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QT5 on IMX6q - graphics stuttering after HDMI reconnect
rickp last edited by rickp
we have an embedded QT5 application running on an IMX6 quad system. The OS is Yocto sumo (kernel 4.9.67) and the QT app is running fullscreen on eglfs at 1920x1080@30Hz on a HDMI-connected monitor.
Everything is fine after the application starts but when the HDMI cable is dis- and reconnected or we reset the resolution at runtime via writing to /sys/class/graphics/fb0/mode the application starts dropping frames (Animations that ran smooth before start stuttering). The problem goes away when the QT application is restarted.
What we tried until now without success:
- Enabling HDMI at boot through the video parameter of the kernel command line
- Upgrading Yocto to warrior
Do you have any hints on what might cause this and what we cound try next? We're OK with patching kernel or QT code.
hi @rickp and welcome,
I don't think this is an issue that many user's have encountered.
So I would suggest to bring this on the mailing list of Qt.
You may have more luck there.