'''Setup: ''' Laptop with integrated Intel UHD 630, dedicated Nvidia RTX 2060 External Monitor connected via USB-C -> rendered through Nvidia card '''Issue:''' Yesterday i disabled my laptop display in the windows settings as i only need my monitor. This resulted in laggish scrolling behaviour in Firefox. Not always but mostly a delay of ~100-300ms. Scrolling up/down fast doesn't really scroll, it just jumps with said delay. It happens on touchpad or mouse (mx master s3). If i enable the main display (extended) everything is fine. '''Checked so far:''' * All input-related add-ons, apps (Logi Options+, xmouse button control, ...) are disabled or off * A reset or reinstall of Firefox doesn't help * Drivers are up to date * Changing the graphics performance preference (accelerated, energy saving) in the windows settings doesn't effect the behaviour * Smooth Scrolling is off Any idea what's the matter?