fqterm的问题：会一闪一闪的。
终端看到这些：

QSocketNotifier: Can only be used with threads started with QThread
[info 0 fqterm_trace.cpp: 44, setMaxTraceLevel] The upper bound of maximum trace level is 20
[info 0 fqterm_trace.cpp: 46, setMaxTraceLevel] The maximum trace level is set to 1
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
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