intermittent waybar flickering on hyprland

[icy-comet]

Waybar constantly flickers on Hyprland with auto-variations in its size, not respecting the border-radius or having an extra window-like border. I am not sure if the issue lies on the Hyprland side, but starting here. Waybar doesn't crash or report any errors/warnings whatsoever. There seems to be no consistent way to reproduce the issue. I managed to record some of the artifacts, but not all of them in a video attached below.

I am on Waybar v0.11.0 and using the hyprland-git package.

Hyprland Version Info

Hyprland 0.46.0 built from branch main at commit b0bae15499ad57bbfeae8be958df8c022201e583  (master: make loop around optional when cycling (8926)).
Date: Sat Jan 4 22:10:33 2025
Tag: v0.46.0-73-gb0bae154, commits: 5628
built against:
 aquamarine 0.5.1
 hyprlang 0.6.0
 hyprutils 0.3.1
 hyprcursor 0.1.11
 hyprgraphics 0.1.1


no flags were set

Sample Video

-6000.mp4

[icy-comet]

hyprwm/Hyprland#8896 seems to be related as well as hyprwm/Hyprland#8889

[littleblack111]

its a hyprland issue, happen to some other applications too...

[icy-comet]

hyprwm/Hyprland@1b06d22 fixed the flickering issue. however, some border artifacts still remain. waiting for hyprwm/Hyprland#8896.

[ninetailedtori]

Yep, same results as just above for me for Hyprland commit b9f110e .

[icy-comet]

waybar is sending an incorrect opaque region

from hyprwm/Hyprland#8896 (comment) suggests the border artifacts aren't caused by an issue at Hyprland's end.

[ninetailedtori]

Flickering feels very similar to issue with the general NVIDIA issues with hyprland, I'd check your config to make sure you're setting all default renderers to nvidia?

# See https://wiki.hyprland.org/Nvidia/

env = LIBVA_DRIVER_NAME,nvidia
env = __GLX_VENDOR_LIBRARY_NAME,nvidia
env = __GL_VRR_ALLOWED,1
env = WLR_DRM_NO_ATOMIC,1

cursor:no_hardware_cursors = true

The artifacts I can't seem to reproduce, it may be your blur or shadow around the edges that you may have set flickering? There's a known hyprland issue with layerrule blurs and box shadows being rendered incorrectly as solid or blur boxes around objects.

[icy-comet]

setting all default renderers to nvidia

i have a OPTIMUS laptop without a MUX switch. can't use the discrete GPU for display rendering.