I've just installed Ubuntu (Studio) 19.04 on my old White Macbook 4,1. Most things work perfectly and it's snappy with a USB mouse but the trackpad is very laggy. Fast 'swipes' are not even recognise and it takes a noticeable amount of movement for the cursor to start moving and when it does it's slow and laggy to respond.

I've installed Synaptics and have spent a long time trying settings with synclient. The lag is still there whatever I try. This did not happen under OS X or when I tried CloudReady OS (Chrome OS).

Can anybody help? Somebody must be using one of these old Macbooks and have the trackpad working correctly. I'm not fussed about guestures, multitouch etc as long as the cursor is responsive.