在weston界面下运行Qt程序，开关显示器电源提示Segmentation fault？？

13813561956

现象是这样的， 我用Qt编写了一个程序， 显示分辨率是1920*1080的， qt程序的主窗体一直是最大化， 这时把显示器电源断电，然后再打开电源， 显示都正常的，  但如果Qt程序 打开一个设置对话框，界面尺寸不是1920*1080的，  这时把显示器电源一关， 就提示Segmentation fault，  这是什么原因？
QStandardPaths: wrong permissions on runtime directory /var/run, 7755 instead of 7700
QDevPA22S 0x7fa1738010
QObject::connect: No such slot MainWindow::timedraw_timeout()
QObject::connect:  (receiver name: 'MainWindow')
Could not parse stylesheet of object QLabel(0x29bb54f0, name = "lbdepth")
qt.qpa.wayland: No shell integration named "xdg-shell" found
[  167.351667] dwhdmi-rockchip fe0a0000.hdmi: failed to get edid
[  174.541871] dwhdmi-rockchip fe0a0000.hdmi: failed to get edid
qt.qpa.wayland: Ignoring unexpected wl_su**ce.leave received for output with id: 38 screen name: "HDMI-A-1" screen model: "unknown" This is most likely a bug in the compositor.
slot_data_startconnect 0x7f9b815190
Segmentation fault
[root@mengvm:/usr/local/meng]# [  294.165217] dwhdmi-rockchip fe0a0000.hdmi: failed to get edid

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13813561956

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