https://bugs.kde.org/show_bug.cgi?id=486585
--- Comment #2 from Jakub Piecuch <j.piecuc...@gmail.com> --- I dug into how the X server determines the monitor's physical size and it appears that the logic is as follows: 1. Find the first detailed timing section with sane physical width and height (the code sanity checks the aspect ratio) and use that as the monitor's width and height [1]. 2. If no such section was found, fall back to using the width and height from the "Basic Display Parameters & Features" section [2]. Therefore, it makes sense that the X server reports the correct physical size for my laptop's built-in display. [1] https://gitlab.freedesktop.org/xorg/xserver/-/blob/069ad69efe166105b8d2280bf2fb217d522b68a9/hw/xfree86/modes/xf86Crtc.c#L3175 [2] https://gitlab.freedesktop.org/xorg/xserver/-/blob/069ad69efe166105b8d2280bf2fb217d522b68a9/hw/xfree86/modes/xf86Crtc.c#L3299 -- You are receiving this mail because: You are watching all bug changes.