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Problems with official touchscreen in custom os

Posted: Thu Feb 28, 2019 2:58 am
by Algomatt
Hi, I hope this is the right subforum to post in.

I've been building my own stripped back version of Linux using BuildRoot https://buildroot.org/, specifically based off of Erpiam https://github.com/gbevin/erpiam.

Everything is working great with the official Raspberry Pi touchscreen except the mouse cursor is not 1:1 with the physical position of my finger on the screen. It also seems that I need to plug in a mouse or something before the touchscreen responds. I'm not sure what the difference is between what I have and what the normal OS's do.

The config settings seem to be what is required 'CONFIG_TOUCHSCREEN_RPI_FT5406=m' etc.

Any help would be much appreciated.

Re: Problems with official touchscreen in custom os

Posted: Thu Feb 28, 2019 10:00 am
by jamesh
You might need to specifiy the touchscreen resolution, see this page

https://www.raspberrypi.org/documentati ... /README.md