The High Precision Event Timer (HPET) has long been a source of issues for Linux developers and it turns out systems relying on HPET rather than the CPU's TSC have in recent months suffered significant performance degradation with the Mesa OpenGL driver code.
Screen tear or input lag? To vsync or not to vsync? For the longest time, this was an either-or question in the PC gaming space. You could either have a tear-free, properly frame-paced image or low input latency. You couldn t have both. Or could you?
Well that depends. If you already have a modern gaming monitor that supports variable refresh rate (FreeSync or G-Sync), you don’t need to use this guide at all.
But if you have a regular, fixed refresh rate monitor, or if you like to play games on your TV, this guide will help you get a tangibly better experience in terms of screen tearing and input lag.