but I do have the Acrylic backdrop enabled. I'll disable the Acrylic backdrop, and see if it helps at all.

edit: seems to have stopped the blurriness in other apps, thanks!

[rafaeloledo]

@tankorsmash

I don't know if it's the same issue that we're talking. But i've "discovered" that mine is with Alt-Tab feature.

Maybe it's caused by the applications box that pops up. I wonder if it's causing this blinking.

Recorded with obs using Alt-Tab:

Notice that the recording even collapse and get black screen

2024-10-31.01-01-21.mp4

Recorded with smartphone:

Using Alt-Tab until 00:13, then using Alt-Esc.

20241031_010317.mp4

Recorded with obs using Alt-Esc which doesn't pops the windows boxes:

2024-10-31.01-04-29.mp4

Overall i think it's a "how Windows handles fullscreen apps" problem, game developers quite often mention this. Any thoughts @wez ?

[tankorsmash]

Doesn't quite look like the effects I'm seeing locally, but I don't have them anymore since removing that flag. Must be an issue lower level though!

[rafaeloledo]

@tankorsmash acrylic is not working good for me either

for now i gived up using it on fullscreen xD

[GottZ]

ez reproducible on windows 10 without any acrylic effects.
Simply start wezterm and resize it. voila, you see the artifacts.

local wezterm = require 'wezterm'
local act = wezterm.action

local config = wezterm.config_builder()

config.font = wezterm.font('Pragmasevka Nerd Font')
--config.color_scheme = 'rose-pine'
config.color_scheme = 'zenwritten_dark'
--config.color_scheme = 'ayu'
config.ssh_backend = "Ssh2"

config.keys = {
  --{ key = "Insert", mods = "SHIFT", action = act.PasteFrom("PrimarySelection") }
  { key = "Insert", mods = "SHIFT", action = act.PasteFrom("Clipboard") }
}

return config