I'm running a linux build made with buildroot. Kernel is 18.104.22.168. We have developed a GUI using GTK+ and are running it with TinyX. The hardware is an AT91SAM9263 ARM9 running at 240MHz.
My original filesystem was built using Timesys; however, I have since rebuilt the filesystem with buildroot. Using the Timesys filesystem our GUI runs faster than with the buildroot filesystem. Here's the X start options:
Xfbdev -br -pn -xinerama -mouse tslib,,device=/dev/intput/event1 \
-keybd=keyboard -dpi=75 -noreset