I noticed recently problem with devg-extreme2 stability while using on Intel 82852GM integrated graphics device on 
LexSystem CI852A embedded SBC (pci -vvv output is attached).

After 10-20 consecutive runs of apllication which uses OpenGL ES (egl-ph-gears or egl-gears, for example), application 
hangs with all graphics stuff, only net and keyboard still work. It could hang at gf_display_detach() or gf_dev_attach()
 function calls (maybe during hardware initialization), but in another time it could hang somwhere inside rendering.

Bug could be reproduced easily when you will run egl-ph-gears and will try to resize window size (maximize/restore). 
Sometimes 30-40 resizes is enough to hang graphics driver.

While using the same graphics driver devg-extreme2 on 82865G (desktop chipset) all work fine, without any lockups.