Hi liu
for "could not find or load the Qt platform plugin"xcb" " error please check
attached Linux Guide sect.8.4 Qt 5, build image using fsl-image-validation-qt5-imx
described in Table 1. i.MX Yocto project images Yocto Guide.
More info can be found on
i.MX 6 / i.MX 7 Series Software and Development Tool|NXP
Best regards
igor
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