Separators rendered with artefacts on osx external display

[zuchmanski]

Hi,

I am encountering an issue where the separators are rendered with artifacts. The problem happens ONLY on external display. When I run exactly the same config on my native macbook display tabs render just fine. I can also move window between external/internal display but the problem reoccur as soon as I force rerender of the bar (switch tabs etc).

External display: DELL U2720Q (4K, scaled down to 2560x1440). Internal display: macbook pro (3072x1920, also scaled down).

Config:

(require 'centaur-tabs)
(global-set-key (kbd "C-<prior>")  'centaur-tabs-backward)
(global-set-key (kbd "C-<next>") 'centaur-tabs-forward)

(setq centaur-tabs-style "bar"
      centaur-tabs-set-icons nil
      centaur-tabs-set-modified-marker t
      centaur-tabs-set-bar 'under
      centaur-tabs-height 40
      centaur-tabs-cycle-scope 'tabs
      centaur-tabs-set-close-button nil
      x-underline-at-descent-line t
      centaur-tabs-show-new-tab-button nil
      centaur-tabs-image-apple-rgb nil
      )

(centaur-tabs-change-fonts "Iosevka Term SS04" 130)

(set-face-attribute centaur-tabs-display-line nil :background "#E8E8E8" :box nil :overline nil :underline nil)
(centaur-tabs-group-by-projectile-project)

Running doom-emacs, emacs 28.1, centaur-tabs 20220926.1247.

How it looks like on internal display:

How it looks like on external display:

[jaaasonSun]

I came across this thread after seeing the same glitch on external display on macOS Sonoma. In case anyone need it, I was able to solve the issue by switching color profile for the display (I have two profile both named 'HP Z27k G3').