I’ve been trying to mess around with the display scaling on my Manjaro install, and I’ve discovered that the ‘global scale’ slider in the settings does… absolutely nothing. I can set it on any setting and hit ‘apply’ and nothing changes - the display settings window flickers, but everything remains exactly the same size regardless of whether I set it to 100% or 300%. This remains the case regardless of which setting the ‘save displays’ properties’ option is set to - the only way to change the size of UI elements seems to be reducing the screen resolution.
How can I diagnose and fix whatever’s going on here?