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AM335X 触摸屏出现偶尔无反应现象

各位大侠:

大家好,我在自制的AM335X板子上运行linux3.2,该板子用AM3354 cpu,基于SDK6.0,uboot为2013版,linux kernel版本为3.2.0

问题:改板子带一个7寸的电阻触摸屏,QT能正常运行.但是,有时会出现触摸屏无任何反应. cat  /dev/input/event0后,点击触摸屏,发现无任何数据输出,拔出触摸屏再插上,也无任何输出,重启机器后,触摸屏正常.QT同时支持鼠标触摸屏,此时,鼠标能正常工作. 有碰到这种情况的兄弟么?